Engine System Components Quiz
These are the UREs from the third volume of CDCs. Use these and your volumes as a study tool for the EOC. Good luck!
- 1.
What is the coposition of JP8?
- A.
Gasoline and kerosene
- B.
Diesel fuel and kerosene
- C.
Diesel fuel and AV gas
- D.
Gasoline and diesel fuel
Correct Answer
A. Gasoline and keroseneExplanation
JP8 is a type of jet fuel commonly used by military aircraft. It is a mixture of gasoline and kerosene. Gasoline provides the necessary energy for combustion, while kerosene helps to improve the fuel's stability and performance at high altitudes. This composition allows JP8 to meet the specific requirements of military aircraft, such as high energy density and low freezing point.Rate this question:
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- 2.
At room temperature how many times longer does it take water to settle in JP8 than in gasoline?
- A.
1
- B.
2
- C.
4
- D.
5
Correct Answer
C. 4Explanation
Water takes 4 times longer to settle in JP8 than in gasoline at room temperature.Rate this question:
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- 3.
The main fuel control allows the engine to safetly accelerate reducing the possibility of a
- A.
Flameout
- B.
Turbine seizure
- C.
Overtemp
- D.
Compressor shift
Correct Answer
A. FlameoutExplanation
The main fuel control is responsible for regulating the fuel flow to the engine, ensuring that it is at the correct level for safe acceleration. By doing so, it prevents a flameout, which is the sudden extinction of the flame in the combustion chamber. A flameout can occur if there is insufficient fuel supply, leading to a loss of power and potentially causing the engine to shut down. Therefore, the main fuel control plays a crucial role in maintaining the engine's stability and preventing flameouts.Rate this question:
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- 4.
The purpose of the fuel oil cooler is to
- A.
Heat the fuel and cool the oil
- B.
Heat the oil and cool the fuel
- C.
Heat the oil and heat the fuel
- D.
Cool the fuel and cool the oil
Correct Answer
A. Heat the fuel and cool the oilExplanation
The purpose of the fuel oil cooler is to heat the fuel and cool the oil. This is important because fuel needs to be heated in order to achieve proper combustion, while oil needs to be cooled to prevent overheating and maintain its lubricating properties. By performing these functions, the fuel oil cooler ensures efficient and safe operation of the engine.Rate this question:
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- 5.
Which type of fuel control uses items such as thermocouples, relays, amplifiers, and solinoids to help control a jet engine?
- A.
Pneumatic
- B.
Fuel injection
- C.
Hydromechanical
- D.
Hydroelectromechanical
Correct Answer
D. HydroelectromechanicalExplanation
Hydroelectromechanical fuel control systems use various components such as thermocouples, relays, amplifiers, and solenoids to regulate and control the fuel flow in a jet engine. These systems combine hydraulic and electromagnetic principles to ensure precise and efficient fuel control. By utilizing these components, the hydroelectromechanical fuel control system can accurately monitor and adjust the fuel flow based on various factors such as engine speed, temperature, and altitude, thereby optimizing the engine's performance.Rate this question:
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- 6.
On fuel controls that require setting during an engine trim , screws must be
- A.
Replaced
- B.
Dye marked
- C.
Safety sealed or lockwired
- D.
Apply a thread locking compound
Correct Answer
C. Safety sealed or lockwiredExplanation
In fuel controls that require setting during an engine trim, screws must be safety sealed or lockwired. This is necessary to ensure that the screws do not loosen or move out of position during operation, which could lead to a malfunction or failure of the fuel control system. Safety sealing or lockwiring involves securing the screws in place using a seal or wire, preventing any unintended movement. This provides an added level of safety and ensures the proper functioning of the engine trim system.Rate this question:
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- 7.
When in primary mode, what controls the operation of the F100 engine?
- A.
Mec
- B.
Pmg
- C.
Deec
- D.
Tsfc
Correct Answer
C. DeecExplanation
The DEEC (Digital Electronic Engine Control) controls the operation of the F100 engine when in primary mode. It is responsible for monitoring and adjusting various engine parameters such as fuel flow, temperature, and pressure. The DEEC uses digital technology to ensure optimal engine performance and efficiency.Rate this question:
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- 8.
