USPS 943 Exam Questions and Answers

USPS 943 Exam Questions and
Answers

5. Which of the following would cause a soft, spongy brake pedal?
A. air in the hydraulic system
B. bent caliper retainer
C. warped rotors
D. out of round drum
E. loose lug nut - ANSWER-A. air in the hydraulic system

6. A PCV valve is controlled by which of the following?
A. valve lifter
B. throttle cable
C. engine vacuum
D. rocker arm
E. exhaust pressure - ANSWER-C. engine vacuum

7. What is wrong during a compression test, if a low compression reading goes up
after a small amount of oil is squirted into a spark plug hole?
A. defective rocker arm
B. worn lifter
C. cracked cylinder head
D. worn piston rings
E. burnt intake valve - ANSWER-D. worn piston rings

8. A vacuum gauge connected to a well tuned engine should show a steady reading
between which of the following during engine idle?
A) 23" - 27"
B) 4" - 8"
C) 14" - 22"
D) 32" - 38"
E) 28" - 32" - ANSWER-C) 14" - 22"

9. The front band of an automatic transmission is applied through which of the
following?
A. servo lever
B. rear clutch
C.flywheel
D. pinion gear
E. shaft bearing - ANSWER-A. servo lever

10. Which of the following is used to adjust the up and down clearance between an I-
beam or solid front axle and the steering knuckle?
A. idler arm
B. truck arm
C. thrust bearing