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Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. |
| | 1. | The free travel of the clutch pedal indicates: | a. | The clearance between the clutch release parts | | b. | The clearance between the clutch plates | | c. | The clearance between the pedal and the tractor frame | | d. | The clearance between gear and pinion drives | | | | |
| | 2. | The cause of an engine using too much oil could be: | a. | Improper fuel type used | c. | Crankcase oil too light | | b. | A loose fan belt | d. | Improper distributor timing | | | | | | |
| | 3. | Tractor power is measured in horsepower. One horsepower is equal to: | a. | 33000 foot pounds per second | c. | 330000 foot pounds per hour | | b. | 550 foot pounds per minute | d. | 200 foot pounds per minute | | | | | | |
| | 4. | The camshaft turns at ____________ the speed of the engine crankshaft. | a. | 1/4 | b. | 1/2 | c. | Two-thirds | d. | None are correct | | | | | | | | | | |
| | 5. | A torque converter operates as: | a. | An automatic fluid drive | | b. | A gear-driven unit with special gears | | c. | A synchromesh transmission unit | | d. | A clutch-type transmission with sliding gears | | | | |
| | 6. | Piston slap results from excessive clearance between the piston and the: | a. | Wrist pin | b. | Cylinder head | c. | Rings | d. | Cylinder wall | | | | | | | | | | |
| | 7. | The level of gasoline in the carburetor bowl is controlled by: | a. | Air bleeds | c. | Float | | b. | Venturi | d. | Size of the inlet orifice | | | | | | |
| | 8. | The first two items to check when troubleshooting a hydraulic system are: | a. | Pressure; temperature | c. | Oil level; oil filter | | b. | Oil flow; temperature | d. | Pressure; oil flow | | | | | | |
| | 9. | The _______ fuel filters clean fuel the best because the second filter can pick up dirt missed by the first one. | a. | Circular | b. | Cylindrical | c. | Series | d. | Parallel | | | | | | | | | | |
| | 10. | To reduce the inside diameter of the valve guide use a: | a. | Reamer | b. | Hone | c. | Knurler | d. | Boring bar | | | | | | | | | | |
| | 11. | What is the firing order of a six cylinder engine? | a. | 153642 | b. | 152634 | c. | 153624 | d. | 135642 | | | | | | | | | | |
| | 12. | In diesel engines, typically, the compression ratio is ________ than the compression ratio in gasoline engines. | a. | Lower | | b. | Higher | | c. | Doesn’t matter what type engine you have, both are typically the same | | | | |
| | 13. | What is the general sequence for tightening cylinder head bolts? | a. | Tighten from left to right | c. | Tighten from the edges in | | b. | Tighten from the center out | d. | Tighten from right to left | | | | | | |
| | 14. | Thermostats are not required in engines during hot weather |
| | 15. | The primary ignition circuit always has a high voltage on it. |
| | 16. | The cause of engine overheating may be: | a. | Wrong oil viscosity | c. | Choke in closed position | | b. | Improper valve clearance | d. | Defective thermostat | | | | | | |
| | 17. | The cause of low engine power could be due to: | a. | Incorrect valve clearance | c. | Dirty air cleaner | | b. | Wrong type of fuel | d. | All of these are correct | | | | | | |
| | 18. | Excessive black smoke from a diesel engine can be caused by: | a. | Worn injector orifices | c. | Overfueling | | b. | Restricted air filters | d. | All answers are correct | | | | | | |
| | 19. | Low engine oil pressure could be caused by: | a. | Worn compression rings | c. | A faulty oil pressure relief valve | | b. | Worn oil rings | d. | Too high a viscosity of engine oil | | | | | | |
| | 20. | Oil bubbles or foaming oil in a hydraulic system can be caused by: | a. | Water in the system | c. | Air leak in the oil system intake | | b. | Low fluid level | d. | All answers are correct | | | | | | |
| | 21. | If you loosen a high pressure fuel line to an injection nozzle and the engine misfires, that nozzle is probably: | a. | Good | c. | In need of cleaning | | b. | Defective | d. | In need of replacement | | | | | | |
| | 22. | Two functions of plungers on inline pumps are ________ of fuel. | a. | Delivery and atomization | c. | Pressurization and delivery | | b. | Injection and delivery | d. | Atomization and injection | | | | | | |
| | 23. | On most tractor carburetors the main adjusting needle controls the amount of: | a. | Fuel | c. | Vacuum | | b. | Air | d. | No answers are correct | | | | | | |
| | 24. | A hydrometer is used to test: | a. | A battery | c. | Oil level | | b. | Coolant level | d. | Distributor performance | | | | | | |
| | 25. | A tractor will deliver more horsepower at the: | a. | Belt pulley | b. | Drawbar | | | | | | |