1. The maximum horse power of Fiat engine is around
Correct : C. 40 to 50
2. An air fuel ratio 8 will have
Correct : B. Excess fuel
3. Consumption of diesel in a diesel engine per BHP per hour is in the range
Correct : A. 185-210 gm
4. When a receiver is provided in a compound engine, it can be concluded that
Correct : C. The cranks are at 90? to each other
5. The emission of oxides of nitrogen in automobile exhaust will be least when the vehicle is
Correct : D. Idling
6. A gas turbine works on
Correct : A. Brayton cycle
7. Isolate the factor on which bursting pressure of boiler does not depend
Correct : D. Shear strength of shell material
8. Total solid impurities in feed water for a boiler depend upon
Correct : A. Boiler pressure
9. A cold short metal is
Correct : B. One that cannot be welded
10. The thermal efficiency of steam turbine can be increased by
Correct : D. All of the above
11. If the pressures at the beginning and end of compression in an Otto cycle engine are 1 kg/cm2 and 8 kg/cm2 respectively the air standard efficiency will be
Correct : D. 50%
12. In a reaction turbine which steam flows through the moving blades
Correct : B. Both velocity as well as pressure decreases
13. Which of the following functions reduces the irreversibility of a cycle?
Correct : C. regeneration
14. The intercept of Willian's line on Y-axis at the origin, gives
Correct : D. Idling speed
15. In a throttle governed single cylinder steam engine 5 I.H.P. is developed when steam consumption is 50 kg per hour and 2 I.H.P. is developed when the steam consumption is 26 kg per hour. The steam consumptions when the engine develops 4 I.H.P. will be
Correct : B. 42 kg
16. The efficiency of a jet propulsion unit is generally high at altitudes of
Correct : E. More than 10,000 metres
17. Which of the following is not used as ignition accelerator for diesel engine fuel?
Correct : B. Methyl alcohol
18. The ideal output velocity of steam from a nozzle having an enthalpy drop of 100 kcal/kg will be
Correct : D. 915 m/s
19. In a four stroke engine if a valve opens 25? before B.D.C. and closes 10? after T.D.C. the valve should be
Correct : E. Exhaust valve
20. If the air clearance is removed in a carburettor engine the fuel air ratio will be
Correct : B. Lower
21. A fan is being used under certain known conditions. If the speed of fan is doubled the air displaced by the fan
Correct : B. Will be doubled
22. The maximum temperature in a gas turbine is of the order of
Correct : A. 700?C
23. Which of the following is a part of reciprocating steam engine and not a part of steam turbine plant?
Correct : D. Cross head
24. For same output and same compression ratio four stroke SI engines as compared to two stroke engines have
Correct : C. Higher thermal efficiency
25. For the same temperature limits and heat input, the most efficient cycle is
Correct : A. Carnot
26. The power for the propulsion of ship is provided by
Correct : C. Either (A) and (B) above
27. The steam trap is used to
Correct : B. Separate condensate from steam
28. Piston ring are plated with chromium, cadmium or phosphate to
Correct : A. Reduce wear and eliminate scuffing
29. More test is conducted on
Correct : B. Multi-cylinder engines
30. In oil burners air is supplied
Correct : C. To improve combustion efficiency
31. In a compression ignition engine higher combustion chamber wall temperature will
Correct : A. Reduce knocking tendency
32. Clapeyron equation is applicable
Correct : D. For change of state when two phases are in equilibrium
33. In a system if base load is same as maximum demand, the load factor will be
Correct : A. 1
34. Reheating of steam for steam turbine cycle is done primarily to
Correct : D. Improve thermal efficiency of the plant
35. Morse test is conducted on
Correct : A. Multi-cylinder engines
36. Capacitor kVA required to bring the power factor of a 500 kW load 70% to 85% would be
Correct : E. 200 kVA
37. The function of a condenser in a steam power plant is
Correct : E. To reduce back pressure
38. For diatomic gas flowing through a nozzle the critical pressure ratio is given by
Correct : C. 3.546
39. Suri-transmission is
Correct : A. hydro-mechanical
40. The temperature of the blades of a gas turbine may be closer to
Correct : C. 1200?C
41. Compression ratio for diesel engines is generally in the range
Correct : D. 14 to 22
42. In case of pressure compounded impulse turbine, for the steam while flowing through the nozzle of second stage
Correct : A. Pressure drops while velocity increases
43. Which spark plug will have lower heat rating
Correct : C. W 95 T1
44. In a petrol engine fuel lock generally occurs in
Correct : D. Pump
45. As per IS specifications the endurance test for engines is conducted for
Correct : A. 500 hours
46. In a pumping installation the suction line is is 4 metre long and suction pipe diameter is 100 mm. Now if the suction pipe is replaced by a pipe combination consisting of 2 metres of 100 mm diameter pipe joined with 2 metres of 150 mm diameter pipe, the suction heat will become
