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  5. ASVAB Section 7: General Science

Free ASVAB Section 7: General Science Exam Braindumps (page: 28)

Page 27 of 97
PDF with 386 Questions

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

  1. power stroke
  2. exhaust stroke
  3. intake stroke
  4. compression stroke

Answer(s): A

Explanation:

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.



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

  1. not move when the engine is revved up
  2. increase in speed
  3. work as usual
  4. become impossible to push

Answer(s): A

Explanation:

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.



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

  1. down
  2. up
  3. halfway down
  4. halfway up

Answer(s): B

Explanation:

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.



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

  1. first gear
  2. second gear
  3. third gear
  4. fourth gear

Answer(s): C

Explanation:

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.






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