|
True/False
Indicate whether the sentence or statement is true or false. |
| | 1. | Reciprocating motion is circular movement. |
| | 2. | The best pump for an open center system is the piston pump. |
| | 3. | A hydraulic pump creates pressure. |
| | 4. | Thermostats are not required when operating a modern engine in hot weather. |
| | 5. | The typical carburetor adjustments include load needle, idle speed,and idle mixture. |
| | 6. | When adjusting valve tappet clearance, set the respective cylinder a TDC of the exhaust stroke. |
| | 7. | The venturi in the carburetor slows the air flow. |
| | 8. | An interference valve seat is when the valve face and head are both the same angle. |
| | 9. | A high reading on the intake vacuum test on a diesel engine indicates an air intake restriction. |
| | 10. | A cylinder head can be checked for warpage by sighting across the flat surface. |
|
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. |
| | 11. | 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 | | | | |
| | 12. | A compression ration of _________ is common for diesel engines. | a. | 8 to 1 | b. | 12 to 1 | c. | 16 to 1 | d. | 40 to 1 | | | | | | | | | | |
| | 13. | The camshaft turns at __________ the speed of the engine crankshaft. | a. | 1/4 | c. | 2/3 | | b. | 1/2 | d. | None of these are correct | | | | | | |
| | 14. | Low battery charge may be due to: | a. | High speed engine operation | c. | Low engine temperature | | b. | Continuous drain on battery | d. | Engine out of time | | | | | | |
| | 15. | Which is NOT a function of a radiator cap? | a. | Allows atmospheric pressure to enter the cooling system | | b. | Prevents coolant escape at normal pressures | | c. | Allow atmospheric pressure to escape the coolant | | d. | All of these are correct | | | | |
| | 16. | The level of gasoline in the carburetor bowl is controlled by: | a. | Air bleeds | c. | Float | | b. | Venturi | d. | Size of the inlet orifice | | | | | | |
| | 17. | To reduce the inside diameter of a valve guide use: | a. | A reamer | b. | A hone | c. | A knurler | d. | A boring bar | | | | | | | | | | |
| | 18. | What is the firing order of a six cylinder engine? | a. | 153642 | b. | 152634 | c. | 153624 | d. | 135642 | | | | | | | | | | |
| | 19. | 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 | | | | | | |
| | 20. | Two functions of plungers on inline injector pumps are __________ of fuel. | a. | Delivery and atomization | c. | Pressurization and delivery | | b. | Injection and delivery | d. | Atomization and injection | | | | | | |
| | 21. | On most tractors, the main adjusting needle (power jet) of the carburetor controls the amount of: | a. | Fuel | b. | Air | c. | Vacuum | d. | None are correct | | | | | | | | | | |
| | 22. | A hydrometer is used to test: | a. | A battery | c. | Oil level | | b. | Coolant level | d. | Distributor performance | | | | | | |
| | 23. | A tractor will deliver more horsepower at the: | a. | Belt pulley | c. | hydraulic cylinder | | b. | Drawbar | d. | Attached implement | | | | | | |
| | 24. | Which type of oil pump is not commonly found in pressure lubrication systems on 4 cycle engines | a. | external gear pump | c. | plunger pump | | b. | rotor pump | d. | vane pump | | | | | | |