Question 1

Compression ignition engine

Accepted Answer

Also known as a diesel engine, it ignites fuel through compression rather than spark plugs.

Question 2

Torque

Accepted Answer

A measure of rotational force produced by the engine.

Question 3

Combustion chamber

Accepted Answer

The area where fuel and air mix and burn inside the engine.

Question 4

Glow plug

Accepted Answer

A heating element used to assist in starting a diesel engine.

Question 5

Fuel injection system

Accepted Answer

A mechanism that injects fuel into the combustion chamber at the right time and in the correct quantity.

Question 6

Turbocharger

Accepted Answer

A device that increases engine power by compressing the incoming air.

Question 7

Intercooler

Accepted Answer

A component that cools down the compressed air before it enters the engine.

Question 8

Intake manifold

Accepted Answer

The pathway that delivers air to the combustion chamber.

Question 9

Exhaust manifold

Accepted Answer

Collects and directs exhaust gases away from the engine.

Question 10

Cylinder head

Accepted Answer

The top part of the engine where the combustion process takes place.

Question 11

Piston

Accepted Answer

A cylindrical component that moves up and down inside the cylinder, driven by the expanding gases.

Question 12

Connecting rod

Accepted Answer

Connects the piston to the crankshaft, converting linear motion into rotational motion.

Question 13

Crankshaft

Accepted Answer

Converts the up-and-down motion of the pistons into rotational motion.

Question 14

Engine block

Accepted Answer

The main structural component of the engine that houses the cylinders and other internal parts.

Question 15

Cylinder liner

Accepted Answer

A replaceable sleeve that provides a smooth surface for the piston to move in.

Question 16

Fuel filter

Accepted Answer

Removes impurities from the fuel before it enters the engine.

Question 17

Oil filter

Accepted Answer

Removes contaminants from the engine oil to prevent damage to engine components.

Question 18

Water pump

Accepted Answer

Circulates coolant through the engine to maintain optimal operating temperature.

Question 19

Alternator

Accepted Answer

Generates electrical power to charge the battery and run electrical systems.

Question 20

Starter motor

Accepted Answer

Electric motor used to start the engine by cranking the crankshaft.

Question 21

Camshaft

Accepted Answer

Controls the opening and closing of the engine valves.

Question 22

Valve clearance

Accepted Answer

The gap between the valve stem and rocker arm that affects valve operation.

Question 23

Timing belt

Accepted Answer

Synchronizes the rotation of the camshaft and crankshaft.

Question 24

Glow plug controller

Accepted Answer

Controls the operation of the glow plugs during engine start-up.

Question 25

Fuel pressure regulator

Accepted Answer

Regulates the pressure of fuel delivered to the fuel injectors.

Question 26

EGR (Exhaust Gas Recirculation) valve

Accepted Answer

Recirculates a portion of exhaust gases back into the engine to reduce emissions.

Question 27

Throttle position sensor

Accepted Answer

Monitors the position of the accelerator pedal to adjust engine performance.

Question 28

Fuel pump

Accepted Answer

Supplies fuel to the engine at the required pressure.

Question 29

Oil pressure sensor

Accepted Answer

Monitors the oil pressure to ensure proper lubrication of engine components.

Question 30

Engine coolant temperature sensor

Accepted Answer

Monitors the temperature of the engine coolant.

Question 31

Crankshaft position sensor

Accepted Answer

Provides information about the position and speed of the crankshaft.

Question 32

Air filter

Accepted Answer

Removes dust and debris from the air before it enters the engine.

Question 33

Fuel tank

Accepted Answer

Stores the diesel fuel until it is needed by the engine.

Question 34

Viscosity

Accepted Answer

A measure of a fluid's resistance to flow.

Question 35

Glow plug relay

Accepted Answer

Controls the operation of the glow plugs based on engine conditions.

Question 36

Injection pump

Accepted Answer

Delivers pressurized fuel to the fuel injectors.

Question 37

Valve overlap

Accepted Answer

The period of time when both the intake and exhaust valves are open.

Question 38

Crankcase ventilation system

Accepted Answer

Removes blow-by gases from the crankcase to prevent pressure buildup.

Question 39

Cylinder head gasket

Accepted Answer

Seals the cylinder head to the engine block, preventing leakage.

Question 40

Engine governor

Accepted Answer

Regulates the engine speed and prevents overspeeding.

Question 41

Preheating system

Accepted Answer

Provides additional heat to the engine, fuel, or intake air in cold weather conditions for improved starting and operation.

Question 42

Injection timing

Accepted Answer

Determines when fuel is injected into the combustion chamber in relation to piston position.

Question 43

Air-to-fuel ratio

Accepted Answer

The ratio of air mass to fuel mass in the combustion chamber.

Question 44

Compression ratio

Accepted Answer

The ratio of the cylinder's volume at the bottom of the piston stroke to its volume at the top of the stroke.

Question 45

Oil viscosity rating

Accepted Answer

A measure of an oil's resistance to flow at different temperatures.

Question 46

Valve clearance adjustment

Accepted Answer

The process of setting the correct gap between the valve stem and rocker arm for proper valve operation.

Question 47

Fuel system bleeding

Accepted Answer

Removing air from the fuel system to ensure uninterrupted fuel flow.

Question 48

Cylinder head bolt torque

Accepted Answer

The specified tightening torque for the cylinder head bolts to ensure proper sealing.

Question 49

Engine block heater

Accepted Answer

An electric heating element installed in the engine to warm the coolant and facilitate easier starting in cold temperatures.

Question 50

Fuel lift pump

Accepted Answer

Draws fuel from the tank and supplies it to the injection pump.

Question 51

Injection pump timing

Accepted Answer

Setting the precise timing of fuel injection in relation to engine position.

Question 52

Turbocharger wastegate

Accepted Answer

Controls the amount of exhaust gas flow to the turbocharger to regulate boost pressure.

Question 53

Fuel system priming

Accepted Answer

Filling the fuel system with fuel and removing air to enable the engine to start.

Question 54

Cooling system thermostat

Accepted Answer

Regulates the flow of coolant to maintain optimal engine operating temperature.

Question 55

Crankshaft end play

Accepted Answer

The amount of axial movement allowed for the crankshaft.

Question 56

Fuel injector nozzle

Accepted Answer

Delivers fuel into the combustion chamber in a precise spray pattern.

Question 57

Camshaft position sensor

Accepted Answer

Monitors the position of the camshaft to ensure proper valve timing.

Question 58

High-pressure fuel pump

Accepted Answer

Supplies pressurized fuel to the fuel injectors at high pressure.

Question 59

Fuel shutoff solenoid

Accepted Answer

Electrically controlled valve that shuts off the fuel supply to the injectors.

Question 60

Glow plug relay timer

Accepted Answer

Controls the duration of glow plug operation during engine start-up.

Question 61

Engine oil capacity

Accepted Answer

The total amount of oil required to fill the engine's lubrication system.

ASE Military Tactical Wheeled Vehicle Certification - MIL2 Diesel Engines Flashcard Set