Steam Turbines Questions and Answers
Steam Turbines Questions and Answers
1. Steam turbine is _________ combustion thermal prime mover
a) Internal
b) External
c) Both internal and external
d) None of the above
Answer: External
2. The efficiency of steam turbine may be improved by _________
a) Reheating of steam
b) Regenerative feed heating
c) Binary vapour plants
d) Any of the above
Answer: Any of the above
3. The action of steam in a steam turbine is _________
a) Static
b) Dynamic
c) Static and dynamic
d) Neither static nor dynamic
Answer: Dynamic
4. The reheating of steam in a turbine _________
a) Increases the workdone through the turbine
b) Increases the efficiency of the turbine
c) Reduces wear on the blades
d) All of the above
Answer: All of the above
5. The thermal efficiency of a steam turbine is _________ than that of steam engine
a) Lower
b) Higher
c) Same
d) None of the above
Answer: Higher
6. Non Condensing steam turbine can also be called as _________
a) Extraction steam turbine
b) Back pressure steam turbine
c) Impulse steam turbine
d) None of the mentioned
Answer: Back pressure steam turbine
7. Impulse blades are in the shape of __________
a) Rain drop
b) Circular
c) Half moon
d) None of the mentioned
Answer: Half moon
8. Condensing turbine is used for __________
a) central power generation
b) to reduce outlet temperature
c) to increase efficiency of steam
d) none of the mentioned
Answer: central power generation
9. High pressure turbine is a Non-Condensing turbine due to __________
a) exhaust conditions
b) axial flow of the steam
c) pressure-velocity compounding
d) velocity compounding
Answer: exhaust conditions
10. When steam reaches turbine blades the type of force responsible for moving turbine blades are _____________
a) Axial force
b) Shear force
c) Longitudinal force
d) None of the mentioned
Answer: Axial force
11. Astern turbines are used in _________
a) power generation
b) marine purposes
c) aircraft
d) none of the mentioned
Answer: marine purposes
12. In condensing turbines vacuum is obtained by ____________
a) sudden pressure drop
b) removal of non condensable gases
c) sudden drop in pressure and by removal of non condensable gases
d) none of the mentioned
Answer: sudden drop in pressure and by removal of non condensable gases
13. Cross compound steam turbines are once used in _____________
a) generation of electricity
b) marine ships
c) automobiles
d) none of the mentioned
Answer: marine ships
14. Steam turbine is classified on basis of __________
a) type of blades
b) exhausting condition
c) type of Steam flow
d) all of the mentioned
Answer: all of the mentioned
15. Reaction turbine works with the force obtained from change in pressure energy.
a) True
b) False
Answer: True
Working of a Steam Turbines Multiple Choice Questions
1. Energy efficiency of superficial steam is _________
a) low
b) high
c) same as other steams
d) none of the mentioned
Answer: high
2. Superficial steam turbines releases _______ CO2.
a) high
b) low
c) does not release
d) none of the mentioned
Answer: high
3. In double acting steam engine pressure acts on the ________
a) Cylinder
b) both sides of the valves.
c) Steam turbine
d) none of the mentioned
Answer: both sides of the valves.
4. When steam pressure ________ it becomes superficial fluid.
a) Decreases
b) Increases
c) Steam can not become superficial fluid
d) None of the mentioned
Answer: Increases
5. Superficial steam turbines can be operated at ________
a) medium speeds
b) low speeds
c) high speeds
d) none of the mentioned
Answer: high speeds
6. ________ and pressure of the superficial steam are at critical points.
a) Specific heat
b) Volume
c) Temperature
d) None of the mentioned
Answer: Temperature
7. Steam turbines used in nuclear reactors use __________
a) Superficial fluids
b) High pressure steam
c) Specific heat
d) None of the mentioned
Answer: Superficial fluids
8. _______ extracts heat from the working fluid
a) Boiler
b) turbine
c) Steam turbine
d) None of the mentioned
Answer: Boiler
9. _______ of electricity in United States is produced using steam turbine.
a) 88%
b) 50%
c) 100%
d) 77%
Answer: 88%
10. Superficial steam power plants operate at _____ temperatures.
a) high
b) low
c) constant
d) none of the mentioned
Answer: high
11. steam pressure Increases it becomes superficial fluid.
a) True
b) False
Answer: True
12. Boiler extracts heat from the working fluid.
a) True
b) False
Answer: True
13. Energy efficiency of superficial steam is high
a) True
b) False
Answer: True
14. In double acting steam engine pressure acts on the both sides of the valves.
a) True
b) False
Answer: True
15. Superficial steam turbines can be operated at low speeds
a) True
b) False
Answer: False
Fire Resisting Fluids in Steam Turbines Multiple Choice Questions
1. Fire resistance of fluids is _______ to the vaporization of the fluid.
a) inversely proportional
b) directly proportional
c) both are no where related
d) None of the mentioned
Answer: inversely proportional
2. ___________ resistance is taken into the consideration while selecting fire resistant fluid.
a) Corrosion
b) Frictional
c) Corrosion & Frictional
d) None of the mentioned
Answer: Corrosion
3. __________ esters can be used as fire resistant fluids.
