In an ideal impulse turbine, the

Question

In an ideal impulse turbine, the

A. Absolute velocity at the inlet of moving blade is equal to that at the outlet

B. Relative velocity at the inlet of the moving blade is equal to that at the outlet

C. Axial velocity at inlet is equal to that at the outlet

D. Whirl velocity at inlet is equal to that at the outlet

Share this question with your friends

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Comment

A safety valve mainly used with locomotive and marine boilers is

A. Lever safety valve

B. Dead weight safety valve

C. High steam and low water safety valve

D. Spring loaded safety valve

Discuss this answer

The function of a safety valve is

A. To blow off steam when the pressure of steam inside the boiler exceeds the working pressure

B. To indicate the water level inside the boiler to an observer

C. To measure pressure of steam inside the steam boiler

D. None of the above

Discuss this answer

The object of producing draught in a boiler is

A. To provide an adequate supply of air for the fuel combustion

B. To exhaust the gases of combustion from the combustion chamber

C. To discharge the gases of combustion to the atmosphere through the chimney

D. All of the above

Discuss this answer

In a throttling process

A. Steam temperature remains constant

B. Steam pressure remains constant

C. Steam enthalpy remains constant

D. Steam entropy remains constant

Discuss this answer

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)

A. T₁ /88.25H

B. 88.25H/T₁

C. T₁ /176.5H

D. 176.5H/T₁

Discuss this answer

On Millier chart, the constant pressure lines

A. Diverge from left to right

B. Diverge from right to left

C. Are equally spaced throughout

D. First rise up and then fall

Discuss this answer

In locomotive boiler, maximum steam pressure is limited to

A. 1 kg/cm²

B. 5 kg/cm²

C. 10 kg/cm²

D. 18 kg/cm²

Discuss this answer

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

A. And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

B. And its corresponding conversion into dry steam at desired boiler pressure

C. Conversion into steam at atmospheric condition

D. Conversion into steam at the same pressure at which feed water is supplied

Discuss this answer

Which of the following statement is wrong?

A. The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.

B. The flow in the convergent portion of the nozzle is subsonic.

C. The flow in the divergent portion of the nozzle is supersonic.

D. To increase the velocity of steam above sonic velocity (supersonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.

Discuss this answer

In an ideal impulse turbine, the

A. Absolute velocity at the inlet of moving blade is equal to that at the outlet

B. Relative velocity at the inlet of the moving blade is equal to that at the outlet

C. Axial velocity at inlet is equal to that at the outlet

D. Whirl velocity at inlet is equal to that at the outlet

Discuss this answer

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

A. Throttling calorimeter

B. Separating calorimeter

C. Combined separating and throttling calorimeter

D. Bucket calorimeter

Discuss this answer

An impulse turbine as compared to a reaction turbine, for a given power has _________ row of blades.

A. Equal

B. Less

C. More

D. None of these

Discuss this answer

The evaporation of 15.653 kg of water per hour from and at 100°C is called

A. Evaporative capacity

B. Factor of evaporation

C. Equivalent evaporation

D. One boiler h.p.

Discuss this answer

The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.

A. One-fourth

B. One-third

C. Two-fifth

D. One-half

Discuss this answer

Boiler parameters are expressed by

A. Tonnes/hr. of steam

B. Pressure of steam in kg/cm²

C. Temperature of steam in °C

D. All of the above

Discuss this answer

An economiser is installed in a boiler primarily to

A. Superheat the steam

B. Reduce fuel consumption

C. Increase steam pressure

D. All of these

Discuss this answer

Which of the following is a water tube boiler?

