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Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. |
| | 1. | The crankshaft in a 4-cycle turns at ______ the speed of the camshaft. | a. | Twice | | b. | Four times | | c. | One-half | | d. | The same speed as | | | | |
| | 2. | The torque specifications of 20 foot pounds would convert to? | a. | 1.66 inch pounds | c. | 8 inch pounds | | b. | 240 inch pounds | d. | 32 inch pounds | | | | | | |
| | 3. | The storage battery provides electricity through? | a. | electrolysis | b. | heat process | c. | osmosis | d. | induction | | | | | | | | | | |
| | 4. | Piston slap results from excessive clearance between? | a. | piston and piston pin | c. | piston rings | | b. | piston and piston rod | d. | piston and cylinder wall | | | | | | |
| | 5. | Resistance to flow of current in a conductor is overcome by? | a. | amperage | b. | voltage | c. | eddy current | d. | magnetism | | | | | | | | | | |
| | 6. | Which of the following indicates the proper piston stroke sequence for a 4 cycle engine? | a. | intake-power-exhaust-compression | c. | intake-compression-power-exhaust | | b. | intake-compression-exhaust-power | d. | intake-power-compression-exhaust | | | | | | |
| | 7. | Viscosity index indicates | a. | sequence number for fuel | | b. | micrometer reference | | c. | a characteristic of oil | | d. | the pressure developed by the fuel pump | | | | |
| | 8. | When a piston has reached the top of its stroke it is known as ____________. | a. | IRS | b. | ABC | c. | BDE | d. | TDC | | | | | | | | | | |
| | 9. | When air passes through the carburetor venturi the ..... | a. | velocity and pressure increase | | b. | velocity increases and pressure decreases | | c. | velocity and pressure deceases | | d. | velocity increases and pressure remains constant | | | | |
| | 10. | A mechanical device which produces AC current is a/an | a. | condenser | b. | alternator | c. | rectifier | d. | capacitor | | | | | | | | | | |
| | 11. | To test engine oil pressure | a. | install a master gauge | c. | have the oil analyzed | | b. | check the oil level | d. | set the tractor on aslope | | | | | | |
| | 12. | Dim tractor lights may be due to | a. | bad ignition coil | c. | defective condenser | | b. | poor ground | d. | bad spark plugs | | | | | | |
| | 13. | 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 | | | | | | |
| | 14. | Regular diesel engines can not use fuels containing alcohols because | a. | alcohols have too high of a cetane rating | | b. | alcohols have to low of a cetane rating | | c. | alcohols will not self-ignite easily | | d. | alcohols have to low of a cetane rating and will not self-ignite easily | | | | |
| | 15. | The diesel fuel system transfer pump pushes fuel to the | a. | injector nozzles | c. | combustion chamber | | b. | injector pump | d. | auxiliary tank | | | | | | |
| | 16. | The diesel fuel system injection pump____ and pressurizes the fuel to the nozzles | a. | times | b. | atomizes | c. | sprays | d. | filters | | | | | | | | | | |
| | 17. | Each time the fuel filters or fuel lines are removed from the diesel fuel system.You must: | a. | bleed the lines of air | c. | run a solvent through the lines | | b. | pump air into the lines | d. | fill the fuel tank | | | | | | |
| | 18. | Detergent additives in oil help | a. | keep the metal surfaces clean and prevent deposits | | b. | prevent rusting of metal parts during storage | | c. | keep oil from oxidizing parts during storage | | d. | all of these answers are correct | | | | |
| | 19. | An oil with a CD letter designation would be recommended for | a. | small gasoline engines minimum duty | | b. | diesel engine light duty | | c. | severe duty diesel engine | | d. | 1968-71 gasoline engine warranty service | | | | |
| | 20. | Diesel fuel pumps using a mechanical shut off will: | a. | not allow the engine to shut off if the throttle is in the maximum RPM position | | b. | always override the throttle and shut the engine down | | c. | decelerate but not stop the engine if throttle is in maximum RPM position | | d. | none of these answers are correct | | | | |
| | 21. | If you loosen a high pressure fuel line to an injector nozzle and the engine misfires. That nozzle is probably? | a. | good | c. | in need of cleaning | | b. | defective | d. | in need of replacement | | | | | | |
| | 22. | The 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. | The following components are part of the diesel injection system: | a. | injection pump, transfer pump, injector fuel filter, and distributor | | b. | fuel supply pump and lines, injection pump,nozzle, primary and secondary filters | | c. | spark plugs, distributor, plug wires, points and condenser coil | | d. | nozzle, injection pump, coil, all filters, fuel supply pump | | | | |
| | 24. | The turbocharger speed is determined by the exhaust gases, therefore its speed is | a. | more dependent on engine speed than engine load | | b. | more dependent on engine load than engine speed | | c. | more dependent on the temperature of intake air | | d. | none of these answers are correct | | | | |
| | 25. | To provide 24 volts, connect two 12 volt batteries in | a. | series | c. | combination | | b. | parallel | d. | this can’t be done | | | | | | |