On the f100 engine, the MFC is capable of operating in how many modes
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2Explanation
The MFC (Main Fuel Control) on the f100 engine is capable of operating in two modes.Rate this question:
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- 9.
Which F100 engine fuel system component controls pressurization of the core engine fuel system?
- A.
N2 sensor
- B.
P&D valve
- C.
Fuel nozzle
- D.
Fan inlet sensor
Correct Answer
B. P&D valveExplanation
The P&D valve, also known as the Pressure and Drain valve, controls the pressurization of the core engine fuel system. It regulates the fuel pressure within the system to ensure proper fuel flow and delivery to the engine. By maintaining the correct pressure, the P&D valve helps optimize engine performance and fuel efficiency.Rate this question:
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- 10.
Which stage of compressor air drives the augmentor fuel pump on the F100 engine
- A.
7th
- B.
10th
- C.
13th
- D.
14th
Correct Answer
C. 13thExplanation
The correct answer is 13th. In the F100 engine, the augmentor fuel pump is driven by the 13th stage of the compressor. This stage is responsible for providing the necessary power to drive the fuel pump, which is essential for the operation of the augmentor system. The augmentor system is used to increase the thrust of the engine during certain phases of flight, such as takeoff or high-speed maneuvers.Rate this question:
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- 11.
On the F100 enigne, which component controls the augmentor fuel control?
- A.
Fuel pump
- B.
Fuel pump controller
- C.
Signature elimination probe
- D.
DEEC
Correct Answer
D. DEECExplanation
The DEEC (Digital Electronic Engine Control) component controls the augmentor fuel control on the F100 engine. The DEEC is responsible for monitoring and adjusting various engine parameters, including fuel flow, to optimize engine performance. It receives inputs from sensors and makes real-time adjustments to ensure efficient combustion and power output. Therefore, the DEEC is the correct component that controls the augmentor fuel control.Rate this question:
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- 12.
Operational control of the F108 engine is acheived by the use of the power lever, fuel shutoff lever and
- A.
Fuel pump
- B.
Oil heat exchanger
- C.
Air fuel exchanger
- D.
PMC
Correct Answer
D. PMCExplanation
The operational control of the F108 engine is achieved by the use of the power lever, fuel shutoff lever, and PMC (Power Management Computer). The PMC is responsible for monitoring and controlling various parameters of the engine, such as fuel flow, thrust, and temperature. It ensures optimal engine performance by adjusting the fuel-air mixture and other variables as necessary. The fuel pump, oil heat exchanger, and air fuel exchanger are important components of the engine but do not directly control its operation like the PMC does.Rate this question:
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- 13.
The F108 engine fuel pump contains a low pressure stage ( centrifugal boost stage) and a high pressure...
- A.
Gear stage
- B.
Gerotor stage
- C.
Axial boost stage
- D.
Sliding vane stage
Correct Answer
A. Gear stageExplanation
The F108 engine fuel pump contains a gear stage. A gear stage is a type of pump stage that uses gears to increase the pressure of the fuel. Gears are meshed together and as they rotate, they create a pumping action that pressurizes the fuel. This stage is responsible for increasing the pressure of the fuel before it is delivered to the engine for combustion.Rate this question:
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- 14.
On the F108 engine the fuel injectors contain
- A.
Only primary fuel flow passages
- B.
Only secondary fuel flow passages
- C.
Both primary and secondary fuel flow passages
- D.
Primary, secondary, and auxiliary fuel flow passages
Correct Answer
C. Both primary and secondary fuel flow passagesExplanation
The correct answer is both primary and secondary fuel flow passages. This means that the fuel injectors on the F108 engine contain passages for both primary and secondary fuel flow. This is important because primary fuel flow passages deliver fuel directly to the combustion chamber, while secondary fuel flow passages deliver fuel to other parts of the engine for cooling and lubrication purposes. The presence of both types of passages ensures proper fuel distribution and engine performance.Rate this question:
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- 15.
