51. Coefficient of friction between the correctly inflated tyre of a jeep and the icy surface of Srinagar in Jammu and Kashmir is about A. 0.01 B. 0.55 C. 111.3 D. 0.10 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
52. The air resistance is directly proportional to the square of the vehicle speed. 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
53. A frictionless heat engine can be 100% efficient only if its exhaust temperature is A. Eual to its input temperature B. Less than its input temperature C. 0°C D. 0 K Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
54. The amount of heat energy equivalent lost in overcoming engine friction is A. 30% B. 20% C. 15% D. 5% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
55. On many engines, the valve timing can be checked by means of marking on the A. Engine fly wheel B. Valve guide C. Vibration damper D. Valve cover 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
56. Brake thermal efficiency of SI engines is in the range of A. 35% to 60% B. 25% to 35% C. 60% to 80% D. None of the above 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
57. Turbocharger engines are those in which charge density is increased by A. Separate air compressors B. Compressors driven by exhaust gas turbine C. Cooling inlet air D. None of the above 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
58. The ratio of brake power output to the fuel energy input per unit time is called: A. Volumetric efficiency B. Thermal efficiency C. Mechanical efficiency D. Relative efficiency 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
59. Thermal efficiency of a two stroke cycle engine is . . . . . . . . a four stroke cycle engine. A. Less than B. Greater than C. Equal to D. Greater than or equal to 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
60. A fully charged 6 cell automotive battery should indicate: A. 12 V B. 12.6 V C. Specific gravity of 1.290 at 32°C D. Both B and C Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board