2. Thermodynamic equilibrium is completely defined by the specifications of the
Correct : D. All above together
3. Within the boiler the temperature of steam is highest in
Correct : C. Superheater outlet
4. A closed vessel contains air at 1.2 ata and 57?C. The pressure of air in the vessel if the contents of the vessel are cooled to 37?C would be
Correct : B. 1.127 ata
5. Which one of the following acts as ignition accelerator for C.I. engines fuel
Correct : A. Acetone peroxide
6. Paraffins in petrol have the general formula
Correct : B. Cn H2n + 2
7. If an air cooled compressor gets over-heated during operation, the probable cause cannot be
Correct : C. Leadage in intercooler
8. The phenomenon of hunting is associated with
Correct : A. Governors
9. The term regeneration is closely associated with
Correct : B. Steam turbines
10. The air standard efficiency of a turbine cycle is 56.5%, which one of the following may be Carnot efficiency between the temperature limits of the cycle?
Correct : B. 64%
11. A wankel engine is
Correct : A. Rotory engine
12. The temperatures and pressures for boiler are given below. Which of these boilers can be classified as super-critical pressure boiler?
Correct : E. 218 kg/cm2, 540?C
13. Motor cycle not using deflector type piston usually utilise
Correct : A. Reverse flow scavanging
14. Direction of feed water is done because
Correct : C. It reduces corrosion caused by oxygen present in air
15. The dryness fraction of steam within a turbine is usually not allowed to fali below
Correct : D. 0.9
16. Which of the following is an accessory for a boiler?
Correct : D. Feed pump
17. The molecules move in a solid
Correct : B. Back and forth like tiny pendulum
18. In all a four stroke four cylinder engine will have how many valves?
Correct : A. 8
19. Latent heat is
Correct : A. Heat required to change the state or condition under which the substance exists
20. Steam consumption per kWh of electricity generated in a modern power plant is of the order of
Correct : B. 5 - 7 kgs
21. In jet engines the compression ratio
Correct : A. Varies with square of speed
22. An Orsat's apparatus is used for
Correct : C. Volumetric analysis of the flue gas
23. Motoring test on I.C. engines is conducted to measure
Correct : D. Friction horse power
24. The turbidity in boiler feed water causes
Correct : A. Sludge
25. Steam leaves the steam nozzle at
Correct : B. Low pressure and high velocity
26. In diesel engines thermal efficiency may be expected in the range
Correct : A. 35 to 40 percent
27. In reciprocating air compressor, the method of controlling the quantity of air delivered is done by
Correct : D. All of the above
28. Motor cycles generally have
Correct : E. Air cooled engines
29. Crankcase dilution is
Correct : B. Dilution of lubricating oil in crankcase
30. In an analysis report of a sample of coal the percentage of one of the constituents is specified as 3.5%. This constituent could be
Correct : D. Sulphur
31. A plant costing Rs. 80,000 has a useful life of 12 years. The amount that should be saved annually to replace the equipment at the end of useful life with salvage value of Rs. 8,000 should be
Correct : C. Rs. 6000
32. In a spark ignition engine supercharging
Correct : C. Increases knocking tendency
33. A passout turbine generally operates on low pressure in the range
Correct : A. 10 - 20 kg/cm2
34. In a reaction turbine while steam flows through the fixed blades
Correct : C. Velocity increases while pressure drops
35. For steam engine having a throttle governor, a straight line is obtained when the total weight of steam used per hour is plotted against the indicated horse power. This line is known as
Correct : A. Willian's line
36. Ignition accelerators are used primarily to
Correct : C. Reduce combustion knock
37. A gas turbine power plant suits as
Correct : A. Peak load plant
38. In diesel engines, the accumulation of carbon in the cylinder increases
Correct : D. Effective compression ratio
39. Which of the following is the internal loss of a turbine?
Correct : B. Blade friction loss
40. Which of the following is not a property of carbondioxide?
Correct : D. Pungent odour
41. A heat exchanger that can remove fixed quantity of heat from a system is available where should it be installed for best economy
Correct : E. Prior to first stage compression
42. A fan is being operated in an environment for which information is available. Now if the fan speed is doubled, how will the static pressure vary
Correct : E. Four times
43. A 50 cfm compressor can
Correct : A. Compress 50 cu feet per min of free air
44. A perfect heat engine works on the Carnot cycle between 1000?C and 200?C. The efficiency of the engine will be
Correct : C. 62.80%
45. A gas turbine works on
Correct : B. Brayton cycle
46. In power station practice 'spinning reserve' is
Correct : B. Reserve generating capacity that is connected to bus and ready to take load