What supplies the AE2100D3 FADEC with power untill the engine RPM is sufficient for the alternator stator to take control?
- A.
Airplane 28 VDC power supply
- B.
NIU
- C.
MIL-STD-1553B data bus
- D.
Mission computer
Correct Answer
A. Airplane 28 VDC power supplyExplanation
The AE2100D3 FADEC is supplied with power by the airplane's 28 VDC power supply until the engine RPM is sufficient for the alternator stator to take control. This means that the airplane's power supply is responsible for providing the necessary power to the FADEC system until the engine reaches a certain RPM level, at which point the alternator stator takes over and provides power.Rate this question:
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- 16.
What component is controled by the AE2100D3 FADEC through the ENGINE START switch for normal engine shutdown or by the fire control handle for emergency shutdown
- A.
Servo valve
- B.
Fuel check vavle
- C.
Electric shutoff valve
- D.
Latching shutoff valve
Correct Answer
D. Latching shutoff valveExplanation
The AE2100D3 FADEC controls the latching shutoff valve through the ENGINE START switch for normal engine shutdown or by the fire control handle for emergency shutdown.Rate this question:
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- 17.
In the T56 engine how many and what type of fuel pumps are contained in the fuel pump
- A.
3 gear 1 boost
- B.
2 gear 2 boost
- C.
2 gear 1 boost
- D.
1 gear 2 boost
Correct Answer
C. 2 gear 1 boostExplanation
The correct answer is "2 gear 1 boost". This means that in the T56 engine, there are two gear-type fuel pumps and one boost-type fuel pump. The gear-type pumps are responsible for delivering fuel to the engine, while the boost-type pump increases the fuel pressure to ensure proper fuel flow.Rate this question:
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- 18.
What T56 engin controls the rotary movement of the fuel control metering vavle
- A.
Temperature
- B.
Engine speed
- C.
Throttle position
- D.
Compressor inlet pressure
Correct Answer
D. Compressor inlet pressureExplanation
The compressor inlet pressure controls the rotary movement of the fuel control metering valve in the T56 engine. This is because the compressor inlet pressure directly affects the amount of air entering the engine, which in turn affects the fuel-air mixture. By adjusting the fuel control metering valve based on the compressor inlet pressure, the engine can maintain the optimal fuel-air ratio for efficient combustion and performance.Rate this question:
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- 19.
On the T56 engine, what compares the desired throttle setting from the coordinator with the actual TIT signal from the thermocouples?
- A.
TD valve
- B.
Speed sensitive control
- C.
TD potentiometers
- D.
TD amplifier
Correct Answer
D. TD amplifierExplanation
The TD amplifier on the T56 engine compares the desired throttle setting from the coordinator with the actual TIT (Turbine Inlet Temperature) signal from the thermocouples. The TD amplifier is responsible for adjusting the fuel flow to maintain the desired engine speed and temperature.Rate this question:
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- 20.
Which T56 engine component sends the fuel to the fuel manifold?
- A.
TD valve
- B.
Main fuel pump
- C.
TD amplifier
- D.
Fuel control
Correct Answer
A. TD valveExplanation
The TD valve is the engine component that sends the fuel to the fuel manifold.Rate this question:
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- 21.
When the null orifice on the T56 engine TD valve is set to zero, how much fuel will the valve bypass?
- A.
0%
- B.
10%
- C.
20%
- D.
30%
Correct Answer
C. 20%Explanation
When the null orifice on the T56 engine TD valve is set to zero, it means that there is no bypass for fuel. Therefore, the valve will not bypass any fuel, resulting in 0% fuel being bypassed.Rate this question:
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- 22.
In addition to the visual inspection the T56 engine fuel nozzle also requires what type of inspection
- A.
Nondestructive
- B.
Spray pattern
- C.
Pre-torque
- D.
