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Explanation The M4 Carbine is chambered in 5.56 NATO. This is the correct answer because the M4 Carbine is a standard issue firearm for the United States military, and it is well-known that it uses the 5.56 NATO caliber.
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2.
What rounds are standard duty issue for the M4 carbine?
A.
M855 Ball / M856 Tracer
B.
M193 Ball / M196 Tracer
C.
M200 Blank / M199 Dummy
D.
M80 Ball / M406 Tracer
Correct Answer
A. M855 Ball / M856 Tracer
Explanation The M4 carbine is typically issued with M855 Ball and M856 Tracer rounds. The M855 Ball round is a standard 5.56mm NATO round used by the United States military. It is known for its penetration capabilities and is commonly used for general-purpose shooting. The M856 Tracer round, on the other hand, is used for observation of fire, signaling, and incendiary purposes. Tracer rounds have a pyrotechnic charge that ignites upon firing, making the projectile visible during flight. Together, the M855 Ball and M856 Tracer rounds provide a versatile ammunition combination for the M4 carbine.
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3.
Can M193 ball and M196 Tracer be safely fired in the M4 carbine?
A.
Yes
B.
No
Correct Answer
A. Yes
Explanation Yes, M193 ball and M196 Tracer can be safely fired in the M4 carbine. Both types of ammunition are compatible with the M4 carbine and are commonly used in military and law enforcement applications. The M4 carbine is designed to handle a variety of ammunition types, including ball and tracer rounds, without any safety concerns. Therefore, it is safe to fire M193 ball and M196 Tracer in the M4 carbine.
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4.
How can M855 ball ammunition be identified?
A.
Copper jacketed projectile with green tip
B.
Fluted case
C.
Violet colored tip
D.
Copper jacketed projectile
Correct Answer
A. Copper jacketed projectile with green tip
Explanation M855 ball ammunition can be identified by its copper jacketed projectile with a green tip. This specific combination of features distinguishes it from other types of ammunition. The copper jacketed projectile refers to the outer covering of the bullet, which is made of copper. The green tip indicates that it is M855 ammunition, as different types of ammunition can have different colored tips for identification purposes. Therefore, the presence of a copper jacketed projectile with a green tip is the key characteristic that allows for the identification of M855 ball ammunition.
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5.
How many rounds can be loaded into the standard issue M4 carbine magazine?
A.
30
B.
28
C.
20
D.
15
Correct Answer
A. 30
Explanation The correct answer is 30 because the standard issue M4 carbine magazine has a capacity of 30 rounds. This means that it can hold up to 30 bullets before needing to be reloaded.
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6.
Loaded with a 30 round magazine, the M4 cabine weighs?
A.
7.5 lbs
B.
8.79 lbs
C.
6 lbs
D.
6.49 lbs
Correct Answer
A. 7.5 lbs
Explanation The M4 carbine weighs 7.5 lbs when loaded with a 30 round magazine.
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7.
What is the purpose of the compensator on the M4 carbine?
A.
Helps keep the muzzle from rising during firing
B.
Protects the muzzle from dirt
C.
Increases muzzle flash when fired
D.
Used to mount AN/PAQ-4C laser
Correct Answer
A. Helps keep the muzzle from rising during firing
Explanation The compensator on the M4 carbine helps keep the muzzle from rising during firing. When a firearm is fired, the force of the expanding gases pushes the muzzle upward, causing recoil and making it harder to maintain accuracy. The compensator is designed to redirect some of those gases in a way that counteracts the upward force, reducing muzzle rise and making it easier for the shooter to stay on target. This improves overall stability and control during rapid or sustained fire.
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8.
What is the correct description of the M4 Carbine?
A.
Light weight, gas operated, air cooled, magazine fed, shoulder fired weapon
B.
Light weight, reciol operated, air cooled, magazine fed, hip fired weapon
C.