a) Phosphate
b) Potassium
c) Sodium
d) None of the mentioned
Answer: Phosphate
4. Fire resistance is _________ proportional to smoothening of the steam.
a) inversly
b) directly
c) fire resistance is not related to steam smootheness
d) none of the mentioned
Answer: directly
5. Fire resistant fluids can be used in __________ pressures.
a) high
b) low
c) both high and low
d) none of the mentioned
Answer: both high and low
6. Heat resistant fluids are in _______ color.
a) Black
b) White
c) Colorless
d) None of the mentioned
Answer: White
7. Fire resistant fluids are selected based on operating ____________
a) temperature
b) pressure
c) temperature & pressure
d) none of the mentioned
Answer: temperature & pressure
8. _______ can also be used as fire resistant fluids.
a) Methylene
b) Ethylene
c) Water
d) Ester mineral blends
Answer: Ester mineral blends
9. _______ glycols can also be used as fire resistant fluids.
a) Methylene
b) Ethylene
c) Water
d) None of the mentioned
Answer: Water
10. __________ is the important feature of the fire resistant fluid.
a) Specific volume
b) Specific heat
c) Viscosity
d) None of the mentioned
Answer: Viscosity
11. Fire resistant fluids can be used in high pressures.
a) True
b) False
Answer: False
12. Ester mineral blends can also be used as fire resistant fluids.
a) True
b) False
Answer: True
13. Water glycols can also be used as fire resistant fluids.
a) True
b) False
Answer: True
Hydrogen Seal Rings in Turbine Generator Multiple Choice Questions
1. When hydrogen consumption is __________ its efficiency is decreased in turbo generators.
a) increased
b) decreased
c) constant
d) none of the mentioned
Answer: a
2. Hydrogen rings are used to control _______ consumption in gas turbine.
a) Fuel
b) Oxygen
c) Hydrogen
d) None of the mentioned
Answer: c
3. _________ oil flow can be controlled by using hydrogen rings.
a) Low
b) Excessive
c) Incomplete
d) None of the mentioned
Answer: b
4. Hydrogen rings parts
a) upper case
b) lower case
c) Both (a) and (b)
d) None of the mentioned
Answer: Both (a) and (b)
5. _________ is used as coolant in turbo generators.
a) Oxygen
b) Hydrogen
c) Fuel
d) None of the mentioned
Answer: Hydrogen
6. Hydrogen seal rings are used to prevent _______ losses.
a) Pressure
b) Temperature
c) Volume
d) None of the mentioned
Answer: Pressure
7. Hydrogen is combustible below _______% purity limit.
a) 74
b) 50
c) 100
d) 120
Answer: 74
8. For hydrogen to use as coolant its purity must be more than _______
a) 74%
b) 50%
c) 100%
d) 40%
Answer: 74%
9. Hydrogen rings are made at _____ degree segments.
a) 360
b) 90
c) 180
d) 60
Answer: 180
10. Hydrogen is used because of its ______ specific heat.
a) high
b) low
c) specific is not the factor considered while selecting
d) none of the mentioned
Answer: low
12. Hydrogen is used as coolant in turbo generators.
a) True
b) False
Answer: True
14. Hydrogen rings are of two parts upper case and lower case.
a) True
b) False
Answer: True
14. Hydrogen seal rings are used to prevent Pressure losses.
a) True
b) False
Answer: True
Steam Turbine Cylinders Multiple Choice Questions
1. All the cylinders used in steam turbine are worked under _______ pressure.
a) same
b) increasing pressure
c) decreasing pressure
d) none of the mentioned
Answer: increasing pressure
2. Steam entering cylinder has ______ temperature than the steam present in the cylinder.
a) less
b) more
c) equal
d) none of the mentioned
Answer: more
3. _________ stresses are developed on the wall of cylinder in steam turbine.
a) Compressive
b) Static
c) Thermal
d) None of the mentioned
Answer: Thermal
4. Thickness of the cylinder wall must be ________ in steam turbines.
a) constant
b) increased
c) decreasing
d) none of the mentioned
Answer: constant
5. ________ cylinder is used in steam turbine.
a) One
b) Multiple
c) Either one or multiple depending on the requirement
d) None of the mentioned
Answer: Either one or multiple depending on the requirement
6. Pressure acting on the turbine cylinders is _______
a) low
b) high
c) depending on the volume
d) none of the mentioned
Answer: high
7. Pressures of the cylinders in steam turbines are arranged according to the specific _______
a) temperature
b) pressure
c) volume
d) none of the mentioned
Answer: volume
8. ________ takes place due to thermal stresses in the steam turbine cylinder.
a) Expansion
b) Compression
c) Depends
d) None of the mentioned
Answer: Expansion
9. _______ can also be done to the steam in between the cylinders of steam turbine.
a) Reheating
b) Regenerating
c) Recuperating
d) None of the mentioned
Answer: Reheating
10. Some nozzles are equipped on the ________
a) Reheating
b) Rotating shaft
c) Casing
d) Cylinders
Answer: Cylinders
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