Question 41 : Power is produced when the working fluid does some work on the?
1. Shaft
2. Fins
3. Blades
4. None of the mentioned
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Question 42 : Rankine cycle comprises of
1. two isentropic processes and two constant volume processes
2. two isentropic processes and two constant pressure processes
3. two isothermal processes and two constant pressure processes
4. none of the mentioned
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Question 43 : In a regenerative feed heating cycle, the greatest economy is affected
1. when steam is extracted from only one suitable point of steam turbine
2. when steam is extracted from several places in different stages of steam turbine
3. when steam is extracted only from the last stage of steam turbine
4. when steam is extracted only from the first stage of steam turbine
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Question 44 : The following is (are) the limitation(s) of gas turbines.
1. They are not self-starting
2. Higher rotor speeds
3. Low efficiencies at part loads
4. All of the mentioned
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Question 45 : Temperature of heat rejection in a condenser can be lowered by using?
1. lubricant
2. oil
3. refrigerant
4. diesel
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Question 46 : Which among these is the main component of a gas turbine plant?
1. Condenser
2. Compressor
3. Boiler
4. Both (b) & (c)
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Question 47 : The specific heat of the ideal working fluid used in vapour power cycle
1. should be constant
2. should be large
3. should be small
4. none of the mentioned
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Question 48 : In Rankine cycle the work output from the turbine is given by
1. change of internal energy between inlet and outlet
2. change of enthalpy between inlet and outlet
3. change of entropy between inlet and outlet
4. change of temperature between inlet and outlet
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Question 49 : Rankine cycle efficiency of a good steam power plant may be in the range of
1. 15 to 20%
2. 35 to 45%
3. 70 to 80%
4. 90 to 95%
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Question 50 : In gas turbine, the function of Re-heater is to
1. Heat inlet air
2. Heat exhaust gases
3. Heat air coming out of compressor
4. Heat gases coming out of high pressure turbine
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