Light weight, belt fed, blow back operated, hip fired weapon
Explanation The cycle of operation for the M4 Carbine begins with feeding, where a new round is loaded into the chamber. Then, the round is chambered, meaning it is positioned properly in the chamber ready to be fired. Next, the weapon locks, ensuring that the round is securely in place and the bolt is in the correct position. The firing stage comes next, where the round is discharged. After firing, the weapon unlocks, allowing the bolt to move back and start the extraction process. The extraction stage involves removing the spent casing from the chamber. Then, the casing is ejected from the weapon. Finally, the bolt is cocked back into the ready position for the next round to be fed into the chamber.
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10.
What is the maximum effective range with the M4 carbine on a "point target"?
A.
500 m
B.
550 m
C.
600 m
D.
3600 m
Correct Answer
A. 500 m
Explanation The maximum effective range with the M4 carbine on a "point target" is 500 m. This means that the M4 carbine is designed to accurately hit a specific point target up to a distance of 500 meters. Beyond this range, the accuracy and effectiveness of the weapon may significantly decrease.
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11.
What is the maximum effective range with the M4 carbine on an "area target"?
A.
500 m
B.
550 m
C.
600 m
D.
3600 m
Correct Answer
C. 600 m
Explanation The maximum effective range with the M4 carbine on an "area target" is 600 m. This means that the weapon is capable of accurately engaging and hitting targets within a 600-meter radius. This range allows for effective engagement of multiple targets in a given area, making it a versatile weapon for various combat situations.
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12.
What is the maximum effective rate of fire on "semi" for the M4 carbine?
A.
700 - 970 rpm
B.
12 - 15 rpm
C.
45 rpm
D.
90 rpm
Correct Answer
C. 45 rpm
Explanation The correct answer is 45 rpm. This means that the M4 carbine can fire a maximum of 45 rounds per minute when set on the "semi" firing mode. This rate of fire is relatively low compared to the other options provided.
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13.
What is the maximum effective rate of fire on "burst" for the M4 carbine?
A.
700 - 970 rpm
B.
12 - 15 rpm
C.
45 rpm
D.
90 rpm
Correct Answer
D. 90 rpm
Explanation The maximum effective rate of fire on "burst" for the M4 carbine is 90 rpm. This means that the firearm can fire a maximum of 90 rounds per minute when set to the burst mode. This rate of fire allows for controlled and accurate bursts of fire, making it suitable for engaging targets at medium ranges.
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14.
The M4 carbine has a maximum range of?
A.
3600 m
B.
2653 m
C.
1 Kilometer
D.
500 m
Correct Answer
A. 3600 m
Explanation The M4 carbine has a maximum range of 3600 m. This means that the firearm is capable of accurately hitting a target up to a distance of 3600 meters. This range is quite impressive for a carbine, as it allows for effective engagement of targets at long distances. This extended range can be attributed to the design and capabilities of the M4 carbine, such as its barrel length and ammunition.
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15.
What is the cyclic rate of fire for the M4 carbine?
A.
12 - 15 rpm
B.
45 rpm
C.
700 - 970 rpm
D.
90 rpm
Correct Answer
C. 700 - 970 rpm
Explanation The cyclic rate of fire for the M4 carbine is 700 - 970 rpm. This means that the firearm is capable of firing between 700 and 970 rounds per minute. This high rate of fire allows for rapid and continuous shooting, making the M4 carbine an effective weapon in combat situations.
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16.
What is the sustained rate of fire for the M4 carbine?
A.
12 - 15 rpm
B.
45 rpm
C.
90 rpm
D.
700 - 970 rpm
Correct Answer
A. 12 - 15 rpm
Explanation The sustained rate of fire for the M4 carbine is 12 - 15 rounds per minute. This means that the weapon is designed to be fired continuously at a rate of 12 to 15 rounds per minute without overheating or causing excessive wear on the barrel. This rate of fire allows for controlled and accurate shooting while maintaining the weapon's effectiveness and reliability.
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17.
What are the proper steps to "clearing" the M4 carbine?
A.
Place selector lever on "Safe" if possible, remove magazine, lock bolt to rear, check chamber, ensure selector on "safe", let the bolt go foward
B.
Place selector lever on "safe" if possible, remove magazine, check chamber, ensure selector on "safe"
C.
