ASVAB ASVAB Certifications ASVAB-SECTION-4 Questions & Answers

• Question 101:

  What gear is the transmission in when the engine is driving the car directly?

  A. first gear

  B. second gear

  C. third gear

  D. fourth gear

  Correct Answer: C

  In a three-speed car first gear is used to get the car moving.

  Second gear is used to get it moving a little fester.

  Then it is placed in third gear when it has reached a higher speed and needs less power to make it move

  even fester. When the third gear is engaged, no gear reduction is taking place and the engine speed is

  reflected in the speed at which the wheels turn.

• Question 102:

  When the clutch is engaged on a manual transmission, the clutch pedal will be __________.

  A. down

  B. up

  C. halfway down

  D. halfway up

  Correct Answer: B

  The clutch pedal is pushed to the floorboard in order to release the engine from the drive train. Once the pedal is released and spring action returns it to the upward position, the clutch is engaged and the engine is connected to the drive train again.

• Question 103:

  If the universal joints are broken and the car is standing still, the car will __________.

  A. not move when the engine is revved up

  B. increase in speed

  C. work as usual

  D. become impossible to push

  Correct Answer: A

  Universal joints are needed to allow the drive shaft to flex when the car goes over a bump in the road. If the universal joints are broken, the car will be unable to move since the drive shaft will not be connected to the power source.

• Question 104:

  When a spark plug fires, it is part of the __________.

  A. power stroke

  B. exhaust stroke

  C. intake stroke

  D. compression stroke

  Correct Answer: A

  The spark plug fires, driving the piston downward to produce power.

  The intake stroke allows the fuel and air mixture to enter the cylinder.

  The compression stroke compresses the air/fuel mixture.

  The exhaust stroke allows the burnt gases to be removed from the cylinder.

• Question 105:

  Most automobile engines are __________.

  A. two-stroke cycle engines

  B. three-stroke cycle engines

  C. four-stroke cycle engines

  D. six-stroke cycle engines

  Correct Answer: C

  Lawn mowers and outboard engines are two-cycle. They are used wherever horsepower is needed in a lightweight package. They run very fast in order to produce power. Four-cycle engines are used in automobiles, where various conditions exist and load variations are greater. One exception is the rotary or Wankel engine, which uses a rotary design to convert pressure into rotating motion instead of using reciprocating pistons.

• Question 106:

  There are four types of fuel injection used in cars today. They are throttle body injection, multi-port injection, direct injection, and __________.

  A. a manual continuous electronic flow injection

  B. sequential fuel injection

  C. automatic circuitous injection

  D. manual intermittent injection

  Correct Answer: B

  The four types of fuel injection used in cars today are throttle body injection, multi-port injection, direct injection, and sequential fuel injection.

• Question 107:

  The flywheel is attached to the __________.

  A. crankshaft

  B. carburetor

  C. radiator

  D. differential

  Correct Answer: A

  The flywheel is used to keep the engine running smoothly inasmuch as it has a tendency to smooth out the individual power surges generated by the various cylinders firing the fuel charge. The flywheel is attached to the crankshaft.

• Question 108:

  The piston of an internal combustion engine fits inside the __________.

  A. crankshaft

  B. cylinder

  C. radiator

  D. brake drum

  Correct Answer: B

  The piston is the object inside the engine that moves up and down inside the cylinder to produce the power needed.

• Question 109:

  A finishing nail has a than a common nail __________.

  A. larger head and larger diameter

  B. larger head and smaller diameter

  C. smaller head and smaller diameter

  D. smaller head and larger diameter

  Correct Answer: C

  A finishing nail has a smaller head and smaller diameter than a common nail.

• Question 110:

  Uncontrolled, rapid drying of wood (for instance, lumber) causes __________.

  A. warping

  B. harmless discoloration, unless it's green, which indicates rot

  C. checking and cracking

  D. an increase in wood strength

  Correct Answer: C

  Uncontrolled, rapid drying of wood (for instance, lumber) causes checking and cracking. This is why new lumber sometimes is kept submerged in water until it's time for it to be cut.