USPS 943 EXAM QUESTIONS AND
ANSWERS WITH SOLUTIO NS
Question :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
Correct answer:D. a pulsating pedal
Question :2. 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
Correct answer:B. PCV - Positive Crankcase Ventilation
Question :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
Correct answer:C. pinion
Question :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
Correct answer:B. defective cylinder head gasket
Question :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
Correct answer:A. air in the hydraulic system
Question :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
Correct answer:C. engine vacuum
Question :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
Correct answer:D. worn piston rings
Question :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"
Correct answer:C) 14" - 22"
Question :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
Correct answer:A. servo lever
Question :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 (d) king pin (e) spacer shims