Remove magazine, charge weapon 3 times, place finger in chamber, place selector lever on "safe"
D.
Remove magazine, place selector on "safe", squeeze trigger and hold, charge weapons, release trigger and listen for audible "click"
Correct Answer
A. Place selector lever on "Safe" if possible, remove magazine, lock bolt to rear, check chamber, ensure selector on "safe", let the bolt go foward
Explanation The proper steps to "clearing" the M4 carbine are to first place the selector lever on "Safe" if possible. Then, remove the magazine and lock the bolt to the rear. Next, check the chamber and ensure that the selector is on "Safe". Finally, let the bolt go forward. This sequence of steps ensures that the firearm is safely cleared and ready for storage or maintenance.
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18.
What is the proper loading procedure for the M4 carbine for duty?
A.
Verify weapon clear, insert magazine, close bolt, tap forward assist, ensure selector on "semi"
B.
Verify weapon clear, selector to "safe", close bolt, close ejection port cover, press trigger (hammer should not fall), insert magazine (if authorized), ensure selector on "safe"
C.
Remove empty magazine, insert loaded magazine, close bolt, ensure selector to "safe"
D.
Verify weapon clear, close bolt, insert magazine, ensure selector on "safe, charge weapon
Correct Answer
B. Verify weapon clear, selector to "safe", close bolt, close ejection port cover, press trigger (hammer should not fall), insert magazine (if authorized), ensure selector on "safe"
Explanation The proper loading procedure for the M4 carbine for duty is to first verify that the weapon is clear, then move the selector to "safe", close the bolt, close the ejection port cover, and press the trigger to ensure that the hammer does not fall. If authorized, the magazine should then be inserted, and the selector should be returned to "safe". This sequence ensures that the weapon is safely loaded and ready for use in a duty situation.
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19.
What is the proper procedure for reloading the M4 carbine?
A.
Remove empty magazine, insert loaded magazine, and hit bolt catch to close the bolt, tap forward assist
B.
Place weapon on "safe", remove empty magazine, hit bolt catch to close the bolt, insert loaded magazine, charge weapon
C.
Place selector lever on "safe", remove emty magazine, insert loaded magazine, hit bolt catch to close bolt
D.
Remover empty magazine, insert loaded magazine, hit bolt catch to clsoe bolt, charge weapon
Correct Answer
A. Remove empty magazine, insert loaded magazine, and hit bolt catch to close the bolt, tap forward assist
Explanation The proper procedure for reloading the M4 carbine is to remove the empty magazine, insert a loaded magazine, and hit the bolt catch to close the bolt. Additionally, tapping the forward assist may be necessary to ensure the bolt is fully closed. This sequence of steps ensures that the weapon is ready to fire with a new magazine and the bolt is properly seated.
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20.
If you pull the trigger and your M4 carbine fails to fire, what must you do?
A.
Keep the weapon pointed in a safe direction, raise your firing hand and wait for help
B.
Execute a rapid reload, and continue to fire
C.
Clear your weapon, detail strip and inspect parts for chips, cracks, and burrs
D.
Quickly apply immediate action procedures
Correct Answer
D. Quickly apply immediate action procedures
Explanation If you pull the trigger and your M4 carbine fails to fire, you should quickly apply immediate action procedures. This means that you should first keep the weapon pointed in a safe direction to prevent any accidental discharge. Then, you need to quickly perform a series of actions to clear any potential malfunctions, such as tap, rack, and reassess. This procedure is designed to quickly address common issues and get the weapon back into a firing condition as soon as possible.
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21.
What acronym identifies the proper "immediate action" procedures for the M4 carbine?
A.
LACE
B.
SALUTE
C.
SPORTS
D.
TTFN
Correct Answer
C. SPORTS
Explanation SPORTS is the acronym that identifies the proper "immediate action" procedures for the M4 carbine. These procedures are used when a malfunction occurs with the weapon. SPORTS stands for Slap, Pull, Observe, Release, Tap, and Shoot. Slap refers to slapping the magazine to ensure it is properly seated, Pull means pulling the charging handle to the rear to extract any stuck rounds, Observe involves observing the ejection of the round, Release involves releasing the charging handle, Tap means tapping the forward assist to ensure the bolt is fully forward, and Shoot means firing the weapon to continue engaging the target.
