simple reaction turbine
velocity compounded turbine
pressure compounded turbine
pressure-velocity comp
✅ The correct answer is option D.
Steam Nozzles and Turbines MCQs
82. The reheat factor depends upon
initial pressure and superheat
exit pressure
turbine stage efficiency
all of these
✅ The correct answer is option D.
83. The ratio of the isentropic heat drop to the heat supplied, is called
reheat factor
stage efficiency
internal efficiency
Rankine efficiency
✅ The correct answer is option D.
84. The ratio of the cumulative heat drop to the isentropic heat drop is called reheat factor.
Yes
No
✅ The correct answer is option A.
85. The process of maintaining the speed of the turbine constant for various load conditions, is known as
bleeding
reheating
governing
none of these
✅ The correct answer is option C.
86. The ratio of the energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam is called mechanical efficiency.
Yes
No
✅ The correct answer is option B.
87. 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)
Vb = 0.5 V cos α
Vb = V cos α
Vb = 0.5 V2 cos α
Vb = V2 cosα
✅ The correct answer is option A.
88. The critical pressure ratio for gases is
0.528
0.546
0.577
0.582
✅ The correct answer is option A.
89. A stage, in reaction turbine, is represented by
number of casing
number of entries of steam
number of exits of steam
each row of blades
✅ The correct answer is option D.
90. The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)
sin2 α
cos2 α
tan2 α
cot2 α
✅ The correct answer is option B.