Auto 10 - Otto Engine Operation
Wherein your knowledge of internal combustion engines is queried.
- 1.What are the two main features used in classifying automotive gasoline engines?
- A.
Fuel type and number of cylinders
- B.
Number and arrangement of cylinders
- C.
Fuel type and valve arrangement
- D.
Valve and cylinder arrangement
- 2.How often do timing belts need to be replaced?
- A.
Every year (or every 50 000 Km)
- B.
Every two years, unless engine has freewheeling valves
- C.
At a specified interval (usually 100 000 Km)
- D.
Never; they are durable but noisy
- 3.Why is variable valve timing beneficial to engine performance?
- A.
It helps the engine reach operating temperatures quicker
- B.
It can double the number of power strokes per cycle
- C.
It restricts breathing at higher engine speeds
- D.
It enhances breathing over greater RPM range
- 4.Two drawbacks of aluminum engine blocks are….?
- A.
They can warp when over heated & are expensive
- B.
They are heavy and expensive
- C.
They are heavy and can warp when over heated
- D.
They are expensive and have to be painted
- 5.Blue exhaust smoke is a sign of what?
- A.
Coolant burning in combustion chamber
- B.
Oil burning in combustion chamber
- C.
ATF burning in the combustion chamber
- D.
Brake fluid burning in the combustion chamber
- 6.Deep metallic knocking can be a sign of what engine problems?
- A.
Low oil pressure
- B.
Worn valve lifters
- C.
Broken timing belt (or chain)
- D.
All of the above
- 7.The two main causes of low compression are….
- A.
Cylinder/compression ring wear & faulty exhaust resonator
- B.
Valve problems & vacuum system leakage
- C.
Valve problems & cylinder/compression ring wear
- D.
Engine timing off & vacuum system leakage
- 8.What are the first things to investigate regarding an engine oil leak?
- A.
Valve covers & head gasket
- B.
Front & rear crankshaft seals
- C.
Oil pan gasket & head gasket
- D.
PCV valve & system
- 9.Maximum fuel economy, low emissions levels and best driveability requires what?
- A.
A mechanically sound engine
- B.
A good ignition system
- C.
Proper fuel system operation
- D.
All of the above
- 10.When compression testing an engine, the lowest cylinder should be no less than….
- A.
50% of the highest cylinder
- B.
65% of the highest cylinder
- C.
85% of the highest cylinder
- D.
75% of the highest cylinder
Questions: 8 | Attempts: 17943 | Last updated: Mar 22, 2022
-
Sample QuestionWhat does a spark plug do?
Questions: 10 | Attempts: 6078 | Last updated: Mar 22, 2022
-
Sample QuestionHow many revolutions of the crankshaft are in a complete cycle for a 4-stroke-cycle engine?
Questions: 15 | Attempts: 3866 | Last updated: Mar 22, 2022
-
Sample QuestionThe clutch friction disc always rotates with the:
Back to top