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22.
What are the steps to applying "immediate action" to the M4 carbine?
A.
Tap upward on bottom of magazine, charge weapon, attempt to fire
B.
Clear weapon, charge weapon 3 times, reload, attempt to fire
C.
Slap upward on the bottom of the magazine, pull charging handle to rear, observe for ejection of round or empty case, ensure chamber is clear, release charging handle, tap forward assist, squeeze trigger to shoot
D.
Slap side of magazine to seat rounds, charge weapon, tap forward assist, attempt to fire
Correct Answer
C. Slap upward on the bottom of the magazine, pull charging handle to rear, observe for ejection of round or empty case, ensure chamber is clear, release charging handle, tap forward assist, squeeze trigger to shoot
Explanation The correct answer explains the steps to applying "immediate action" to the M4 carbine. It involves slapping upward on the bottom of the magazine, pulling the charging handle to the rear, observing for ejection of a round or empty case, ensuring the chamber is clear, releasing the charging handle, tapping the forward assist, and finally squeezing the trigger to shoot. These steps are necessary to quickly address any malfunctions or issues with the weapon and ensure it is ready to fire.
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23.
How soon should "immediate action" be applied to avoid possible cook-off of a round?
A.
Within 15 seconds
B.
Within 1 second
C.
Within 30 seconds
D.
Within 10 seconds
Correct Answer
D. Within 10 seconds
Explanation "Immediate action" should be applied within 10 seconds to avoid possible cook-off of a round. This suggests that there is a risk of the round exploding or firing if action is not taken within this timeframe. Taking action within 10 seconds is crucial to prevent any potential accidents or harm.
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24.
How many rounds fire continuously and rapidly through the M4 carbine can cause the weapon to heat up to the cook-off point?
A.
210
B.
120
C.
4 to 1 ratio
D.
140
Correct Answer
D. 140
Explanation The correct answer is 140. Continuous and rapid firing can cause the M4 carbine to heat up to the cook-off point after firing approximately 140 rounds. This means that if the weapon is fired continuously and rapidly, without allowing it to cool down, it will reach a temperature where the ammunition inside can ignite spontaneously.
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25.
If after applying "immediate action" to your M4 carbine, it still fails to fire, what action should be taken?
A.
Wait 15 minutes, disassemble and inspect parts for breakage
B.
Retrieve CDCs and follow instructions listed
C.
Apply "remedial actions" procedures
D.
Report the situation to your supervisor or control center
Correct Answer
C. Apply "remedial actions" procedures
Explanation If after applying "immediate action" to your M4 carbine, it still fails to fire, the appropriate action to take is to apply "remedial actions" procedures. This means following the prescribed steps or protocols to troubleshoot and fix the issue with the firearm. It could involve checking for any obstructions, ensuring the magazine is properly seated, clearing any malfunctions, or seeking further assistance if necessary. This step is crucial in attempting to resolve the problem before escalating it to a supervisor or control center.
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26.
What are the proper steps for applying "remedial action" to the M4 carbine with a "failure to feed"?
A.
Clear weapon, remove jammed rounds, reload and attempt to fire
B.
Execute a tactical relaod, charge weapon and attempt to fire
C.
Disassemble weapon and apply operator maintenance
D.
Inspect magazine to ensure rounds are seated
Correct Answer
A. Clear weapon, remove jammed rounds, reload and attempt to fire
Explanation The proper steps for applying "remedial action" to the M4 carbine with a "failure to feed" are to clear the weapon, remove any jammed rounds, reload the weapon, and then attempt to fire it. This sequence of actions is necessary to address the issue and ensure that the weapon functions properly.
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27.
While applying Immediate action you observe a round in the chamber of your M4 carbine and you suspect the weapon is hot enough to cause a cook-off, what action should you take?
A.
Stare into the ejection port while charging the weapon for 10 seconds to see if round cooks off.
B.
