21. The forced-fed lubrication system means that the oil is delivered to the engine by
gravity
the pressure created by the oil pump
splashing action of the crankshaft
none of these
✅ The correct answer is option B.
Automobile Engineering MCQs
22. The auto ignition in a spark ignition engine means
automatic ignition of the charge at the end of compression
ignition induced by the passage of a spark
ignition of the charge before the passage of flame front
ignition induced to su
✅ The correct answer is option C.
23. Free pedal play in car clutches is about
15 mm
25 mm
40mm
60 mm
✅ The correct answer is option B.
24. The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints
absorb the vibrations transferred from the surface of the road
compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
absorb any difference in speed between the left and right wheels when the vehicle is turning
none of the above
✅ The correct answer is option B.
25. The octane number of compressed natural gas (CNG) is
90
100
110
120
✅ The correct answer is option D.
26. The damper fluid leakage typically occur from
upper damper mounting
bottom of damper
clearance between inner and outer tubes of damper
coil spring mounting
✅ The correct answer is option C.
27. Valve overlap is the number of degrees of camshaft rotation during which
both valves are closed
both valves are open
both ‘a’ and ‘b’
none of these
✅ The correct answer is option B.
28. The engine oil level should be checked
immediately after the ignition switch is turned off
while the engine is running
a few minutes after the ignition switch is turned off
while the engine is ru
✅ The correct answer is option C.
29. The lower cylindrical portion of the piston which improves piston cooling performance is called
piston crown
connecting rod
piston pin boss
piston skirt
✅ The correct answer is option D.
30. When the battery is half (50%) charged, the specific gravity of acid in a battery is usually
0.74
1
1.12
1.19
✅ The correct answer is option D.