Ultrasonic
Correct Answer
B. Spray patternExplanation
The T56 engine fuel nozzle requires a spray pattern inspection in addition to visual inspection. This means that apart from visually inspecting the nozzle, it is also necessary to inspect the spray pattern of the fuel being emitted from the nozzle. This is important to ensure that the fuel is being sprayed evenly and efficiently, as any irregularities in the spray pattern can affect the engine's performance.Rate this question:
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- 23.
Which type of oil cooler operates on the ame principles as a car radiator
- A.
Air
- B.
Fuel
- C.
Hydraulic
- D.
Pneumatic
Correct Answer
A. AirExplanation
An air oil cooler operates on the same principles as a car radiator. Just like a car radiator, an air oil cooler uses air as the cooling medium to dissipate heat from the oil. It consists of a series of fins or tubes through which the oil flows, and air is forced over these fins or tubes to cool the oil. This process is similar to how a car radiator cools the engine coolant by passing air through its fins. Therefore, the correct answer is air.Rate this question:
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- 24.
When an engine is not operating, static preload for a carbon seal is provided by
- A.
Air pressure
- B.
Spring pressure
- C.
Oil pressure
- D.
Hydraulic pressure
Correct Answer
B. Spring pressureExplanation
When an engine is not operating, the static preload for a carbon seal is provided by spring pressure. This means that the carbon seal is compressed and held in place by a spring, creating a tight seal between two components. The spring pressure ensures that there is enough force to maintain the seal even when the engine is not running and there is no air pressure, oil pressure, or hydraulic pressure available to provide the preload.Rate this question:
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- 25.
The F100 engine oil pressure varies with N2 speed, engine inlet oil temperature, and
- A.
Oil jet pressure
- B.
Fan turbine speed
- C.
Oil nozzle condition
- D.
Number of oil jets used
Correct Answer
C. Oil nozzle conditionExplanation
The oil nozzle condition affects the F100 engine oil pressure. The condition of the oil nozzle, which is responsible for delivering oil to various parts of the engine, can impact the pressure of the oil. If the oil nozzle is damaged or clogged, it may restrict the flow of oil, leading to lower oil pressure. On the other hand, if the oil nozzle is in good condition and functioning properly, it can ensure a steady and appropriate oil pressure for the F100 engine.Rate this question:
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- 26.
What term is used to indicated that air is being mixed with the oil in the oil pump to creat pockets of air
- A.
Aeration
- B.
Induction
- C.
Convestion
- D.
Compression
Correct Answer
A. AerationExplanation
Aeration is the correct term used to indicate that air is being mixed with the oil in the oil pump to create pockets of air. Aeration occurs when air is introduced into the oil system, which can lead to reduced lubrication and potential damage to the engine or machinery. This can happen due to factors such as foaming, cavitation, or inadequate sealing.Rate this question:
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- 27.
In the engine oil tank, which device seperates the air from the oil
- A.
Aeration
- B.
Deaeration
- C.
Check vavle
- D.
Bypass valve
Correct Answer
B. DeaerationExplanation
The correct answer is deaeration. In an engine oil tank, the deaeration device is responsible for separating air from the oil. This helps to prevent air bubbles from forming in the oil, which can cause issues with lubrication and potentially damage the engine. Deaeration ensures that the oil remains free of air, allowing it to effectively lubricate the engine components.Rate this question:
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- 28.
Which type of oil system stores the oil in a tank fitted to the side the engine
- A.
Wet sump
- B.
Dry sump
- C.
Hot tank
- D.
Cold tank
Correct Answer
B. Dry sumpExplanation
A dry sump oil system is a type of oil system that stores the oil in a separate tank, typically located outside of the engine. This system uses an external pump to circulate the oil from the tank to the engine, and then returns the oil back to the tank. By separating the oil storage from the engine, a dry sump system allows for better oil control and lubrication, especially in high-performance engines or those with limited space. In contrast, a wet sump system stores the oil directly in the engine's oil pan, while hot and cold tanks are not commonly used in oil systems.Rate this question:
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- 29.
Which type of oil system design places the oil cooler in the pressure subsystem?
- A.
Wet tank
- B.
Dry tank
- C.
Hot tank
- D.