Keep your face away from the ejection port and remove the round fast. If you can't remove the round within 10 seconds, remove the magazine and let the weapon cool for 15 minutes
C.
Remove magazine, charge weapon 3 times, reload and attempt to fire
D.
Call Combat Arms
Correct Answer
B. Keep your face away from the ejection port and remove the round fast. If you can't remove the round within 10 seconds, remove the magazine and let the weapon cool for 15 minutes
Explanation If you suspect that the weapon is hot enough to cause a cook-off, it is important to keep your face away from the ejection port to avoid any potential injury. The correct action is to remove the round quickly. If you are unable to remove the round within 10 seconds, the next step is to remove the magazine and allow the weapon to cool for 15 minutes. This will help prevent any potential accidents or injuries that could occur from a cook-off.
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28.
If you cannot remove a round from the "hot" chamber of your M4 carbine within 10 seconds, what action should you take?
A.
Remove magazine, charge weapon and attempt to fire
B.
Lock bolt to the rear and attempt to remove the round using your issue Multi-tool or pocket knife
C.
Keep your face away from the ejection port, point weapon in a safe direction, remove the magazine and let weapon cool for 15 minutes
D.
Close the ejection port cover, pour water on the weapon to cool it and wait 30 minutes.
Correct Answer
C. Keep your face away from the ejection port, point weapon in a safe direction, remove the magazine and let weapon cool for 15 minutes
Explanation If you cannot remove a round from the "hot" chamber of your M4 carbine within 10 seconds, the appropriate action to take is to keep your face away from the ejection port, point the weapon in a safe direction, remove the magazine, and let the weapon cool for 15 minutes. This is the safest course of action to prevent any accidental discharge or injury.
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29.
What is the definition of a "Cook-Off"?
A.
When a round self detonates from heat buildup in a weapons chamber
B.
A delayed detonation of the round after the trigger has been pressed
C.
A live round that has been ejected detonates after striking a rock or hard surface
D.
A round that fails to fire after immediate action has been applied
Correct Answer
A. When a round self detonates from heat buildup in a weapons chamber
Explanation A "Cook-Off" refers to a situation where a round of ammunition detonates spontaneously due to the high temperature and heat buildup in the chamber of a weapon. This can occur when the weapon has been fired rapidly, causing the chamber to become extremely hot. The heat can then cause the propellant in the round to ignite, leading to an unintended explosion.
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30.
If you hear a "pop" or experience a noticeable change in felt recoil while firing th M4 carbine, what should you do?
A.
Apply "immediate action" within 10 seconds
B.
Apply "remedial action" within 10 seconds
C.
Do Not apply "immediate action", sop firing immediately because a bullet could be stuck in the barrel
D.
Apply "SPORTS" within 10 seconds to remove the bullet stuck in the barrel
Correct Answer
C. Do Not apply "immediate action", sop firing immediately because a bullet could be stuck in the barrel
Explanation If you hear a "pop" or experience a noticeable change in felt recoil while firing the M4 carbine, you should immediately stop firing because a bullet could be stuck in the barrel. Applying "immediate action" or "remedial action" within 10 seconds could potentially cause further damage or injury. It is important to prioritize safety and properly assess the situation before taking any action.
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31.
What could happen if immediate action is applied and the M4 carbine is fired with a bullet stuck in the barrel?
A.
The barrel could melt cause damage to the weapon
B.
The weapon could explode resulting in damage to the weapon and injury or death to the shooter or others
C.
The round could cook-off
D.
Ammunition could be damaged to the point it would have to be turned in
Correct Answer
B. The weapon could explode resulting in damage to the weapon and injury or death to the shooter or others
Explanation If immediate action is applied and the M4 carbine is fired with a bullet stuck in the barrel, the weapon could explode. This would not only cause damage to the weapon but also pose a significant risk of injury or even death to the shooter or others in the vicinity.
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32.
What should you do if you believe a bullet may be stuck in the barrel of your M4 carbine?
A.
Clear the weapon, open the receivers, remove the bolt carrier group and inspect the barrel for obstruction
B.
Use your cleaning rod to pust the stuck bullet out of the barrel
C.
