Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
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| 1. | The average gasoline engine
compression ratio is: a. | 8 to 1 | b. | 10 to 1 | c. | 16 to 1
higher | d. | 2 to 1 | | | | | | | | |
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| 2. | 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 | | | | |
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| 3. | While running a tractor, with
all your personal protection items in place you should be aware of: a. | Leaks and Spills | c. | Oil level of the engine | b. | Battery cable condition | d. | Proper shop ventilation | | | | |
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| 4. | The average diesel engine
compression ratio is: a. | 8 to 1 | b. | 10 to 1 | c. | 16 to 1
higher | d. | 2 to 1 | | | | | | | | |
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| 5. | If you pull a spark plug wire
from a plug while the engine is running and the engine misfires that plug is : a. | Gapped too wide | c. | Is fouled | b. | Probably firing
OK | d. | Will need the wire replaced | | | | |
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| 6. | If you loosen a high pressure
injector line to an injector nozzle while running and the engine misfires: a. | The glow plugs are faulty | c. | The injector nozzle is good | b. | The line is plugged | d. | The filters are restricted | | | | |
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| 7. | A restricted air filter will
result in an engine running: a. | above the rated idle
RPM | c. | a lean fuel mixture | b. | a rich fuel
mixture | d. | below the rated idle RPM | | | | |
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| 8. | For any engine to run you first
need: a. | air, coolant, oil | c. | air, a source of heat, coolant | b. | air, fuel, oil | d. | air, fuel, a source of heat | | | | |
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| 9. | When the requirements of
question 8 are met for any engine to run properly you must supply: a. | 12 volts to the system | c. | compression and proper timing | b. | air cleaner large enough to supply air | d. | spark plugs gapped at
.035 | | | | |
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| 10. | A diesel engine fires and runs
from a precise injection of fuel and: a. | The heat of compressed air within the
cylinder | b. | The glow plugs | c. | The intake manifold heater | d. | The spark ignition
system | | |
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| 11. | A neutral start switch is said
to be closed while the transmission is in PARK or NEUTRAL, this means: a. | No Voltage will be supplied to the starter solenoid | b. | Battery voltage will be supplied to the starter switch | c. | Battery voltage will be supplied to the starter solenoid | d. | The Battery is bad | | |
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| 12. | If an electrical circuit is
said to be open it means: a. | The circuit is able to let voltage
flow | b. | The circuit is shorted to ground | c. | The circuit is not allowing voltage to flow | d. | The circuit has color coded wires | | |
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| 13. | Ohms is a measurement
of: a. | Battery condition | c. | Grounded circuits | b. | Wire size | d. | Resistance within a circuit | | | | |
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| 14. | While safely connecting a
battery charger to a battery you should, to avoid arcs a. | Connect the positive terminal first then the negative terminal, charger
off | b. | Connect the negative terminal first then the positive terminal,
charger off | c. | Makes no difference as long as charger is
off | d. | Only charge if battery is less than 5 volts | | |
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| 15. | A loose fan belt could show up
as: a. | A high pitch noise with increase in RPM | b. | A no or low charging condition | c. | A overheating condition | d. | Any combination of these is
correct | | |
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| 16. | The radiator cap function is to
pressurize the cooling system, this is to: a. | To keep the anti-freeze in the
system | b. | To raise the boiling point of the coolant | c. | To lower the boiling point of the coolant | d. | Vent the steam associated with high output engines | | |
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| 17. | To avoid accidents while
servicing a tractor’s hydraulic system for leaks you should: a. | Remove the battery cables | b. | Drain the hydraulic
fluid | c. | Put the key in your pocket | d. | Lower any implements and relieve system pressure | | |
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| 18. | The term DWELL refers
to: a. | The degrees of rotation that a set of contact points in a distributor open and
close | b. | An EPA emissions report | c. | Fuel volatility | d. | Diesel with electrical lower
lifters | | |
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| 19. | The term TDC refers
to: a. | The piston timing position | c. | Time delayed circuit | b. | Top direction carburetor | d. | The piston at it’s top most position | | | | |
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| 20. | When you choke a carburetor,
you in effect: a. | Increase the fuel supply to the
mixture | c. | Decrease the air supply to the mixture | b. | Increase the air supply to the mixture | d. | Decrease the fuel supply to the
mixture | | | | |
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| 21. | Should a fire brake out in
around a tractor or in a shop you should: a. | Douse the fire with
water | b. | Use a fire extinguisher and point it at the top of the
flames | c. | Use a fire extinguisher and point it at the base of the
flames | d. | Run like mad and call 911 | | |
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| 22. | To obtain the best detailed
engine specifications you should: a. | Consult the operator
manual | b. | Phone a friend | c. | Consult the technical manual | d. | Consult the operator manual and consult the technical manual along with internet
resources | | |
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| 23. | Diesel systems and Hydraulic
systems have extreme dangers associated with leaks due to: a. | They contain fluids that will burn | b. | They contain fluids that are slick and cause falls | c. | They contain fluids that will irritate skin | d. | They contain fluids in areas that are under extreme pressure and can penetrate skin
and body tissues causing loss of limbs or life. | | |
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| 24. | If a starter is dragging or not
turning at rated RPM, the cause could be: a. | Corroded battery terminals
| b. | Low battery voltage | c. | High resistance in the armature or fields or worn brushes | d. | Any of these could be the cause | | |
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| 25. | If a tractor has a problem with
any kind of safety start switches should: a. | By-pass or jumper around the problem until
parts can be ordered | b. | Not use the tractor until it can be
prepared | c. | By-pass or jumper around the problem until parts can be ordered and
notify anyone using it about this condition | d. | Take this tractor out of service, notify all persons that may use this tractor, order
parts and repair before using | | |
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