47. Ash content of a diesel fuel oil should not exceed
Correct : D. 0.01%
48. Injector is used to
Correct : D. Inject water boiler
49. A barn is a
Correct : C. Unit of area
50. High steam and low water safety valve is not used on which of the following boiler?
Correct : A. Locomotive boiler
51. Change in internal energy is least during
Correct : E. Isothermal process
52. Which of the following is not a petroleum product?
Correct : A. Methylated spirit
53. Thermal efficiency of a standard Otto cycle for a compression ratio 5.5, will be
Correct : E. 50%
54. The calorific value of methane can be determined by
Correct : E. None of the above
55. The fact that the product of pressure and volume of a fixed amount of gas is approximately a constant value is known as
Correct : E. None of the above
56. Air fuel ratio for a jet engine is of the order of
Correct : A. 60;1
57. A steam nozzle is said to be choked when
Correct : E. Pressure at throat is less than the exit pressure
58. In a four stroke cycle the minimum temperature inside the engine cylinder occurs
Correct : B. At the end of suction stroke
59. According to Charle's law
Correct : A. At constant pressure the volume of a gas is proportional to its absolute temperature
60. Prony brakes are used for testing
Correct : D. Small engines
61. In wet dry lubrication of diesel engines
Correct : C. Oil is pumped to various points
62. In a velocity compounded impulse turbine, while steam flows through the second row of moving blades
Correct : B. The velocity reduces
63. Ignition accelerators are often used for
Correct : B. Petrol engine fuels
64. Which one of the following statements is incorrect
Correct : D. All of the above
65. During idling in a compression ignition engine the air fuel ratio may be of the order of
Correct : E. 30
66. Solid injection in diesel engines implies
Correct : E. Injecting fuel without air
67. Which fuel has maximum resistance to detonation
Correct : D. Iso-octane
68. The level of oil in engine cylinder should be checked when the engine is
Correct : A. Not running
69. The molecular weight of a mixture containing 20% oxygen, 20 percent nitrogen and 60 percent carbon dioxise on volume bases will be nearly
Correct : A. 38.4
70. Dissociation is
Correct : B. Same is combustion
71. Thermodynamic processes are those
Correct : A. Where a difference is observed in any macroscopic property of the system between different times or state
72. A Lungistrom turbine is a
Correct : A. Radial flow reaction turbine
73. Highest useful compression ratio is the compression ratio at which
Correct : D. Detonation first becomes audible
74. The pour point of diesel fuel oil must be
Correct : C. Less than the coldest atmospheric temperature of which oil is to be pumped
75. The emission of carbon monoxide in automobile exhaust will be low when the vehicle is
Correct : D. Cruising at high speeds
76. In a four stage compressor system first and third stage pressures are 1 and 9 kg/cm2 respectively. What will be the fourth stage delivery pressure
Correct : B. 81 kg/cm2
77. In a lead cell battery the voltage per cell is
Correct : D. 2 volts
78. Ignition quality of diesel fuel is expressed by
Correct : B. Cetane number
79. The use of Wilson's line for flow calculation is associated with
Correct : D. Steam-nozzles
80. Rateau turbine is a
Correct : D. Pressure compounded impulse turbine
81. Centrifugal blowers can supply
Correct : A. Large volumes of air at low pressures
82. To augment the thrust of jet propulsion units part of the fuel is burned in the exhaust. How does this fuel burn
Correct : E. Fuel finds oxygen from excess air supplied to engine
83. Intake air filters are provided on air compressor for
Correct : A. Removing dirt and dust from suction air
84. Which one of the following factors will not assist in getting high power output from a compression ignition engine
Correct : D. Large quantity of excess air
85. The lowest temperature upto which a mercury thermometer can be used is
Correct : A. ? 39?C
86. In case of a condensing turbine the pressure in the last stage of the turbine is
Correct : D. Less than the atmospheric pressure
87. The blades of a turbine are made of
Correct : D. Nickel alloy
88. The frictional horse power of a well adjusted petrol engine should be nearly
Correct : E. 10%
89. LPG stands for
Correct : A. Liquefied petroleum gas
90. The term scavanging is generally associated with
Correct : D. Two stroke engines
91. Solubility of a gas in a liquid at small concentration is represented in
Correct : A. Henry's law
92. The engine provided on scooters is generally
Correct : D. Two stroke, air cooled
93. The instrument used for the measurement of area of p-v diagram is known as
Correct : C. Planimeter
94. If in a compression ignition engine the noise level is to be reduced, the design features which will not be affected are
Correct : D. Fuel injection equipment
95. For dry saturated steam the value of adiabatic index n is taken as
Correct : A. 1.135
96. In a petrol engine the mixture strength for maximum power is
Correct : E. 1 ; 13
97. The main purpose of compounding in case of steam turbines is to
Correct : D. All of the above
98. Which of the following is not the same as watt?