Correct : B. 4 metres
47. Standard air is air at
Correct : A. Atmospheric conditions at any specific location
48. Which of the following is not needed in case of magneto ignition?
Correct : D. Battery
49. During detonation in a petrol engine
Correct : D. The rate of pressure rise is high
50. Volume of air at 27?C is 2 cu-m. What will be the volume at 327?C
Correct : C. 4 cu-m
51. The air standard efficiency of a Diesel engine depends on
Correct : E. Compression ratio
52. The size of a steam engine is 200 x 250 - 300 r.p.m. In this 200 indicates
Correct : E. Cylinder bore
53. In multistages turbines by introducting reheating
Correct : A. Thermal efficiency improves
54. In order to reduce wear and eliminate scuffing, piston ring in internal combustion engines are
Correct : E. Plated with chromium, cadmium or phosphate
55. The ends of piston rod in steam engines are connected to
Correct : D. Piston and cross-head
56. One horse power-hr is equal to
Correct : B. 632 kcal
57. Which of the following boiler uses exhaust of the engine to produce draught?
Correct : E. Locomotive boiler
58. In jet engine the compression ratio
Correct : C. Varies as square of speed
59. Pour point is the temperature at which oil
Correct : C. Barely flows
60. Which one of the following factors will not assist in smooth running of a compression ignition engine?
Correct : D. High ignition temperature of fuel
61. In case of an opposed piston engine the combustion chamber
Correct : B. Is formed between two piston tops
62. Specific heat is
Correct : C. The ratio of quantity of heat required to raise the temperature of a given weight of any substance through 1?C to the quantity of heat required to raise the temperature of same weight of water through 1?C
63. In a diesel engine the injection pressure is of the order of
Correct : B. 100 kg/cm2
64. If a water cooled compressor knocks during operation, the probable cause cannot be
Correct : D. Excess cooling in intercooler
65. Thermal efficiency of a compression ignition engine may be of the order of
Correct : A. 35%
66. In centrifugal pumps suction head is
Correct : C. (A) Above less velocity heat
67. Maintenance requirements are least in case of
Correct : A. Electric locomotives
68. The higher the temperature required to ignite diesel fuel,
Correct : C. Lower the cetane number
69. In pumped storage systems, water is pumped
Correct : B. Upstream during off peak periods
70. The supercharging of diesel engine is done mainly to
Correct : C. Increase the power output
71. In Eicher tractor the engine is
Correct : A. Air cooled
72. Air fuel ratio in a petrol engine fitted with dirty air cleaner as compared to that with clean air clearance will be
Correct : C. Lower
73. Crankshafts are generally
Correct : D. Forged
74. In a condensing steam engine
Correct : A. Exhaust steam is condensed in condenser
75. The Apparatus used for the determination of calorific value of solid fuel is
Correct : C. Bomb calorimeter
76. Stuffing box is provided in
Correct : E. Double acting steam engines
77. An exciter is a
Correct : B. D.C.generator
78. An engine operates at 1440 rpm under load whereas no load speed is 1500 rpm. The percentage speed drop of governor will be
Correct : C. 4%
79. In a Bomb calorimeter the fuel to be tested is burnt
Correct : A. At constant volume
80. Which fuel will have least air consumption during combustion
Correct : A. Spirit
81. Movement of air inside engine cylinder does not help in
Correct : D. Reducing noise
82. In a Lancashire boiler, the economiser is located
Correct : A. Before air preheater
83. Iso-octane has octane number of
Correct : A. 100
84. Freezing point of petrol is around
Correct : B. ?30?C
85. 1 Torr is equivalent to
Correct : A. 1 mm Hg
86. The most effective air cleaner for diesel engines is
Correct : B. Oil bath type
87. An economiser is installed in a boiler plant primarily to
Correct : E. Reduce fuel consumption
88. The equilibrium conditions between supersaurated vapour and a cooled liquid surface are expressed in
Correct : C. Kelvin Helmhotz equation
89. Most of the heat generated in I.C. engines is transferred to surrounding medium by
Correct : C. Conduction and convection
90. Vapour lock is
Correct : C. Complete or partial stoppage of fuel supply due to vaporisation of fuel in supply steam
91. The steam pressure in a pass out turbine may be expected to be in the range
Correct : A. 10 kg/cm2 to 20 kg/cm2
92. A regenerator in a gas turbine
Correct : C. Improves thermal efficiency
93. Higher proportion of residual gases in the cylinder would mean
Correct : B. Lower volumetric efficiency
94. Low grade fuels have
Correct : C. Low calorific valve
95. A gas turbine cycle with regenerator has a thermal efficiency of 26%. If intercooler and reheater are also introduced what could be expected thermal efficiency
Correct : E. 30%
96. Free piston engines find application in
Correct : C. Gas turbines
97. In case of supersonic flow through the nozzle, when the cross-section increases in the direction of flow
Correct : C. The velocity will increase while the pressure will decrease in the direction of flow
98. The performance of air compressor at high altitudes as compared to that at sea level will be
Correct : E. Inferior
99. To avoid moisture trubles, the branch connection from compressed air line are taken from
Correct : A. Top side
100. Which turbine has identical fixed and moving blades