AUTO INFORMATION ASVAB EXAM QUESTIONS

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AUTO INFORMATION ASVAB EXAM QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -80 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Ignition System

Answer:

The key components of the ignition system are the breaker points, the coil, the distributor cap, and the distributor rotor

Question 2: Power Assisted Steering

Answer:

Generally larger cars have power steering; power steering can provide varying levels of assistance through the use of a hydraulic system that runs off of power steering fluid.

Question 3: Partially Burned Hydrocarbons

Answer:

In large quantities, small pieces of hydrocarbon make black soot that you can see Question 4: In Carburetor the exact ratio of air to fuel is critical to performance

Answer:

a mixture with too much fuel, aka "rich mixture", will waste gas and increase pollution, a mixture with too little fuel, aka "lean mixture", will burn to hot and be short on performance

Question 5: Lubrication System

Answer:

Engines have a complicated set of tubes and internal passages that bring oil to the contact points. A gear driven oil pump pushes oil through these passages. Oil also splashes onto the cylinder walls, lubricating the piston rings and making compression more effective.

Question 6: If you have ever tried to start a car that was already running

Answer:

you've heard a loud grinding noise. This racket comes from the starter-motor gear clashing against the spinning wheel.

Question 7: Fuel System

Answer:

contains the fuel tank, the fuel filter, and the carburetor or fuel injector

Question 8: Differential 3 jobs

Answer:

• Allow different (differential) movement of the two axels, so that the car can turn a

corner

• Change drive directions. In rear-wheel-drive cars, the differential connects to the

drive shaft that runs from front to back and powers the axels, which run from side to side.

• Increase Power. The differential usually reduces the drive speed, so that three to

four input revolutions create one turn of the axels.

Question 9: Shock Absorbers

Answer:

prevents the axels from bouncing back when the wheels encounter a severe decline or incline, which makes for a safer, more controllable, and comfortable ride

Question 10: General information

Answer:

Cars use internal combustion engines, meaning the fuel is burned inside the engine. Steam engines are the opposite they are external combustion engines meaning the fuel is burned outside the engine. All car engines to include diesel engines utilize the Otto Cycle

Question 11: 2. Otto cycle engine- Compression

Answer:

Both valves are closed. The piston moves up, compressing the fuel-air mixture to about ten times atmospheric pressure.

Question 12: Engine Control Unit (ECU)

Answer:

auto engines are currently run by the ECU which is a small computer system within the car often referred to as the brains of the car

Question 13: 3. Otto cycle engine- Power

Answer:

The spark plugs fire, starting an explosion inside the cylinder. The resulting high pressure pushes the piston down

Question 14: Fuel Injector

Answer:

electronically controlled valves that squirt fuel into the cylinder. The valve is closed until the injector receives an electric current and an electromagnet opens the valve. Fuel sprays into the cylinder until the valve closes.

Question 15: Clutch

Answer:

disconnects the engine from the transmission, so that you can shift gears. The clutch is engaged when the clutch pedal is up and disengaged when the pedal is down

Question 16: Distributor Cap and Rotor

Answer:

direct the high voltage current to the spark plugs

Question 17: Cylinder and Piston

Answer:

The cylinder is the heart of the internal combustion engine, since it is where the combustion takes place.The cylinder is a finely machined chamber that holds a piston as it slides up and down. Thin rings called piston rings seal the gap between the cylinder and the piston, containing the explosions and increasing efficiency

Question 18: Differential

Answer:

When a car turns a corner, the outside wheels must drive further than the inside wheels. If both driving wheels were locked to the axel, the tires would be forced to slip against the pavement. The differential solves this problem.

Question 19: Firing Order

Answer:

to make the engine run more smoothly, nearby cylinders do not ignite in sequence, rather the engine's firing order is spread amongst the engine

Question 20: Radiator Fan

Answer:

pulls air through the radiator, removing heat from the tubes.Question 21: The drive train must:

Answer:

• Provide different gears so that the engine can always work at an efficient RPM, no matter what the

driving speed.

• Allow the car to move in reverse.

• Allow the engine to run when the car is not moving.

• Drive two or four wheels.

• Allow the car to turn without tire slippage.

Question 22: Viscosity

Answer:

measures the thickness of the oil. Measured by S.A.E. numbers which range from very light SAE 5 to SAE 90, typically for regular driving oil is rated at SAE 30 to 40.

Question 23: Disk Brakes notes

Answer:

• Over time, pads wear out. Many disk brakes make a warning noise when the pads

are wearing out. You usually will hear the noise when your foot is not on the brake pedal.