1. The range of mechanical efficiency for automobile is
Correct : C. 70-80%
2. The measurement of fractioned power by Willans line is applicable to
Correct : B. si engine at particular speed
3. Morse test is only applicable to
Correct : C. multicylinder ci engine
4. The most accurate method of determining friction power is by
Correct : D. measurement of brake and indicated power
5. In the air base method of measuring air flow, the air base is provided to
Correct : C. have a constant flow
6. The air box/swept volume ratio should be in the range for single cylinder engine
Correct : C. 500-600%
7. The best method of measuring speed is by
Correct : A. mechanical tachometer
8. flame ionization detector is used for measuring
Correct : A. hc
9. Chemilumme scene analyzer is used for measuring
Correct : C. nox
10. Non disprasive infrared analyzer is widely accepted instrument for measuring
Correct : B. carbon monoxide
11. If n is the rpm, number of power strokes per minute in a four stroke engine is
Correct : A. n/2
12. If n is the rpm, number of power strokes per minute in a two stroke engine is
Correct : B. n
13. mechanical efficiency is the ratio of
Correct : C. brake power to indicated power
14. volumetric efficiency is a measure of
Correct : C. breathing capacity of the engine
15. thermal efficiency varies
Correct : A. inversely as specific fuel consumption
16. The spark timing and combustion rate should be such that
Correct : A. one half of the total pressure occurs at tdc
17. Indicated power is directly proportional to
Correct : A. air consumption
18. The brake thermal efficiency of SI engine is in the range of
Correct : B. 25-35
19. Performance m ep shows
Correct : C. bmep vs piston speed under various condition
20. If performance of SI engine of different manufacturer having different capacities size and systems are to be compared, the common parameter would be
Correct : D. mep
21. Endurance test for IC engine is conducted for
Correct : D. 500 hrs
22. Which of the following factor will not assist in improving thermal efficiency of a CI engine
Correct : D. high surface to volume ratio
23. which statement is correct
Correct : C. conducted only on multicylinder engines
24. Rope brake dynamometer falls under the category of
Correct : D. mechanical friction type dynamometer
25. Prony brakes are used for testing
Correct : A. small engine
26. Which of the following is performed for super charging of IC engine?
Correct : B. axial flow compressor
27. From the engine indicator diagram we obtain
Correct : A. imep
28. Most accurate dynamometer is
Correct : C. swinginf field type
29. Most commonly used dynamometer on account of its simplicity of construction is the
Correct : A. brake type
30. bmep in an engine depends up on its
Correct : B. torque only
31. Brake thermal efficiency of SI engine usually varies between
Correct : A. 25-30 %
32. The brake power is the
Correct : A. power available at the output shaft
33. The total power developed by the combustion of fuel is
Correct : B. ip
34. Mean effective pressure is the pressure
Correct : B. which is acting on the piston throughout the power stroke
35. Fuel Air ratio is
Correct : D. all of the above
36. specific fuel consumption is
Correct : A. amount of fuel consumed per unit power developed per hour
37. Heat balance sheet indicates
Correct : B. brake up of the total energy input into different parts
38. The frictional power is
Correct : B. bp- ip
39. Identify the correct statement
Correct : B. lower friction means more brake power
40. Willians line method is applicable to
Correct : A. si
41. The ratio of indicated thermal efficiency to the air std cycle efficiency is called
Correct : C. relative efficiency
42. As compare to winter, during summer, volumetric efficiency of IC engine will
Correct : B. decrease
43. Pick up the wrong statement
Correct : D. supercharging results in to fuel economy
44. The ratio of BP to IP of an engine is
Correct : C. mechanical efficiency
45. Volumetric efficiency of supercharged engine is
Correct : C. greater than 1
46. volumetric efficiency of naturally aspirated engine is
Correct : D. less than 1
47. The mean effective pressure indicates the
Correct : C. average pressure
48. The ratio of BMEP to IMEP is called
Correct : A. mechanical efiiciency
49. The powern actually developed by the engine is called
Correct : C. ip
50. The BP of diesel engine, keeping other parameters constant, can be increased by
Correct : C. increasing the pressure of intake air
51. Motoring test is carried out on an IC engine to determine