Question 1

The flow of steam is super-sonic ____________

Accepted Answer

A) in the convergent portion of the nozzle 
B) at the entrance to the nozzle 
C) at the throat of the nozzle 
D) in the divergent portion of the nozzle 
A) in the convergent portion of the nozzle 
B) at the entrance to the nozzle 
C) at the throat of the nozzle 
D) in the divergent portion of the nozzle D

Question 2

In an impulse turbine, steam expands ____________

Accepted Answer

A) wholly in nozzle 
B) partly in the nozzle and partly in blades 
C) wholly in blades 
D) none of the mentioned 
A) wholly in nozzle 
B) partly in the nozzle and partly in blades 
C) wholly in blades 
D) none of the mentioned A

Question 3

The critical pressure gives the velocity of steam at the throat ___________

Accepted Answer

A) equal to the velocity of sound 
B) more than velocity of sound 
C) less than the velocity of light 
D) none of the mentioned 
A) equal to the velocity of sound 
B) more than velocity of sound 
C) less than the velocity of light 
D) none of the mentioned A

Question 4

Steam turbines are used for ____________

Accepted Answer

A) electric power generation 
B) large marine propulsion 
C) direct drive of fans, compressors, pumps 
D) all of the mentioned 
A) electric power generation 
B) large marine propulsion 
C) direct drive of fans, compressors, pumps 
D) all of the mentioned

Question 5

The steam leaves the nozzle at a ____________

Accepted Answer

A) low pressure and a high velocity 
B) high pressure and a high velocity 
C) high pressure and a low velocity 
D) low pressure and a low velocity 
A) low pressure and a high velocity 
B) high pressure and a high velocity 
C) high pressure and a low velocity 
D) low pressure and a low velocity

Question 6

What is the action of steam in a steam turbine?

Accepted Answer

A) neither static nor dynamic 
B) dynamic 
C) static 
D) both dynamic & static 
A) neither static nor dynamic 
B) dynamic 
C) static 
D) both dynamic & static

Question 7

In reaction turbines, the axial thrust is due to ____________

Accepted Answer

A) pressure drop across the rotor 
B) change in axial velocity 
C) both pressure drop across the rotor and change in axial velocity 
D) none of the mentioned 
A) pressure drop across the rotor 
B) change in axial velocity 
C) both pressure drop across the rotor and change in axial velocity 
D) none of the mentioned

Question 8

De-Laval turbine is a ____________

Accepted Answer

A) multi rotor impulse turbine 
B) impulse reaction turbine 
C) single rotor impulse turbine 
D) none of the mentioned 
A) multi rotor impulse turbine 
B) impulse reaction turbine 
C) single rotor impulse turbine 
D) none of the mentioned

Question 9

What is the purpose of governing in steam turbines?

Accepted Answer

A) reheat the steam and improve its quality 
B) maintain the speed of the turbine 
C) reduce the effective heat drop 
D) completely balance against end thrust 
A) reheat the steam and improve its quality 
B) maintain the speed of the turbine 
C) reduce the effective heat drop 
D) completely balance against end thrust

Question 10

A binary vapour plant consists of ____________

Accepted Answer

A) mercury boiler 
B) steam turbine 
C) steam condenser 
D) all of the mentioned 
A) mercury boiler 
B) steam turbine 
C) steam condenser 
D) all of the mentioned

Question 11

What is the critical pressure ratio for initially dry saturated steam?

Accepted Answer

A) 0.546 
B) 0.577 
C) 0.586 
D) 0.578 
A) 0.546 
B) 0.577 
C) 0.586 
D) 0.578

Question 12

The variation of steam pressure in the nozzle depends upon ____________

Accepted Answer

A) dryness fraction of steam 
B) specific volume of steam 
C) velocity of steam 
D) all of the mentioned 
A) dryness fraction of steam 
B) specific volume of steam 
C) velocity of steam 
D) all of the mentioned

Question 13

The ratio of the isentropic heat drop to the heat supplied is called ____________

Accepted Answer

A) stage efficiency 
B) reheat factor 
C) internal efficiency 
D) rankine efficiency 
A) stage efficiency 
B) reheat factor 
C) internal efficiency 
D) rankine efficiency

Question 14

The steam enters the nozzle at a ____________

Accepted Answer

A) low pressure and a low velocity 
B) high pressure and a low velocity 
C) low pressure and a high velocity 
D) high pressure and a high velocity 
A) low pressure and a low velocity 
B) high pressure and a low velocity 
C) low pressure and a high velocity 
D) high pressure and a high velocity

Question 15

Rateau turbine is ____________

Accepted Answer

A) pressure-velocity compounded turbine 
B) simple reaction turbine 
C) velocity compounded turbine 
D) pressure compounded turbine 
A) pressure-velocity compounded turbine 
B) simple reaction turbine 
C) velocity compounded turbine 
D) pressure compounded turbine

Question 16

The ratio of total useful heat drop to the total isentropic heat drop is called?

