This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Turbine Blading – I”.
1. In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is ____________
a) very high
b) high
c) low
d) very low
View Answer
Explanation: In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is very high.
2. Steam turbines may be classified according to ____________
a) number of stages
b) direction of steam flow
c) mode of steam action
d) all of the mentioned
View Answer
Explanation: The steam turbines are classed under various types based on number of stages, direction of steam flow, mode of steam action, etc.
3. A steam nozzle converts ____________
a) heat energy of steam into kinetic energy
b) kinetic energy of steam into heat energy
c) potential energy into heat energy
d) none of the mentioned
View Answer
Explanation: A steam nozzle converts heat energy of steam into kinetic energy.
4. In a velocity compounded impulse turbine, when steam flows through the second row of moving blades ____________
a) velocity decreases
b) velocity increases
c) pressure decreases
d) pressure increases
View Answer
Explanation: In a velocity compounded impulse turbine, when steam flows through the second row of moving blades, the velocity decreases.
5. In a reaction turbine when the degree of reaction is zero, then there is ____________
a) no heat drop in moving blades
b) maximum heat drop in fixed blades
c) no heat drop in fixed blades
d) maximum heat drop in moving blades
View Answer
Explanation: In a reaction turbine when the degree of reaction is zero, then there isn’t any heat drop in moving blades.
6. The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as?
a) regenerative heating
b) reheating of steam
c) bleeding
d) none of the mentioned
View Answer
Explanation: The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as Bleeding.
7. Turbo alternators run at speeds ____________
a) constant speed of 3000 rpm
b) constant speed of 1000 rpm
c) variable speed of 1000 rpm
d) none of the mentioned
View Answer
Explanation: The turbo alternators run at speeds varying in 1000 rpm.
8. In an impulse reaction turbine, the pressure drops gradually and continuously over ____________
a) moving blades
b) fixed blades
c) both moving & fixed blades
d) none of the mentioned
View Answer
Explanation: The pressure drops gradually & continuously over both moving & fixed blades in an impulse turbine.
9. A steam turbine with no nozzle is?
a) Reaction Turbine
b) Impulse Turbine
c) Reaction & Impulse Turbines
d) None of the mentioned
View Answer
Explanation: Reaction turbine is basically a steam turbine without any nozzle.
10. The pipes carrying steam are made up of?
a) Steel
b) Copper
c) Aluminium
d) Iron
View Answer
Explanation: The pipes carrying steam in a steam turbine are made up of Steel.
Sanfoundry Global Education & Learning Series – Power Plant Engineering.
To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
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