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Engineering :: Heat Engines

91.  Ignition quality of diesel fuel is expressed by
A. Octane number B. Cetane number
C. Carbon percentage D. Calorific value
E. None of the above    
92.  Water and sediments in a diesel fuel oil must not exceed.
A. 1% B. 0.50%
C. 0.10% D. 0.05%
E. 0.01%    
93.  Ash content of a diesel fuel oil should not exceed
A. 1% B. 0.50%
C. 0.10% D. 0.05%
E. 0.01%    
94.  Flash point for diesel fuel oil should be
A. Minimum 49?C B. Maximum 49?C
C. Maximum 100?C D. Maximum 200?C
E. None of the above    
95.  Compression ratio in case of gas engines waries in the range
A. 5 to 10 B. 10 to 15
C. 15 to 20 D. 20 to 24
E. 24 to 30    
96.  The compression ratio in case of a gas turbine is of the order of
A. 5 B. 7
C. 12 D. 20
E. 24    
97.  The maximum temperature in a gas turbine is of the order of
A. 700?C B. 1000?C
C. 1500?C D. 2000?C
E. 2500?C    
98.  A regenerator in a gas turbine
A. Reduces heat loss in exhaust B. permits use of higher compression ratio
C. Improves thermal efficiency D. Permits use of fuels of inferior quality
E. None of the above    
99.  Compression ratio for spark ignition engines varies in the range
A. 4 to 6 B. 6 to 12
C. 12 to 20 D. 20 to 25
E. 25 to 30    
100.  Octane number of petrol generally available is in the range
A. 10 to 25 B. 25 to 60
C. 20 to 75 D. 80 to 100
E. 55 to 65    

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