Load another ound into the weapon and fire it to force the stuck bullet out of the barrel
D.
Contact your supervisor or control center
Correct Answer
A. Clear the weapon, open the receivers, remove the bolt carrier group and inspect the barrel for obstruction
Explanation If you believe a bullet may be stuck in the barrel of your M4 carbine, the correct action to take is to clear the weapon, open the receivers, remove the bolt carrier group, and inspect the barrel for obstruction. This is the safest and most effective way to address the potential issue and ensure the firearm is in proper working condition.
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33.
What type of malfunction is considered "extremely serious" because of the hazard to the shooter?
A.
Failure to eject
B.
Failure to extract
C.
Failure to feed
D.
Failure to fire
Correct Answer
B. Failure to extract
Explanation Failure to extract is considered "extremely serious" because it refers to the malfunction where the spent casing remains stuck in the chamber after firing. This can lead to a dangerous situation as the shooter may not be able to load a new round into the chamber, rendering the firearm inoperable. Additionally, attempting to fire another round with a stuck casing can result in a catastrophic failure, causing harm to the shooter and those nearby. It is crucial for a firearm to properly extract the spent casing to ensure safe and reliable operation.
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34.
What 3 types of lubricrants are authorized for use on the M4 carbine?
A.
CLP, LSA, LAW
B.
CLP, LSA, RBC
C.
CLP, LSA, Dry Cleaning Solvent
D.
Militec, Hopped #9, LSAT
Correct Answer
A. CLP, LSA, LAW
Explanation The correct answer is CLP, LSA, LAW. CLP stands for Cleaner, Lubricant, and Protectant, which is a multi-purpose lubricant commonly used on firearms. LSA stands for Lubricant, Semi-Fluid, Automatic Weapons, which is specifically designed for automatic weapons like the M4 carbine. LAW stands for Lubricant, Arctic Weapons, which is a lubricant specifically formulated for use in cold weather conditions. These three lubricants are authorized for use on the M4 carbine to ensure proper functioning and maintenance of the firearm.
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35.
What temperature ranges require you to use CLP or LSA on your M4 Carbine?
A.
-10 C and above
B.
32 F to 120 F
C.
-10 F and below
D.
-10 F and above
Correct Answer
D. -10 F and above
Explanation The correct answer is -10 F and above. This temperature range indicates that the M4 Carbine can be used in temperatures below -10 degrees Fahrenheit as well as temperatures above -10 degrees Fahrenheit. CLP (Cleaner, Lubricant, and Preservative) or LSA (Weapon Lubricant, Semi-fluid) are necessary to ensure proper functioning and maintenance of the firearm within this temperature range.
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36.
For operation under arctic conditions below -10 F, what lubricant must be used on the M4 carbine?
A.
CLP
B.
LSA
C.
LAW
D.
10W30 synthetic
Correct Answer
C. LAW
Explanation The correct lubricant to be used on the M4 carbine for operation under arctic conditions below -10 F is LAW.
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37.
Can two different types of lubricant be used simultaneously on the M4 carbine?
A.
Yes
B.
No
Correct Answer
B. No
Explanation No, two different types of lubricant should not be used simultaneously on the M4 carbine. Mixing different types of lubricants can lead to chemical reactions or inconsistencies in performance, potentially causing damage to the firearm or reducing its effectiveness. It is recommended to use a single type of lubricant that is suitable for the M4 carbine.
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38.
What is the definition of "Lightly Lubricated"?
A.
Barely visible to the eye
B.
Enough to be spread with a finger
C.
Dripping wet
D.
Not visible to the eye
Correct Answer
A. Barely visible to the eye
Explanation The definition of "Lightly Lubricated" is when something is barely visible to the eye. This means that there is a small amount of lubrication present, but it is not excessive or dripping wet. It is enough to provide some lubrication, but not so much that it is easily noticeable.
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39.
What is the definition of "Generously Lubricated"?
A.
Barely visible to the eye
B.
Enough to be spread with a finger
C.
Dripping wet
D.
