11) Power required by Fan in forced draught is …… to that of induced draught
a) less
b) more
c) same
d) none of these
12)Carnot cycle comprises of
(a) two isentropic processes and two constant volume processes
(b) two isentropic processes and two constant pressure processes
(e) two isothermal processes and three constant pressure processes
(d) none of the above
13) Thermal efficiency of steam power plant is maximum at boiler pressure of
a) 120 bar
b) 146 bar
c) 166 bar
d) 156 bar
14)Economiser is used to heat
(a) air
(b) feed water
(c) flue gases
(d) all above
15) Rankine cycle efficiency of a good steam power plant in the range of
a) 20 to 25%
b) 35 to 45%
c) 10 to 20%
d) >50%
16) Heating of dry steam above saturation temperature is known as
a) Enthalpy
b) Super heating
c) Latent heating
d) Super saturation
17) In the Rankine cycle, the heat rejection process takes place at constant
a) enthalpy
b) volume
c) pressure
d) entropy
18) Maximum steam pressure in a locomotive boiler is limited to
a) 9 bar
b) 10 bar
c) 18 bar
d) 22 bar
19) Which of the following is not a safety valve for the boilers ?
a) lever type
b) sliding type
c) dead weight type
d) spring type
20) Lancashire boiler is a _______ boiler
a) single pass
b) two pass
c) three pass
d) four pass