1.
A potato cannon can also be called
Correct Answer
C. Spud gun
Explanation
The correct answer is "Spud gun." A potato cannon is a device that launches potatoes using compressed air or combustion. It is commonly referred to as a spud gun because it shoots spuds (potatoes). The terms "potato shooter," "spud shooter," and "spud cannon" are also used to describe this type of weapon. However, "Spud gun" is the most commonly used and recognized term for this device.
2.
Potato cannons were first used in the
Correct Answer
B. World War 2
Explanation
Potato cannons were not used in World War 1, the American Civil War, or the Napoleon War. However, they were first used in World War 2. This war saw the development and use of various unconventional weapons, including potato cannons. These cannons were homemade devices that used compressed air or combustion to launch potatoes at high speeds. They were used by both military forces and civilians for various purposes, such as training exercises, entertainment, and even as makeshift weapons in some cases.
3.
The following are ways by which weapons are propelled from potato cannons except
Correct Answer
D. Bomb launcher
Explanation
The given options list different ways by which weapons are propelled from potato cannons. Combustion launcher and pneumatic launcher are commonly used methods where combustion or compressed air is used to propel the weapon. Dry ice bomb is another method where the explosive force of dry ice is utilized. However, bomb launcher is not a method commonly used to propel weapons from potato cannons. Therefore, the correct answer is bomb launcher.
4.
The following are elements of combustion launchers except
Correct Answer
B. Combustion gauge
Explanation
Combustion gauge is not an element of combustion launchers because it does not play a role in the actual combustion process. The fuel system is responsible for delivering the fuel to the combustion chamber, the combustion chamber is where the fuel is burned, and the ignition source is used to initiate the combustion process. However, a combustion gauge is not necessary for the functioning of a combustion launcher as it does not contribute to the combustion process itself.
5.
The following are components of pneumatic launchers except
Correct Answer
B. Pressure release gauge
Explanation
The pressure release gauge is not a component of pneumatic launchers. It is used to measure and display the pressure inside the air chamber or barrel, but it is not a physical component of the launcher itself. The other components listed, such as the filling valve, air chamber, and barrel, are all necessary parts of a pneumatic launcher.
6.
Hybrid launchers consist of how many elements?
Correct Answer
C. 7
Explanation
Hybrid launchers consist of 7 elements.
7.
Which of the following is not an element of hybrid launchers?
Correct Answer
D. Ignition knob
Explanation
The ignition knob is not an element of hybrid launchers. Hybrid launchers typically consist of a barrel, air filling valve, and a combustion chamber. The ignition knob is not necessary for the functioning of a hybrid launcher as it is used to initiate the ignition process, which is not relevant in the context of hybrid launchers.
8.
Vacumm cannons are different because they engage
Correct Answer
C. Negative pressure
Explanation
Vacuum cannons are different because they engage negative pressure. This means that instead of creating pressure to propel an object, vacuum cannons create a vacuum or an area of low pressure. This difference allows vacuum cannons to launch objects using suction rather than force, making them unique compared to cannons that rely on high pressure to propel projectiles.
9.
The following are metals used in potato cannons except
Correct Answer
D. Zinc
Explanation
Zinc is not used in potato cannons because it is a relatively soft metal and may not withstand the pressure and force generated during the explosion. Copper, aluminium, and steel are commonly used in potato cannons due to their strength and durability.
10.
The following are types of valves used in pneumatic cannons except
Correct Answer
B. Chain valve
Explanation
The given answer, "Chain valve," is correct because it is the only type of valve listed that is not commonly used in pneumatic cannons. Piston valves, diaphragm valves, and burst disk valves are all commonly used in pneumatic cannons to control the flow of air or gas. However, a chain valve is not typically used in this context.