Not visible to the eye
Correct Answer
B. Enough to be spread with a finger
Explanation The definition of "Generously Lubricated" is when there is enough lubrication present to be easily spread with a finger. This implies that there is a sufficient amount of lubricant to facilitate smooth movement or reduce friction. It suggests a moderate to high level of lubrication, but not to the extent of being dripping wet.
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40.
What must you do before switching lubricants on the M4 carbine?
A.
Thoroughly clean the weapon with a pressure washer
B.
Completely remove the old lubricant
C.
Clean the weapon with gasoline
D.
Wipe the weapon down with a soft clean cloth
Correct Answer
B. Completely remove the old lubricant
Explanation Before switching lubricants on the M4 carbine, it is important to completely remove the old lubricant. This is necessary to ensure that there is no residue or contamination from the previous lubricant, which could potentially affect the performance and functionality of the weapon. By thoroughly removing the old lubricant, the M4 carbine can be properly cleaned and prepared for the application of the new lubricant, ensuring optimal operation and maintenance.
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41.
Under arctic conditions, what action should be taken to prevent the M4 carbine from freezing up and becoming in-operable?
A.
Clear the weapon and hand cycle the weapon every 30 minutes
B.
Clean the weapon every 24 hours with LAW
C.
Pour warm water over the weapon every 30 minutes
D.
Test fire the weapon frequently
Correct Answer
A. Clear the weapon and hand cycle the weapon every 30 minutes
Explanation To prevent the M4 carbine from freezing up and becoming inoperable under arctic conditions, the best action to take is to clear the weapon and hand cycle it every 30 minutes. This means removing any ice or snow buildup, checking for any malfunctions, and manually cycling the action to ensure it remains functional. This regular maintenance helps to prevent freezing and ensures the weapon remains operational in extreme cold temperatures.
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42.
Under hot, wet (jungle) conditions, how should th M4 carbine be lubricated?
A.
Remove all lubricant and wipe clean more frequently
B.
Clean and lubricate more frequently with LSA or CLP
C.
Lubricate more frequently with LAW
D.
Apply generous amount of LSA to all non-metal parts of the weapon
Correct Answer
B. Clean and lubricate more frequently with LSA or CLP
Explanation In hot, wet jungle conditions, the M4 carbine should be cleaned and lubricated more frequently with LSA or CLP. This is because the high humidity and moisture in the jungle environment can cause the weapon to rust and malfunction. Regular cleaning and lubrication with LSA or CLP helps to prevent rust and keep the weapon functioning properly.
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43.
What must the weapon and magazines be frequently inspected for in a hot, wet (jungle) climate?
A.
Cracked or worn parts
B.
Corrosion
C.
Mold and mildew
D.
Carbon build-up in bore
Correct Answer
B. Corrosion
Explanation In a hot, wet jungle climate, the weapon and magazines are prone to corrosion due to the high humidity and moisture levels. Corrosion can cause damage to the metal parts, affecting their functionality and reliability. Therefore, frequent inspections are necessary to identify any signs of corrosion and take appropriate measures to prevent further damage.
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44.
In a hot, dry (desert) climate, how should the M4 carbine be lubricated?
A.
Lightly lubricate internal parts only using CLP or LSA
B.
Lighlty lubricate internal parts only using LAW
C.
Lighly lubricate all metal parts using CLP or LSA
D.
Generously lubricate more frequently using CLP or LSA
Correct Answer
A. Lightly lubricate internal parts only using CLP or LSA
Explanation In a hot, dry desert climate, the M4 carbine should be lightly lubricated on internal parts only using CLP or LSA. This is because excessive lubrication can attract dust and sand, leading to malfunctions and decreased performance. Light lubrication on internal parts helps to reduce friction and ensure smooth operation without compromising the weapon's functionality in the harsh desert environment.
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45.
In a hot, (desert) climate, what must be continually cleaned from the weapon to prevent stoppages?
A.
Moisture
B.
Rust
C.
Fingerprints
D.
Sand, fine dust
Correct Answer
D. Sand, fine dust
Explanation In a hot, desert climate, sand and fine dust are likely to be present in abundance. These particles can easily enter the weapon and cause stoppages by clogging the mechanisms or interfering with the moving parts. Therefore, it is crucial to continually clean the weapon to remove the sand and fine dust and prevent any potential stoppages.
