The natural draught is produced by

Question

The natural draught is produced by

A. Steam jet

B. Centrifugal fan

C. Chimney

D. Both (A) and (B)

Share this question with your friends

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Comment

In water wall furnace, the heat is transferred to the water walls by

A. Convection

B. Radiation

C. Conduction

D. Radiation and conduction

Discuss this answer

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

A. Remains constant

B. Decreases

C. Increases

D. None of these

Discuss this answer

The safety valve on boiler drum compared to safety valve on superheater is set at

A. Same value

B. Higher value

C. Lower value

D. Lower/higher depending on steam flow

Discuss this answer

The best suited coal for chain or travelling grate stoker boiler is

A. Coking coal

B. Non-coking or free burning coal

C. Pulverised coal

D. High sulphur coal

Discuss this answer

The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.

A. More

B. Less

C. Equal

D. None of these

Discuss this answer

The efficiency of the plant __________ with the mechanical draught.

A. Increases

B. Decreases

C. Remains constant

D. None of these

Discuss this answer

Which of the following boiler is best suited to meet the fluctuating demand of steam?

A. Locomotive boiler

B. Lancashire boiler

C. Cornish boiler

D. Babcock and Wilcox boiler

Discuss this answer

A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

A. Steam condenser

B. Steam boiler

C. Steam preheater

D. Economiser

Discuss this answer

The high steam and low water safety valve is not used in

A. Cochran boiler

B. Cornish boiler

C. Lancashire boiler

D. Locomotive boiler

Discuss this answer

Benson boiler requires

A. No drum

B. One drum

C. Two drums

D. Three drums

Discuss this answer

Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)

A. p_a = p_m/K

B. p_a = p_m × K

C. p_a = K/p_m

D. p_a = p_m + K

Discuss this answer

The diameter of a cylindrical shell of a Scotch marine boiler varies from

A. 1.5 to 2 m

B. 2.5 to 3.5 m

C. 3.5 to 4.5 m

D. None of these

Discuss this answer

Which of the following is steam dial?

A. Non-coking bituminous coal

B. Brown coal

C. Pulverised coal

D. Coking bituminous coal

Discuss this answer

The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

A. Wet

B. Superheated

C. Remain dry saturated

D. Dry

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

The function of a valve rod is

A. To provide reciprocating motion to the slide valve

B. To convert reciprocating motion of the piston into rotary motion of the crank

C. To convert rotary motion of the crankshaft into to and fro motion of the valve rod

D. To provide simple harmonic motion to the D-slide valve

Discuss this answer

The maximum efficiency of a reaction turbine is

A. 2 sin²α/(1 + sin²α)

B. 2 cos²α/(1 + cos²α)

C. (1 + sin²α)/2 sin²α

D. (1 + cos²α)/2 cos²α

Discuss this answer

Fire tube boilers are those in which

A. Flue gases pass through tubes and water around it

B. Water passes through the tubes and flue gases around it

C. Forced circulation takes place

D. Tubes are laid vertically

Discuss this answer

A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

A. 150 kg/h

B. 210 kg/h

C. 280 kg/h

D. 340 kg/h

Discuss this answer

Cut-off ratio is the ratio of

A. Swept volume to the volume at cut-off

B. Volume at cut-off to the clearance volume

C. Volume at cut-off to the swept volume

D. Clearance volume to the volume at cut-off

Discuss this answer

The natural draught is produced by

A. Steam jet

B. Centrifugal fan

C. Chimney

D. Both (A) and (B)

Discuss this answer

The nozzle efficiency is the ratio of

A. Workdone on the blades to the energy supplied to the blades

B. Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

C. Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam

D. None of the above

Discuss this answer

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 these

Discuss this answer

The mechanical draught _________ with the amount of smoke.

A. Increases

B. Decreases

C. Does not effect

D. None of these

Discuss this answer

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

A. Slow speed engine

B. Vertical steam engine

C. Condensing steam engine

D. Non-condensing steam engine

Discuss this answer

Which of the following statement is wrong?

A. Locomotive boiler is a water tube boiler

B. Water tube boilers are internally fired

C. Lamont boiler is a low pressure water tube boiler

D. All of the above

Discuss this answer

The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

A. Feed pump

B. Injector

C. Feed check valve

D. Pressure gauge

Discuss this answer

Locomotive type' boiler is

A. Horizontal multi-tubular water tube boiler

B. Water wall enclosed furnace type

C. Vertical tubular fire tube type

D. Horizontal multi-tubular fire tube type

Discuss this answer

The flow through a nozzle is regarded as

A. Constant volume flow

B. Constant pressure flow

C. Isothermal flow

D. Isentropic flow

Discuss this answer

The basic job of feed water treatment in boilers is to overcome the problem of

A. Corrosion

B. Scale

C. Carryover

D. All of the above

Discuss this answer

Accepted Answer

C. Chimney

The natural draught is produced by

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

In water wall furnace, the heat is transferred to the water walls by

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

The safety valve on boiler drum compared to safety valve on superheater is set at

The best suited coal for chain or travelling grate stoker boiler is

The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.

The efficiency of the plant __________ with the mechanical draught.

Which of the following boiler is best suited to meet the fluctuating demand of steam?

A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

The high steam and low water safety valve is not used in

Benson boiler requires

Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)

The diameter of a cylindrical shell of a Scotch marine boiler varies from

Which of the following is steam dial?

The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

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

The function of a valve rod is

The maximum efficiency of a reaction turbine is

Fire tube boilers are those in which

A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

Cut-off ratio is the ratio of

The natural draught is produced by

The nozzle efficiency is the ratio of

Reheating of steam in a turbine

The mechanical draught _________ with the amount of smoke.

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

Which of the following statement is wrong?

The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Locomotive type' boiler is

The flow through a nozzle is regarded as

The basic job of feed water treatment in boilers is to overcome the problem of

Also checkout

The natural draught is produced by

Correct Answer :

Show all Steam Boilers, Engines, Nozzles & Turbines MCQ

Related Questions

In water wall furnace, the heat is transferred to the water walls by

The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

The safety valve on boiler drum compared to safety valve on superheater is set at

The best suited coal for chain or travelling grate stoker boiler is

The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.

The efficiency of the plant __________ with the mechanical draught.

Which of the following boiler is best suited to meet the fluctuating demand of steam?

A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

The high steam and low water safety valve is not used in

Benson boiler requires

Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

The diameter of a cylindrical shell of a Scotch marine boiler varies from

Which of the following is steam dial?

The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

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

The function of a valve rod is

The maximum efficiency of a reaction turbine is

Fire tube boilers are those in which

A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

Cut-off ratio is the ratio of

The natural draught is produced by

The nozzle efficiency is the ratio of

Reheating of steam in a turbine

The mechanical draught _________ with the amount of smoke.

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

Which of the following statement is wrong?

The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Locomotive type' boiler is

The flow through a nozzle is regarded as

The basic job of feed water treatment in boilers is to overcome the problem of

Also checkout

Which of the following is correct? (Where p_a = Actual mean effective pressure, p_m = Theoretical mean effective pressure, and K = Diagram factor)