A. reduce hardness and for removal of solids
B. increase efficiency-of thermal power plant
C. increase *heat transfer rate
D. increase steam parameters
E. all of the above
Related Mcqs:
- Thermal efficiency of a thermal power plant is of the order of___________________?
A. 15%
B. 20%
C. 30%
D. 45%
E. 60%. - Which device is used in thermal power plants to reduce level of pollution___________________?
A. induced draft fan
B. smoke meter
C. chimney
D. precipitator
E. pulveriser - Equivalent evaporation of water is the evaporation “for a feed water supply at 100°C__________________?
A. and its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2
B. and its corresponding conversion into dry steam at desired boiler pressure
C. conversion into steam at atmospheric condition
D. conversion into steam at the same pres-sure at which feed water is supplied
E. none of the above - The basic job of feed water treatment in boilers is to overcome the problem of __________________?
A. corrosion
B. scale
C. carryover
D. embrittlement
E. all of the above - Deaeration of feed water is carried out because it reduces ____________________?
A. cavitation of .boiler feed pumps
B. corrosion caused by oxygen
C. heat transfer coefficient
D. pH value of water
E. weight of water to be handled - The coal requirement per kW hour generation in the thermal power plant is of the order of__________________?
A. 0.1 to 0.2 kg
B. 0.2 to 0.4 kg
C. 0.6 to 0.8 kg
D. 1.0 to 1.5 kg
E. 1.5 to 2 kg - The biggest size of thermal power unit operating in India is ________________?
A. 30 MW
B. 60 MW
C. 100 MW
D. 210 MW
E. 500 MW - The overall efficiency of thermal power plant is________________?
A. boiler efficiency, turhine efficiecny, generator efficiency
B. all the three above plus gas cycle efficiency
C. carnot cycle efficiency
D. regenerative cycle efficiency
E. rankine cycle efficiency - If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton’s law, the pressure in condenser is equal to__________________?
A. Ps-Pa
B. pa-ps
C. Pa+P
D. non of these - The change in internal energy in steam engines equals to__________________?
A. work done during the rankine cycle ;
B. work done during compression.
C. work done during adiabatic expansion
D. change in enthalpy
E. none of the above
