Boiler

Question 1

Water rube boiler means and example

Answer 1

Water is flowing in tube and hot gases is surrounded
Babcock, stirling, La mont, loafler, Velox, Benson

Question 2

Fire tube boiler
Example

Answer 2

Hot gas is inside tube and water is surrounded
Lancashire, Locomotive, Cochran, Carnish

Question 3

According to type of combustion

Answer 3

Externally fired
Internally fired

Question 4

Externally fired example

Answer 4

Water tube boiler

Question 5

Internally fired example

Answer 5

Fire tube boiler

Question 6

Natural circulation

Answer 6

Water flows due to density difference of hot and cold fluid

Question 7

Natural circular example

Answer 7

Babcock wilcox
Stirling
All fire tube boiler

Question 8

According to application of boiler

Answer 8

Stationary boiler
Mobile
Locomotive
Marine

Question 9

Low pressure boiler

Answer 9

15-20 bar

Question 10

Medium pressure boiler

Answer 10

20-80 bar

Question 11

High pressure boiler

Answer 11

Above 80 bar

Question 12

Supercritical boiler

Answer 12

Above critical pressure
Benson boiler
255 bar

Question 13

Babcok boilers ___ tubes and tubes are ____

Answer 13

Inclined and zig zag

Question 14

Babcock wilcox boiler
Pressure
Evaporating capacity

Answer 14

Low- 11.5 to 17.5 bar
20-40k kg/hr

Question 15

Stirling boiler
Pressure
Circulation

Answer 15

60 bar
Natural

Question 16

Stirling boiler uses ____

Answer 16

Mud drum
More than one boiler drum

Question 17

Tubes in Stirling boiler are ____

Answer 17

Bent

Question 18

La mont boiler
Pressure
Evaporation capacity
Circulation

Answer 18

130 bar
50 tonnes/hr
Forced

Question 19

Components of boiler from bottom

Answer 19

Combustion chamber
Evaporator
Superheater
Economizer
Preheater

Question 20

Preheater

Answer 20

To preheat air for combustion

Question 21

Economizer

Answer 21

To preheat feed water

Question 22

Superheater

Answer 22

To reheat outlet steam

Question 23

Shri Loeffler boiler
Pr
Evaporation capacity
Circulation

Answer 23

140 bar
100 tonnes/hr
Forced

Question 24

Velox boiler uses ____ furnace

Answer 24

Supercharged furnace

Gas turbine ~ compressor

Question 25

Eva capacity of benson boiler

Answer 25

135 tonnes/hr

Question 26

Specialty of benson boiler

Answer 26

No boiling Instant steam is available No drum is required Since pressure is more than critical pressure (225-250 bar)

Question 27

Lancashire boiler Pressure Evaporating capacity Dia

Answer 27

15 bar 9000 kg/hr 2-3 m

Question 28

How Cornish boiler is different from Lancashire

Answer 28

Cornish is small in size It has only one flue gas tube

Question 29

Cornish Pressure Evaporating capacity Dia

Answer 29

10-12 bar 6500 kg/hr 1.25 to 1.75 m

Question 30

Locomotive boiler Pressure Evaporating capacity

Answer 30

Mobile boiler 20-25 bar 20 - 50 tonne/hr

Question 31

Cochran boiler Pr E.C

Answer 31

11-12 bar 3600 kg/hr

Question 32

Vertical boiler

Answer 32

Cochran

Question 33

Cochran boiler is ____ circulation

Answer 33

Natural

Question 34

Boiler accessories

Answer 34

Which is not the part of working but it always installed to improve the efficiency

Question 35

Feed water pump is used to

Answer 35

Increase the rate of circulation of water

Question 36

Steam injector

Answer 36

A device used to force feed water into a boiler using the energy of steam

Question 37

Anti priming pipe

Answer 37

To remove moisture from steam

Question 38

Boiler mounting

Answer 38

Essential devices mounted on boiler to operate in a control way with complete safety

Question 39

Safety valve

Answer 39

Do not allow boiler pressure to rise beyond its safe pressure

Question 40

Water level indicator

Answer 40

It shows working level of water in a drum

Question 41

Fusible plug

Answer 41

In case if water level in a drum goes down it may overheat so to avoid this, a plug is fit above the combustion chamber

Question 42

Pressure gauge

Answer 42

Indicate operating pressure

Question 43

Steam stop valve

Answer 43

Regulates the amount of steam required

Question 44

Feed check valve

Answer 44

Check the amount of feed water going to the boiler

Question 45

Blow off cock

Answer 45

Allow to drain off water from boiler

Question 46

Man hole

Answer 46

To enter man for maintenance and cleaning

Question 47

Mud box

Answer 47

To get out the sediment collected from water

Question 48

According to IBR regulations boilers exceeding ____ need regular inspection and certification

Answer 48

Capacity of more than 5 gallons