Fire tube boilers are those in which

For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

A

More

B

Less

C

Equal

D

None of these

For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has

A

More heating surface

B

Less heating surface

C

Equal heating surface

D

Heating surface depends on other parameters

In fire tube boilers

A

Water passes through the tubes which are surrounded by flames and hot gases

B

The flames and hot gases pass through the tubes which are surrounded by water

C

Forced circulation takes place

D

None of these

Fire tube boilers are

A

Internally fired

B

Externally fired

C

Internally as well as externally fired

D

None of these

Fire tube boilers are limited to a maximum working pressure of

A

0.17 MN/m²

B

1.7 MN/m²

C

17 MN/m²

D

170 MN/m²

Fire tube boilers are limited to a maximum design working pressure of

A

1 kg/cm

B

6 kg/cm

C

17 kg/cm²

D

100 kg/cm²

Very high pressure boilers are usually __________ boilers.

A

Fire tube

B

Water tube

C

Waste heat

D

Natural circulation

Water 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

Work is done during adiabatic expansion

D

Change in enthalpy

A fire broke out in a garments factory. How many minutes would it take for a fire truck to got to the fire 10 miles away if it travels at a rate of 20 mph?

A

10/20

B

20/10

C

60 * (10/20)

D

60 * (20 /10)

Steam in water tube boiler as compared to fire tube boiler

A

Can be raised rapidly

B

Is raised at slower rate

C

Is raised at same rate

D

Could be raised at fast/slow rate depending on design

Fire tube boilers are those in which

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