• ( 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
    • Discussion in forum
      Answer : 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.
    • Discussion in forum
      Answer : 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
    • Discussion in forum
      Answer : 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
    • Discussion in forum
      Answer : 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
    • Discussion in forum
      Answer : 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 (ηRankine) 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
    • Discussion in forum
      Answer : 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
    • Discussion in forum
      Answer : 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
    • Discussion in forum
      Answer : 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) 0.2-0.3
    • 2) 0.5-0.6
    • 3) 1
    • 4) 0.6-0.8
    • Discussion in forum
      Answer : 4) 0.6-0.8
      Solution :








      discussion


      Answer : 4) 0.6-0.8

    • ( 10 ) A gas turbine works on?

    • 1) Carnot cycle
    • 2) Brayton cycle
    • 3) Dual cycle
    • 4) Rankine cycle
    • Discussion in forum
      Answer : 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





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