ASVAB Automotive Information Practice Test 555375 Results

Your Results Global Average
Questions 5 5
Correct 0 3.01
Score 0% 60%

Review

1

Which of the following maintains pressure in the cooling system?

61% Answer Correctly

water pump

radiator cap

thermostat

water jacket


Solution

The radiator is responsible for tranferring heat from the coolant to the outside air. Radiator hoses transfer coolant to and from the engine to the radiator and a radiator cap maintains pressure in the cooling system to increase the boiling point of the coolant mixture and thus allow it to absorb more heat.


2

Which of the following statements about v-type cyllinder arrangement is false?

65% Answer Correctly

common in motorcycles, cars, and trucks

has an odd number of cylinders

engine is shorter than an inline engine

has two rows of cylinders


Solution

A v-arrangement has two rows of cylinders in a V-shaped block with a crankshaft at the bottom of the V. Any even number of cylinders is possible in this configuration from the V-2 that's commonly used in motorcycles up to V-12 or bigger for large trucks. The V design produces a shorter engine than an in-line cylinder configuration and allows for better air-fuel distribution.


3

The ignition coil is a(n):

63% Answer Correctly

step-up transformer

step-down transformer

amplifier

filter


Solution

The ignition coil steps up the 12 volts available from the battery or alternator to a voltage of 30,000 or more volts at the spark plug. Converting a lower voltage input into a higher voltage output makes the ignition coil a step-up transformer.


4

What is the function of the alternator?

59% Answer Correctly

replaces the electrical energy that the car draws from the battery

provides AC power for the car's electrical components

charges the battery when the car is not running

converts motion from the wheels into DC power


Solution

An automobile's electrical system runs on DC power and the bulk of that power is supplied by the battery. The alternator converts the motion of the rotor into AC power which is then fed through the rectifier to convert it to DC power that both the car and the battery can use.


5

Which of the following statements about fuel injection is false?

52% Answer Correctly

optimizes fuel delivery using various electronic engine sensors

atomizes fuel using high pressure and injects it into the engine

has replaced the carburetor as the primary fuel delivery system used in automotive engines

relies on suction to draw fuel into the engine


Solution

Fuel injection has replaced the carburetor as the primary automobile fuel delivery system. The main difference between the fuel injector and the carburetor is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure while a carburetor relies on suction to draw fuel into an accelerated intake air stream.