Cold tank
Correct Answer
C. Hot tankExplanation
The hot tank oil system design places the oil cooler in the pressure subsystem. This means that the oil cooler is located within the high-pressure area of the system, allowing it to cool the oil as it flows under pressure. This design helps to maintain optimal oil temperature and prevent overheating of the system. In contrast, the other options (wet tank, dry tank, and cold tank) do not specifically place the oil cooler in the pressure subsystem.Rate this question:
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- 30.
On the F100 engine, the breather pressurizing valve is internally mounted in the
- A.
Oil tank
- B.
Gearbox
- C.
Oil filter
- D.
Oil pump
Correct Answer
B. GearboxExplanation
The breather pressurizing valve on the F100 engine is internally mounted in the gearbox. This means that the valve is located within the gearbox itself. The purpose of the breather pressurizing valve is to regulate the pressure inside the gearbox, ensuring that it remains at the appropriate level. By being internally mounted, the valve can effectively control the pressure within the gearbox, which is important for the proper functioning and performance of the engine.Rate this question:
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- 31.
On an F100 engine , the air/oil coolers are mounted on the fan duct and use
- A.
Secondary fan airflow as a coolant
- B.
Secondary fan airflow as an oil heater
- C.
Primary core engine airflow as a coolant
- D.
Primary core engine airflow as an oil heater
Correct Answer
A. Secondary fan airflow as a coolantExplanation
The air/oil coolers on an F100 engine are mounted on the fan duct and use secondary fan airflow as a coolant. This means that the coolers are positioned in such a way that they receive air from the secondary fan, which helps in cooling the air and oil in the engine. By utilizing the secondary fan airflow as a coolant, the coolers are able to effectively regulate the temperature of the engine, ensuring optimal performance and preventing overheating.Rate this question:
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- 32.
On the F100 engine, what component permits oil to bypass the filter during cold weather starts
- A.
Oil relief valve
- B.
Filter bypass valve
- C.
Filter poppet valve
- D.
Oil pressure transmitter tap
Correct Answer
B. Filter bypass valveExplanation
The correct answer is filter bypass valve. During cold weather starts, the oil in the engine may be too thick to flow through the filter effectively. The filter bypass valve allows the oil to bypass the filter temporarily, ensuring that the engine receives an adequate supply of oil for lubrication and protection. This helps to prevent damage to the engine during cold starts when the oil is not flowing smoothly.Rate this question:
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- 33.
What is used to check the oil level in a F108 engine
- A.
Sight gauge on the oil tank
- B.
Flight station oil level gauge
- C.
Filler cap with a graduated gauge
- D.
Graduated marking on the outside of the tank
Correct Answer
C. Filler cap with a graduated gaugeExplanation
The correct answer is "filler cap with a graduated gauge." This means that the oil level in a F108 engine can be checked by using a filler cap that has a gauge with graduated markings. This allows the user to visually determine the oil level by observing the position of the gauge on the filler cap.Rate this question:
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- 34.
Aproximatly how many GPM does the AE2100D3 PUAD lube and scavange pump provide at engine PTO
- A.
3
- B.
5
- C.
7
- D.
9
Correct Answer
B. 5Explanation
The AE2100D3 PUAD lube and scavange pump provides approximately 5 gallons per minute (GPM) at engine PTO.Rate this question:
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- 35.
What AE2100D3 component drives the PGB lube and scavange pump?
- A.
Alternator stator
- B.
PGB
- C.
PUAD
- D.
GMAD
Correct Answer
D. GMADExplanation
The GMAD (Gearbox Mounted Accessory Drive) is the component that drives the PGB (Power Gearbox) lube and scavange pump. The GMAD is responsible for providing power to various accessories in the engine, including the PGB pump which helps in lubricating and scavenging the gearbox.Rate this question:
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- 36.
Which type of oil pump is used on the T56 engine
- A.
Gear
- B.
Float
- C.
Gerotor
- D.
