Question 11 : When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
1. overdamping
2. underdamping
3. chocked
4. none of the mentioned
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Question 12 : The critical pressure gives the velocity of steam at the throat
1. equal to the velocity of sound
2. more than velocity of sound
3. less than the velocity of light
4. none of the mentioned
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Question 13 : The Guide vanes remain stationary in?
1. Curtis staging
2. Rateau staging
3. Both of the mentioned
4. None of the mentioned
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Question 14 : The Parsons' reaction turbine has
1. only moving blades
2. only fixed blades
3. fixed and moving blades of different shape
4. identical fixed and moving blades
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Question 15 : Parson's reaction turbine is a __________ reaction turbine.
1. 40%
2. 50%
3. 60%
4. 70%
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Question 16 : A duct which decreases the velocity of fluid & causes a corresponding increase in pressure is called?
1. nozzle
2. diffuser
3. jet
4. orifice
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Question 17 : External loses occur ___________ turbine casing.
1. inside
2. outside
3. both
4. none of the above
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Question 18 : The ratio of total useful heat drop to the total isentropic heat drop, is called
1. Rankine efficiency
2. Stage efficiency
3. Internal efficiency
4. None of the mentioned
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Question 19 : The incoming steam inside the turbine goes into?
1. Steam vanes
2. Steam chest
3. Nozzle vanes
4. Moving blades
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Question 20 : In a nozzle, whole frictional loss is assumed to occur between
1. inlet and throat
2. throat and exit
3. inlet and outlet
4. none of the mentioned
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