USPS 943 EXAM QUESTIONS AND ANSWERS WITH SOLUTIONS

USPS 943 EXAM QUESTIONS AND ANSWERS WITH SOLUTIONS 1. 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 2. 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 3. 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 4. 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 5. 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" 6. 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 7. 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 - ANSWER -E. spacer shims 8. Which of the following conditions will result when a brake drum is out of round?