Usps 943 Exam Questions & Answers

USPS 943 EXAM QUESTIONS & ANSWERS
1. Which of the following conditions will result when a brake drum is out of round?
A. a low pedal
B. a spongy pedal
C. a high pedal
D. a pulsating pedal
E. a hard pedal - Answer -D. a pulsating pedal

Which one of the following emission control systems is common to all cars and light
trucks made at the present time in the U.S.?
A. AIR - Air Injection Reaction
B. PCV - Positive Crankcase Ventilation
C. CCC - Computer Controlled Combustion
D. II - Improved Ignition
E. ACS - Air Cleaning System - Answer -B. PCV - Positive Crankcase Ventilation

3. In an automatic transmission, which of the following is part of a planetary gear set?
A. impeller
B. modulator
C. pinion
D. alternator
E. rotor - Answer -C. pinion

4. During a cylinder leakage test, what is indicated when air escapes through the
radiator from two adjacent cylinders?
A. worn cylinder walls
B. defective cylinder head gasket
C. leaking piston rings
D. worn exhaust valves
E. burnt intake valves - Answer -B. defective cylinder head gasket

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