Centrifulgal
Correct Answer
A. GearExplanation
The correct answer is "Gear". In the T56 engine, a gear oil pump is used. This type of oil pump utilizes gears to create suction and pressure, effectively circulating the oil throughout the engine. Gear oil pumps are commonly used in automotive engines due to their reliability and efficiency in delivering oil to the various components that require lubrication.Rate this question:
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- 37.
The amount of Ram air passing through the oil cooler core is regulated by the
- A.
Thermostat
- B.
Flap actuator
- C.
Size of the core
- D.
Regulating valve
Correct Answer
B. Flap actuatorExplanation
The flap actuator is responsible for regulating the amount of Ram air passing through the oil cooler core. It controls the opening and closing of the flap, which in turn adjusts the airflow. The size of the core and the regulating valve may have an impact on the overall functioning of the oil cooler, but they do not directly regulate the amount of air passing through it. Therefore, the flap actuator is the correct answer.Rate this question:
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- 38.
Bleed air flowing through which component increases air flow through the cooler?
- A.
Flap actuator
- B.
Oil cooler flap
- C.
Augmentation valve
- D.
Augmentation ejector
Correct Answer
D. Augmentation ejectorExplanation
The augmentation ejector is the component through which bleed air flowing increases air flow through the cooler.Rate this question:
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- 39.
The valve that allows fluid to flow in only one direction is the
- A.
Check
- B.
Relief
- C.
Bypass
- D.
Pressurizing
Correct Answer
A. CheckExplanation
The valve that allows fluid to flow in only one direction is called a check valve. This type of valve is designed to prevent backflow or reverse flow of fluid in a piping system. It opens when the fluid flows in the desired direction and closes automatically to prevent any backward flow. Check valves are commonly used in various applications such as plumbing, irrigation systems, and industrial processes to ensure the proper and controlled flow of fluids.Rate this question:
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- 40.
In the power unit oil system, the dual port oil jet mounted on the front side of the compressor air inlet housing is used to lubricate the
- A.
Mid and center sleeve bearings
- B.
Torque meter and compressor front bearings
- C.
Front and rear sides of the compressor rear bearing
- D.
Front and rear sides of the compressor front bearing
Correct Answer
A. Mid and center sleeve bearingsExplanation
The dual port oil jet mounted on the front side of the compressor air inlet housing is used to lubricate the mid and center sleeve bearings.Rate this question:
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- 41.
The power section and RGB oil systems are joined together at the
- A.
Fuel heater and strainer
- B.
External scavenge oil filter
- C.
External scavenge oil pump
- D.
Scavenge element of the main pump
Correct Answer
B. External scavenge oil filterExplanation
The external scavenge oil filter is the correct answer because it is the component that joins the power section and RGB oil systems together. It is responsible for filtering the oil and removing any contaminants before it is recirculated back into the system. This ensures that the oil remains clean and free from any debris that could potentially cause damage to the engine or other components.Rate this question:
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- 42.
Which RGB component prevents oil in the oil tank from draining into the RGB rear case?
- A.
Shutoff valve
- B.
Oil pump and filter
- C.
Oil pump check valve
- D.
Oil pump bypass valve
Correct Answer
C. Oil pump check valveExplanation
The oil pump check valve prevents oil in the oil tank from draining into the RGB rear case. This valve ensures that oil flows in one direction only, allowing it to be pumped into the necessary components of the system while preventing any backflow into the RGB rear case.Rate this question:
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- 43.
How many scavange oil pumps are located in the RGB
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2Explanation
The correct answer is 2 because the question asks for the number of scavange oil pumps located in the RGB. The given answer indicates that there are two such pumps present in the RGB.Rate this question:
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- 44.
The Journeyman must be aware of which hazardous property of modern jet engine oil
- A.
Toxcicity
- B.
Viscosity
- C.
Alkalinity
- D.
Corrosiveness
Correct Answer
D. CorrosivenessExplanation
The Journeyman must be aware of the corrosiveness of modern jet engine oil. This is because corrosiveness refers to the ability of a substance to cause damage or deterioration to materials it comes into contact with. In the case of jet engine oil, which is used in high-performance engines, corrosiveness can lead to the degradation of engine components and potentially compromise the safety and performance of the aircraft. Therefore, it is crucial for the Journeyman to understand this hazardous property and take appropriate measures to prevent corrosion and ensure the proper functioning of the engine.Rate this question:
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- 45.
