11. Valve overlap is the number of degrees of crankshaft rotation during which: A. Both intake and exhaust valve are closed B. Both intake and exhaust valve are open C. The valves are moving from fully closed to the timing point D. The valves float Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
12. Volumetric efficiency is a measure of A. Speed of the engine B. Power of the engine C. Breathing capacity of the engine D. Pressure rise in the cylinder Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
13. The total vehicle resistance is the sum of air resistance, rolling resistance and gradient resistance. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
14. The mean effective pressure of diesel cycle having fixed compression ratio will increase if cut-off ratio A. Increases B. Decreases C. Independent of CR D. Depends upon other factor Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
15. The tractive effort is . . . . . . . . proportional to speed of the vehicle, when the power is constant. A. Directly B. Inversely C. Squarely D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
16. Torqueproduced by the Auto Engine at 4000 r.p.m. is 4 N-m. Torque that can be produced by the same engine at 6000 r.p.m. is A. 2 N-m B. 3 N-m C. 4 N-m D. 5 N-m Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. The net work per cycle done by the piston on the cylinder gases during the inlet and exhaust stroke is called as A. Pumping work B. Rubbing friction work C. Accessory work D. Total friction work Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
18. To measure Brake Power of the Auto Engines following device is used. A. Indicator B. Dynamometer C. Hydromete D. Watt meter Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
19. Increase of torque in a vehicle is obtained by . . . . . . . . A. Decreasing speed B. Decreasing power C. Decreasing fuel consumption D. All of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
20. In Multi cylinderAuto Engines, heat converted into useful work is about A. 15% to 20% B. 25% to 45% C. 46% to 60% D. 60% to 80% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