Accepted Answer

A) rankine efficiency 
B) stage efficiency 
C) internal efficiency 
D) none of the mentioned 
A) rankine efficiency 
B) stage efficiency 
C) internal efficiency 
D) none of the mentioned

Question 17

The ratio of the useful heat drop to the isentropic heat drop is called ____________

Accepted Answer

A) condenser efficiency 
B) nozzle efficiency 
C) vacuum efficiency 
D) boiler efficiency 
A) condenser efficiency 
B) nozzle efficiency 
C) vacuum efficiency 
D) boiler efficiency

Question 18

Curtis turbine is a ____________

Accepted Answer

A) pressure compounded turbine 
B) velocity compounded turbine 
C) simple reaction turbine 
D) pressure-velocity compounded turbine 
A) pressure compounded turbine 
B) velocity compounded turbine 
C) simple reaction turbine 
D) pressure-velocity compounded turbine

Question 19

The Parsons' reaction turbine has ____________

Accepted Answer

A) only moving blades 
B) only fixed blades 
C) fixed and moving blades of different shape 
D) identical fixed and moving blades 
A) only moving blades 
B) only fixed blades 
C) fixed and moving blades of different shape 
D) identical fixed and moving blades

Question 20

The reheat factor depends upon ____________

Accepted Answer

A) exit pressure 
B) turbine stage efficiency 
C) initial pressure and superheat 
D) all of the mentioned 
A) exit pressure 
B) turbine stage efficiency 
C) initial pressure and superheat 
D) all of the mentioned

The flow of steam is super-sonic ____________

In an impulse turbine, steam expands ____________

The critical pressure gives the velocity of steam at the throat ___________

Steam turbines are used for ____________

The steam leaves the nozzle at a ____________

What is the action of steam in a steam turbine?

In reaction turbines, the axial thrust is due to ____________

De-Laval turbine is a ____________

What is the purpose of governing in steam turbines?

A binary vapour plant consists of ____________

What is the critical pressure ratio for initially dry saturated steam?

The variation of steam pressure in the nozzle depends upon ____________

The ratio of the isentropic heat drop to the heat supplied is called ____________

The steam enters the nozzle at a ____________

Rateau turbine is ____________

The ratio of total useful heat drop to the total isentropic heat drop is called?

The ratio of the useful heat drop to the isentropic heat drop is called ____________

Curtis turbine is a ____________

The Parsons' reaction turbine has ____________

The reheat factor depends upon ____________

Nozzles, Fountains, and Compressible Flow

Friction, Mach Number, and Boiler Operations

Boiler and Fuel

Turbines, Heat Exchangers, and Refrigeration Cycles

Refrigeration and Air Conditioning System Components and Processes

Cooling Systems and Nozzles in Engineering

Understanding Fluid Mechanics and Turbines

Boiler Types and Operations

Boiler Technology and Operation: Salts, Features, Difficulties, and Draught Systems

Steam Boilers and Turbines: Types, Characteristics, and Applications

Steam Turbines and Power Cycles

Energy Recovery and Thermodynamics Processes

Condensers and Heat Transfer in Refrigeration and Air Conditioning Systems

Boiler Systems and Fluid Dynamics

Turbines, Cogeneration, Refrigeration, and Air Conditioning Systems

Filters

Exam 11: Understanding Steam Turbines: Ratios, Actions, and Factors

The flow of steam is super-sonic ____________

In an impulse turbine, steam expands ____________

The critical pressure gives the velocity of steam at the throat ___________

Steam turbines are used for ____________

The steam leaves the nozzle at a ____________

What is the action of steam in a steam turbine?

In reaction turbines, the axial thrust is due to ____________

De-Laval turbine is a ____________

What is the purpose of governing in steam turbines?

A binary vapour plant consists of ____________

What is the critical pressure ratio for initially dry saturated steam?

The variation of steam pressure in the nozzle depends upon ____________

The ratio of the isentropic heat drop to the heat supplied is called ____________

The steam enters the nozzle at a ____________

Rateau turbine is ____________

The ratio of total useful heat drop to the total isentropic heat drop is called?

The ratio of the useful heat drop to the isentropic heat drop is called ____________

Curtis turbine is a ____________

The Parsons' reaction turbine has ____________

The reheat factor depends upon ____________

Nozzles, Fountains, and Compressible Flow

Friction, Mach Number, and Boiler Operations

Boiler and Fuel

Turbines, Heat Exchangers, and Refrigeration Cycles

Refrigeration and Air Conditioning System Components and Processes

Cooling Systems and Nozzles in Engineering

Understanding Fluid Mechanics and Turbines

Boiler Types and Operations

Boiler Technology and Operation: Salts, Features, Difficulties, and Draught Systems

Steam Boilers and Turbines: Types, Characteristics, and Applications

Steam Turbines and Power Cycles

Energy Recovery and Thermodynamics Processes

Condensers and Heat Transfer in Refrigeration and Air Conditioning Systems

Boiler Systems and Fluid Dynamics

Turbines, Cogeneration, Refrigeration, and Air Conditioning Systems

Filters