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46.
In hot, dry (desert) climate, how often should you clean your M4 Carbine?
A.
Daily or as soon as possible after firing
B.
Every 30 minutes
C.
When you can spread the dust around with your finger
D.
When your supervisor tells you to
Correct Answer
A. Daily or as soon as possible after firing
Explanation In a hot, dry desert climate, the M4 Carbine is more prone to dust and sand accumulation, which can affect its performance. Therefore, it is necessary to clean the M4 Carbine daily or as soon as possible after firing to prevent any damage caused by the dust and to maintain its functionality in such harsh conditions.
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47.
In a hot, dry (desert) climate, what can you do to help keep dust and sand out of your M4 carbine?
A.
Use muzzle cap, keep ejection port closed, keep magazine installed, use protective bag
B.
Clean weapon and magazines frequently
C.
Both; Use muzzle cap, keep ejecion port closed, keep magazine installed, use protective bag, and clean weaopn and magazines frequently
D.
Generously lubricate all surfaces with CLP
Correct Answer
C. Both; Use muzzle cap, keep ejecion port closed, keep magazine installed, use protective bag, and clean weaopn and magazines frequently
Explanation In a hot, dry desert climate, using a muzzle cap, keeping the ejection port closed, keeping the magazine installed, using a protective bag, and cleaning the weapon and magazines frequently can help keep dust and sand out of the M4 carbine. The muzzle cap prevents debris from entering the barrel, keeping the ejection port closed prevents dust from entering the weapon, keeping the magazine installed prevents dust from entering through the magazine well, and using a protective bag provides an extra layer of protection. Cleaning the weapon and magazines frequently helps remove any accumulated dust and sand, ensuring the proper functioning of the carbine.
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48.
As a minimum, what items must be contained in the M4 weapon cleaning kit?
A.
Cleaning rod sections, cleaning rod handle, eyelet, small arms cleaning brush (tooth brush), bore brush, chamber brush, patches, cloth, pipe cleaners, lubricant and/or CLP.
Cleaning rod sections, cleaning rod handle, eyelet, tooth brush, bore brush, chamber brush, patches, cloth, lubricant and/or CLP.
D.
Cleaning rod sections, cleaning rod handle, toothbrush, bore brush, chamber brush, patches, cloth, pipe cleaners, lubricant and/or CLP.
Correct Answer
A. Cleaning rod sections, cleaning rod handle, eyelet, small arms cleaning brush (tooth brush), bore brush, chamber brush, patches, cloth, pipe cleaners, lubricant and/or CLP.
Explanation The M4 weapon cleaning kit must contain cleaning rod sections, cleaning rod handle, eyelet, small arms cleaning brush (toothbrush), bore brush, chamber brush, patches, cloth, pipe cleaners, and lubricant and/or CLP.
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49.
What lubricant is also used to clean the M4 Carbine?
A.
LAW
B.
RBC
C.
LSA
D.
CLP
Correct Answer
D. CLP
Explanation CLP stands for Cleaner, Lubricant, and Protectant. It is a versatile lubricant that is commonly used to clean and maintain firearms, including the M4 Carbine. CLP not only lubricates the moving parts of the firearm but also helps to remove dirt, carbon buildup, and other contaminants. It also provides a protective coating to prevent rust and corrosion. Therefore, CLP is the appropriate lubricant to clean the M4 Carbine.
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50.
What item from your cleaning kit should be used to clean the firing pin hole in the bolt of the M4 carbine?
A.
Worn bore brush
B.
Chamber brush
C.
Patch and firing pin
D.
Pipe cleaner
Correct Answer
D. Pipe cleaner
Explanation A pipe cleaner should be used to clean the firing pin hole in the bolt of the M4 carbine. Pipe cleaners are thin and flexible, making them ideal for reaching into small and narrow spaces. They can effectively remove dirt, debris, and residue that may accumulate in the firing pin hole, ensuring proper functioning of the firearm.
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