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( 1 ) For the same compression ratio, the efficiency of dual combustion cycle is
 1) greater than otto cycle
 2) less than diesel cycle
 3) less than otto cycle and greater than diesel cycle
 4) greater than both otto and diesel cycle

Show Answer Report Discussion in forumAnswer : 3) less than otto cycle and greater than diesel cycle
Solution :
discussion
Answer : 3) less than otto cycle and greater than diesel cycle



( 2 ) The frictional power (F.P) is given by
 1) F.P. = B.P.I.P.
 2) F.P. = I.P.B.P.
 3) F.P. = B.P./I.P.
 4) F.P. = I.P./B.P.

Show Answer Report Discussion in forumAnswer : 2) F.P. = I.P.B.P.
Solution : he frictional power is the difference between indicated power and brake power. So Mathematically,F.P = I.P.B.P
discussion
Answer : 2) F.P. = I.P.B.P.



( 3 ) Types of absorption dynamo meters are
 1) prony brake
 2) rope brake
 3) hydraulic brake
 4) all of the mentioned

Show Answer Report Discussion in forumAnswer : 4) all of the mentioned
Solution :
discussion
Answer : 4) all of the mentioned



( 4 ) As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
 1) increase maximum pressure and maximum temperature
 2) decrease maximum pressure and maximum temperature
 3) increase maximum pressure and decrease maximum temperature
 4) decrease maximum pressure and increase maximum temperature

Show Answer Report Discussion in forumAnswer : 2) decrease maximum pressure and maximum temperature
Solution : In actual working, as compared to air standard cycle, the effect of variation in specific heats is to decrease maximum pressure and maximum temperature.
discussion
Answer : 2) decrease maximum pressure and maximum temperature



( 5 ) The most accurate gasoline injection system is
 1) direct injection
 2) port injection
 3) throttle body injection
 4) manifold injection

Show Answer Report Discussion in forumAnswer : 2) port injection
Solution : Of all the gasoline injection system, the most accurate gasoline injection system is port injection.
discussion
Answer : 2) port injection



( 6 ) The maximum efficiency of Rankine cycle (η_{Rankine}) is the function of
 1) the mean temperature of heat addition (Tm) only
 2) the mean temperature of heat addition (Tm) and temperature of steam at the exit of the turbine
 3) the mean temperature of heat addition (Tm) and temperature of steam at the entry of the turbine
 4) the mean temperature of heat addition (Tm) and temperature of steam at exit of the condenser

Show Answer Report Discussion in forumAnswer : 1) the mean temperature of heat addition (Tm) only
Solution :
discussion
Answer : 1) the mean temperature of heat addition (Tm) only



( 7 ) Time loss factor in Actual Cycle is due to
 1) progressive combustion
 2) heat loss through cylinder walls
 3) gas leakage
 4) friction

Show Answer Report Discussion in forumAnswer : 1) progressive combustion
Solution :
discussion
Answer : 1) progressive combustion



( 8 ) Optimum spark timing gives
 1) higher mean effective pressure
 2) higher efficiency
 3) higher mean effective pressure and higher efficiency
 4) none of these

Show Answer Report Discussion in forumAnswer : 3) higher mean effective pressure and higher efficiency
Solution :
discussion
Answer : 3) higher mean effective pressure and higher efficiency



( 9 ) The ratio of the actual efficiency and the and the fuel air cycle efficiency for C.I. engines is about
 1) 0.20.3
 2) 0.50.6
 3) 1
 4) 0.60.8

Show Answer Report Discussion in forumAnswer : 4) 0.60.8
Solution :
discussion
Answer : 4) 0.60.8



( 10 ) A gas turbine works on?
 1) Carnot cycle
 2) Brayton cycle
 3) Dual cycle
 4) Rankine cycle

Show Answer Report Discussion in forumAnswer : 2) Brayton cycle
Solution : A gas turbine works on 2 isentropic and 2 isobaric processes which is nothing else but Brayton cycle
discussion
Answer : 2) Brayton cycle