The primary benefit of identifying an impending failure through OAP is
- A.
Improved safety
- B.
Increased component life
- C.
Reduced maintenance cost
- D.
Increased equipment availability
Correct Answer
A. Improved safetyExplanation
Identifying an impending failure through OAP (Operational Awareness Program) helps in improving safety by allowing timely intervention and preventive measures. By identifying potential failures beforehand, necessary actions can be taken to mitigate risks and prevent accidents or injuries. This ensures a safer working environment for personnel and minimizes the chances of any hazardous incidents.Rate this question:
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- 46.
Who is responsible for ensuring that the OAP operates properly
- A.
Project monitor
- B.
Logistics commander
- C.
Propulsion flight cheif
- D.
Laboratory supervisor
Correct Answer
A. Project monitorExplanation
The project monitor is responsible for ensuring that the OAP (presumably referring to an Operational Analysis Plan) operates properly. They oversee the progress and execution of the project, monitor its performance, and ensure that it aligns with the objectives and requirements. The project monitor acts as a point of contact for stakeholders, manages risks, and ensures that the project stays on track.Rate this question:
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- 47.
What are microscopic metallic particles in the oil system called?
- A.
Wear metals
- B.
Friction metals
- C.
Precious metals
- D.
Transformation metals
Correct Answer
A. Wear metalsExplanation
Microscopic metallic particles in the oil system are referred to as wear metals. These particles are generated as a result of friction and wear between moving parts in the system. Over time, these wear metals can cause damage to the components and reduce the efficiency of the system. Therefore, monitoring and controlling the levels of wear metals in the oil system is important for maintaining the performance and longevity of the machinery.Rate this question:
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- 48.
Oil sampling intervals should not vary by more than
- A.
5 %
- B.
10 %
- C.
15 %
- D.
20 %
Correct Answer
B. 10 %Explanation
The correct answer is 10%. This means that the intervals at which oil sampling is conducted should not vary by more than 10%. It is important to maintain consistency in oil sampling intervals to ensure accurate and reliable results. If the intervals vary too much, it can lead to inconsistent data and potentially miss important changes or issues in the oil's condition. Therefore, a maximum variation of 10% is recommended to ensure the effectiveness of oil sampling.Rate this question:
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- 49.
The SEM/EDX analysis process differs from the conventional oil analysis in which major aspect
- A.
Samples must be sent off-site for analysis
- B.
Particles must be free of oil for analysis to take place
- C.
Provides results concerning equipment and components condition
- D.
Samples can only be obtained in an intermediate maintenance shop
Correct Answer
B. Particles must be free of oil for analysis to take placeExplanation
SEM/EDX analysis is a technique used to analyze the composition of particles. Unlike conventional oil analysis, where samples are sent off-site for analysis, SEM/EDX analysis can be performed on-site. However, for accurate analysis to take place, the particles being analyzed must be free of oil. This is because oil can interfere with the analysis and affect the results. Therefore, ensuring that the particles are free of oil is a major aspect of the SEM/EDX analysis process. This allows for accurate and reliable results concerning the condition of equipment and components to be obtained.Rate this question:
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- 50.
What is the term for the process of producing voltage in a conductor when it passes through a magnectic feild
- A.
Static
- B.
Electronics
- C.
Mutual induction
- D.
Electromagnetic induction
Correct Answer
D. Electromagnetic inductionExplanation
Electromagnetic induction refers to the process of generating voltage in a conductor when it moves through a magnetic field. This phenomenon was first discovered by Michael Faraday in the 19th century and is the fundamental principle behind the operation of generators, transformers, and many other electrical devices. It involves the creation of an electric current in a conductor due to the changing magnetic field it experiences, leading to the production of voltage.Rate this question:
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Aug 06, 2024Quiz Edited by
ProProfs Editorial Team -
Sep 07, 2009Quiz Created by
Wafbprops
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