A. Locomotive boiler

B. Cochran boiler

C. Cornish boiler

D. Babcock and Wilcox boiler

Discuss this answer

The ultimate analysis of fuel lists

A. Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume

B. Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight

C. Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash

D. Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

Discuss this answer

Water boils when its vapour pressure

A. Equals that of the surroundings

B. Equals 760 mm of mercury

C. Equals to atmospheric pressure

D. Equals the pressure of water in the container

Discuss this answer

When the inlet pressure of steam is equal to the exit pressure, then

A. There is a pressure drop in the nozzle

B. Fluid flows through the nozzle

C. Pressure drops and fluid flows through the nozzle

D. There is no pressure drop and fluid does not flow through the nozzle

Discuss this answer

The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

A. More

B. Less

C. Same

D. None of these

Discuss this answer

By compounding the expansion of steam in two or more cylinders, the length of stroke

A. Does not change

B. Increases

C. Decreases

D. None of these

Discuss this answer

In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

A. 3.3 bar

B. 5.46 bar

C. 8.2 bar

D. 9.9 bar

Discuss this answer

Heating wet steam at constant temperature is heating it at constant

A. Volume

B. Pressure

C. Entropy

D. Enthalpy

Discuss this answer

The maximum steam pressure in a Locomotive boiler is limited to

A. 0.18 MN/m²

B. 1.8 MN/m²

C. 18 MN/m²

D. 180 MN/m²

Discuss this answer

A supercritical boiler is one that operates above the pressure and temperature of following values

A. 100 kg/cm² and 540°C

B. 1 kg/cm² and 100°C

C. 218 kg/cm² abs and 373°C

D. 218 kg/cm² abs and 540°C

Discuss this answer

Parson's turbine is a

A. Simple impulse turbine

B. Simple reaction turbine

C. Impulse-reaction turbine

D. None of these

Discuss this answer

Presence of moisture in fuel oil would

A. Keep the burner tips cool

B. Aid in proper combustion

C. Because sputtering, possibly extinguishing flame

D. Clean the nozzles

Discuss this answer

A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

A. Receiver type compound engine

B. Tandem type compound engine

C. Woolf type compound engine

D. Both (A) and (B)

Discuss this answer

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

A. Increases

B. Decreases

C. Remain same

D. None of these

Discuss this answer

Accepted Answer

B. Relative velocity at the inlet of the moving blade is equal to that at the outlet

In an ideal impulse turbine, the

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

A safety valve mainly used with locomotive and marine boilers is

The function of a safety valve is

The object of producing draught in a boiler is

In a throttling process

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)

On Millier chart, the constant pressure lines

In locomotive boiler, maximum steam pressure is limited to

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Which of the following statement is wrong?

In an ideal impulse turbine, the

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

An impulse turbine as compared to a reaction turbine, for a given power has _________ row of blades.

The evaporation of 15.653 kg of water per hour from and at 100°C is called

The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.

Boiler parameters are expressed by

An economiser is installed in a boiler primarily to

Which of the following is a water tube boiler?

The ultimate analysis of fuel lists

Water boils when its vapour pressure

When the inlet pressure of steam is equal to the exit pressure, then

The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

By compounding the expansion of steam in two or more cylinders, the length of stroke

In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

Heating wet steam at constant temperature is heating it at constant

The maximum steam pressure in a Locomotive boiler is limited to

A supercritical boiler is one that operates above the pressure and temperature of following values

Parson's turbine is a

Presence of moisture in fuel oil would

A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

Also checkout

In an ideal impulse turbine, the

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

A safety valve mainly used with locomotive and marine boilers is

The function of a safety valve is

The object of producing draught in a boiler is

In a throttling process

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T1 = Absolute temperature of air outside the chimney in K)

On Millier chart, the constant pressure lines

In locomotive boiler, maximum steam pressure is limited to

Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Which of the following statement is wrong?

In an ideal impulse turbine, the

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

An impulse turbine as compared to a reaction turbine, for a given power has _________ row of blades.

The evaporation of 15.653 kg of water per hour from and at 100°C is called

The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.

Boiler parameters are expressed by

An economiser is installed in a boiler primarily to

Which of the following is a water tube boiler?

The ultimate analysis of fuel lists

Water boils when its vapour pressure

When the inlet pressure of steam is equal to the exit pressure, then

The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

By compounding the expansion of steam in two or more cylinders, the length of stroke

In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p₂) will be

Heating wet steam at constant temperature is heating it at constant

The maximum steam pressure in a Locomotive boiler is limited to

A supercritical boiler is one that operates above the pressure and temperature of following values

Parson's turbine is a

Presence of moisture in fuel oil would

A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

Also checkout

The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in metres, and T₁ = Absolute temperature of air outside the chimney in K)