Q.1
Which of the following boiler works on a forced circulation of water?
Q.2
In an ideal impulse turbine, the
Q.3
The maximum discharge of steam through a convergent-divergent nozzle depends upon
Q.4
The variation of steam pressure in the nozzle depends upon
Q.5
The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)
Q.6
The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)
Q.7
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is
Q.8
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is
Q.9
Hard coke is produced by carburization of coal at
Q.10
The diagram efficiency is the ratio of
Q.11
The nozzle efficiency is the ratio of
Q.12
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
Q.13
When the nozzle operates with the maximum mass flow, the nozzle is said to be
Q.14
The specific heat of superheated steam in kcal/kg is generally of the order of
Q.15
Efficiency of a thermal cycle increases by
Q.16
The actual power generated in the engine cylinder is called
Q.17
The high steam and low water safety valve is not used in
Q.18
Which device is used in thermal power plants to reduce level of pollution?
Q.19
The pressure at which latent heat of vaporisation of water is zero, is
Q.20
The water tubes in a Babcock and Wilcox boiler are
Q.21
For combustion of a fuel, following is essential
Q.22
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)
Q.23
Which of the following statement is correct for a compound steam engine?
Q.24
The turbine blades are
Q.25
In locomotive boiler, maximum steam pressure is limited to
Q.26
Bomb calorimeter is used to determine
Q.27
In forced recirculation type boiler,
Q.28
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
Q.29
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
Q.30
The missing quantity per stroke is equal to
0 h : 0 m : 1 s