IC Engine Questions and Answers – Engine Friction

This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Engine Friction”.

1. The bearing friction includes the friction due to the main bearing connecting rod bearing and other bearings.
a) True
b) False
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2. Bearing friction is viscous in nature and does not depends upon the oil viscosity, the speed, size and geometry of the journal.
a) True
b) False
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3. The valve gear friction losses vary with the engine design variables and no general equation is available predicting them.
a) True
b) False
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4. The blow by losses is the phenomenon of leakage of combustion products past the piston and piston rings from the cylinder to the crankcase.
a) True
b) False
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5. Blow by losses depend on the outlet pressure and compression ratio.
a) True
b) False
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6. Blow by losses vary as the square root of inlet pressure, and increases as the compression ratio are ____________
a) increased
b) reduced
c) unpredictable
d) none of the mentioned
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7. Blow by losses are reduced as the engine speed is ____________
a) increased
b) reduced
c) unpredictable
d) none of the mentioned
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8. A rise in cooling water temperature ____________ engine friction through its effect on oil viscosity.
a) increases
b) reduces
c) unpredictable
d) none of the mentioned
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9. Higher the oil viscosity ____________ is the friction loss.
a) lower
b) greater
c) unpredictable
d) none of the mentioned
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10. As the load increases the maximum pressure in the cylinder has a tendency to increase slightly.
a) True
b) False
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Sanfoundry Global Education & Learning Series – IC Engine.

To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.