Postal Automotive Technician Exam
944/USPS 943 Exam with complete
solution
1. The vibration damper on an auto engine is fastened to the - ANS Crankshaft
2. Most small gas engines use a _________ ignition system - ANS Magneto
3. Icing occurs most often - ANS On cool damp days
4. The function of the float in a carburetor is two - ANS Close the needle valve
5. To improve stability when cornering manufactures added a device to cars called - ANS
Stabilizer bar
6. adjustment of the rods on a car will affect - ANS Toe-in
7. A restriction in the exhaust system is indicated on a vacuum gauge by a - ANS gradual
decrease in reading
8. Disc brakes on a car have a distinct advantage over conventional drum brakes in that they -
ANS Fade Less when hot
9. In a diesel engine, the fuel is ignited by the - ANS Heat of compression
10. Engine timing is generally set by using a - ANS Strobe light
11. If an engine is operating for long periods of time at part throttle opening the - ANS Spark
plugs will become covered with carbon
12. Leaking intake valve guides will cause - ANS Excessive oil consumption
13. Flooding of a carburetor is generally caused by - ANS A stuck float needle valve
14. On many cars the fuel pump is combined with the - ANS vacuum pump
15. Corbon fouling of a spark plug is an indication of - ANS To rich a mixture
, 16. If a test shows that generator output is excessive even after the F Terminal has been
disconnected the trouble may be traced to - ANS The generator
17. An automobile alternator converts alternating current to direct current, by means of - ANS
Silicon diodes
18. Hard starting is very often caused by - ANS Improper choke operation
19. A car with a history of burned points would probably indicate - ANS Too high setting of the
voltage regulator
20. When it is necessary to recondition brake drums, the maximum allowable amount of the
oversize is__________ inches - ANS .060
21. The amount of air fuel mixture taken into the cylinder on the intake Stroke is a measure of
the engines. - ANS Volumetric efficiency
22. Welch plugs are installed on engines to provide - ANS A means of removing the sand after
the engine is cast
23. The two cycle engine produces a power stroke with every_________
Of the crankshaft. - ANS Revolution
24. Preignition may be caused by - ANS Carbon deposits
25. The size of an outdoor motor propeller is always given in - ANS Diameter and pitch
26. Closed, crank case ventilation systems are used to - ANS Aid and prevention of air
contamination
27. The angular motion about the vertical axis of an aircraft or spacecraft, is known as - ANS
Yaw
28. The carburetor circuit that maintains a constant level of fuel in the float bowl is the_______
Circuit - ANS Float
29. A jet engine combustion chamber liner is cool by - ANS Air streams
30. Regenerative gas turbine engines have been successfully develop for use on - ANS
Automobiles
31. Power impulses from the engine are smoothed out by the - ANS Fly wheel
32. The service ratings MS, SE, SG refers to - ANS Motor oils
944/USPS 943 Exam with complete
solution
1. The vibration damper on an auto engine is fastened to the - ANS Crankshaft
2. Most small gas engines use a _________ ignition system - ANS Magneto
3. Icing occurs most often - ANS On cool damp days
4. The function of the float in a carburetor is two - ANS Close the needle valve
5. To improve stability when cornering manufactures added a device to cars called - ANS
Stabilizer bar
6. adjustment of the rods on a car will affect - ANS Toe-in
7. A restriction in the exhaust system is indicated on a vacuum gauge by a - ANS gradual
decrease in reading
8. Disc brakes on a car have a distinct advantage over conventional drum brakes in that they -
ANS Fade Less when hot
9. In a diesel engine, the fuel is ignited by the - ANS Heat of compression
10. Engine timing is generally set by using a - ANS Strobe light
11. If an engine is operating for long periods of time at part throttle opening the - ANS Spark
plugs will become covered with carbon
12. Leaking intake valve guides will cause - ANS Excessive oil consumption
13. Flooding of a carburetor is generally caused by - ANS A stuck float needle valve
14. On many cars the fuel pump is combined with the - ANS vacuum pump
15. Corbon fouling of a spark plug is an indication of - ANS To rich a mixture
, 16. If a test shows that generator output is excessive even after the F Terminal has been
disconnected the trouble may be traced to - ANS The generator
17. An automobile alternator converts alternating current to direct current, by means of - ANS
Silicon diodes
18. Hard starting is very often caused by - ANS Improper choke operation
19. A car with a history of burned points would probably indicate - ANS Too high setting of the
voltage regulator
20. When it is necessary to recondition brake drums, the maximum allowable amount of the
oversize is__________ inches - ANS .060
21. The amount of air fuel mixture taken into the cylinder on the intake Stroke is a measure of
the engines. - ANS Volumetric efficiency
22. Welch plugs are installed on engines to provide - ANS A means of removing the sand after
the engine is cast
23. The two cycle engine produces a power stroke with every_________
Of the crankshaft. - ANS Revolution
24. Preignition may be caused by - ANS Carbon deposits
25. The size of an outdoor motor propeller is always given in - ANS Diameter and pitch
26. Closed, crank case ventilation systems are used to - ANS Aid and prevention of air
contamination
27. The angular motion about the vertical axis of an aircraft or spacecraft, is known as - ANS
Yaw
28. The carburetor circuit that maintains a constant level of fuel in the float bowl is the_______
Circuit - ANS Float
29. A jet engine combustion chamber liner is cool by - ANS Air streams
30. Regenerative gas turbine engines have been successfully develop for use on - ANS
Automobiles
31. Power impulses from the engine are smoothed out by the - ANS Fly wheel
32. The service ratings MS, SE, SG refers to - ANS Motor oils
