310T Exam - Engine and Supporting
Systems Exam UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
1. What would be indicated by engine oil contaminated with coolant?
a. Cracked dry liner.
b. Leaking liner O-rings.
c. Leaking oil cooler core.
d. Cracked liner counter-bore. - CORRECT ANSWER b. Leaking liner O-rings.
2. What will cause excessive crankcase blow by?
a. Worn oil control rings.
b. Excessive engine speed.
c. Worn compression rings.
d. A plugged crankcase filter. - CORRECT ANSWER c. Worn compression rings.
3. What would be the case of a failed cylinder head gasket?
a. Rolled liner O-rings.
b. Cracked cylinder head.
c. Insufficient liner height.
d. Turbocharger waste-gate stuck open. - CORRECT ANSWER c. Insufficient liner height.
4. What would indicate a faulty vacuum valve in the radiator cap?
a. Engine overheating.
b. Collapsed radiator hose.
c. Extended warm up time.
d. Overfilled coolant reservoir. - CORRECT ANSWER b. Collapsed radiator hose.
5. What component is leaking when the engine oil is found in the coolant?
a. Injector cups.
,b. Oil cooler core.
c. After cooler core.
d. Cylinder liner O-rings. - CORRECT ANSWER b. Oil cooler core.
6. What would indicate that the engine oil pump regulating valve is stuck open?
a. Increased oil pressure.
b. Decreased oil pressure.
c. Increased oil consumption.
d. Decreased oil consumption. - CORRECT ANSWER b. Decreased oil pressure.
7. What will cause a diesel engine to run rough and stall?
a. Poor fuel quality.
b. A plugged return line.
c. Air in the fuel system.
d. Low transfer pump pressure.
54 - CORRECT ANSWER c. Air in the fuel system.
8. What is the cause of low fuel transfer pump pressure?
a. Plugged fuel filter.
b. Return line restriction.
c. Leaking fuel tank vent.
d. Regulating valve stuck closed. - CORRECT ANSWER a. Plugged fuel filter.
9. Which will cause a diesel engine to have low power output?
a. Cracked intercooler.
b. Excessive turbocharger speed.
c. Leaking turbocharger exhaust outlet.
d. Turbocharger waste-gate valve stuck closed. - CORRECT ANSWER a. Cracked intercooler.
10. What must be used on an engine equipped with a DPF filter?
, a. Fuel lubricity additive.
b. Low sulfur Diesel fuel.
c. 5% Bio-Diesel/Ethanol blend.
d. Ultra low sulfur diesel fuel. - CORRECT ANSWER d. Ultra low sulfur diesel fuel
11. What will happen when the soot loading on a DPF filter exceeds 80%?
a. Reduced fuel economy.
b. A forced manual regeneration.
c. Engine de-rate and shutdown.
d. The DPF will bypass automatically. - CORRECT ANSWER c. Engine de-rate and shutdown.
12. What exhaust smoke colour would indicate a leaking dosing valve?
a. Blue.
b. Black.
c. White.
d. Brown. - CORRECT ANSWER b. black
13. What does the second number in an SAE fault code indicate?
a. Type of circuit failure.
b. Type of sensor circuit.
c. Message identification.
d. Number of fault occurrences - CORRECT ANSWER a. Type of circuit failure.
14. What would happen to the engine if the ECM does not receive a speed or timing signal?
a. Exceed governed speed.
b. Hunt at governed speed.
c. Start and run at idle speed.
d. Cranks but does not start. - CORRECT ANSWER d. Cranks but does not start.
15. What should be done when the depth of a cylinder block liner counterbore varies 0.003"
Systems Exam UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
1. What would be indicated by engine oil contaminated with coolant?
a. Cracked dry liner.
b. Leaking liner O-rings.
c. Leaking oil cooler core.
d. Cracked liner counter-bore. - CORRECT ANSWER b. Leaking liner O-rings.
2. What will cause excessive crankcase blow by?
a. Worn oil control rings.
b. Excessive engine speed.
c. Worn compression rings.
d. A plugged crankcase filter. - CORRECT ANSWER c. Worn compression rings.
3. What would be the case of a failed cylinder head gasket?
a. Rolled liner O-rings.
b. Cracked cylinder head.
c. Insufficient liner height.
d. Turbocharger waste-gate stuck open. - CORRECT ANSWER c. Insufficient liner height.
4. What would indicate a faulty vacuum valve in the radiator cap?
a. Engine overheating.
b. Collapsed radiator hose.
c. Extended warm up time.
d. Overfilled coolant reservoir. - CORRECT ANSWER b. Collapsed radiator hose.
5. What component is leaking when the engine oil is found in the coolant?
a. Injector cups.
,b. Oil cooler core.
c. After cooler core.
d. Cylinder liner O-rings. - CORRECT ANSWER b. Oil cooler core.
6. What would indicate that the engine oil pump regulating valve is stuck open?
a. Increased oil pressure.
b. Decreased oil pressure.
c. Increased oil consumption.
d. Decreased oil consumption. - CORRECT ANSWER b. Decreased oil pressure.
7. What will cause a diesel engine to run rough and stall?
a. Poor fuel quality.
b. A plugged return line.
c. Air in the fuel system.
d. Low transfer pump pressure.
54 - CORRECT ANSWER c. Air in the fuel system.
8. What is the cause of low fuel transfer pump pressure?
a. Plugged fuel filter.
b. Return line restriction.
c. Leaking fuel tank vent.
d. Regulating valve stuck closed. - CORRECT ANSWER a. Plugged fuel filter.
9. Which will cause a diesel engine to have low power output?
a. Cracked intercooler.
b. Excessive turbocharger speed.
c. Leaking turbocharger exhaust outlet.
d. Turbocharger waste-gate valve stuck closed. - CORRECT ANSWER a. Cracked intercooler.
10. What must be used on an engine equipped with a DPF filter?
, a. Fuel lubricity additive.
b. Low sulfur Diesel fuel.
c. 5% Bio-Diesel/Ethanol blend.
d. Ultra low sulfur diesel fuel. - CORRECT ANSWER d. Ultra low sulfur diesel fuel
11. What will happen when the soot loading on a DPF filter exceeds 80%?
a. Reduced fuel economy.
b. A forced manual regeneration.
c. Engine de-rate and shutdown.
d. The DPF will bypass automatically. - CORRECT ANSWER c. Engine de-rate and shutdown.
12. What exhaust smoke colour would indicate a leaking dosing valve?
a. Blue.
b. Black.
c. White.
d. Brown. - CORRECT ANSWER b. black
13. What does the second number in an SAE fault code indicate?
a. Type of circuit failure.
b. Type of sensor circuit.
c. Message identification.
d. Number of fault occurrences - CORRECT ANSWER a. Type of circuit failure.
14. What would happen to the engine if the ECM does not receive a speed or timing signal?
a. Exceed governed speed.
b. Hunt at governed speed.
c. Start and run at idle speed.
d. Cranks but does not start. - CORRECT ANSWER d. Cranks but does not start.
15. What should be done when the depth of a cylinder block liner counterbore varies 0.003"
