Postal Automotive Technician Exam 944 with complete verified solutions 2024

1. The vibration damper on an auto engine is fastened to the Crankshaft 2. Most small gas engines use a _________ ignition system Magneto 3. Icing occurs most often On cool damp days 4. The function of the float in a carburetor is two Close the needle valve 5. To improve stability when cornering manufactures added a device to cars called Stabilizer bar 6. adjustment of the rods on a car will affect Toe-in 7. A restriction in the exhaust system is indicated on a vacuum gauge by a gradual decrease in reading 8. Disc brakes on a car have a distinct advantage over conventional drum brakes in that they Fade Less when hot 9. In a diesel engine, the fuel is ignited by the Heat of compression 10. Engine timing is generally set by using a Strobe light 11. If an engine is operating for long periods of time at part throttle opening the Spark plugs will become covered with carbon 12. Leaking intake valve guides will cause Excessive oil consumption 13. Flooding of a carburetor is generally caused by A stuck float needle valve 14. On many cars the fuel pump is combined with the vacuum pump 15. Corbon fouling of a spark plug is an indication of 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 The generator 17. An automobile alternator converts alternating current to direct current, by means of Silicon diodes 18. Hard starting is very often caused by Improper choke operation 19. A car with a history of burned points would probably indicate 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 .060 21. The amount of air fuel mixture taken into the cylinder on the intake Stroke is a measure of the engines. Volumetric efficiency 22. Welch plugs are installed on engines to provide 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. Revolution 24. Preignition may be caused by Carbon deposits 25. The size of an outdoor motor propeller is always given in Diameter and pitch 26. Closed, crank case ventilation systems are used to Aid and prevention of air contamination 27. The angular motion about the vertical axis of an aircraft or spacecraft, is known as Yaw 28. The carburetor circuit that maintains a constant level of fuel in the float bowl is the_______ Circuit Float 29. A jet engine combustion chamber liner is cool by Air streams 30. Regenerative gas turbine engines have been successfully develop for use on Automobiles 31. Power impulses from the engine are smoothed out by the Fly wheel 32. The service ratings MS, SE, SG refers to Motor oils 33. The intake and exhaust openings on a two stroke cycle engine are known as Ports