Deck 8: Boiler Types and Operations

Question 1

Which type of boiler is it when the furnace is placed in the region of boiling water?

A)internally fired boiler
B)externally fired boiler
C)babcock-wilcox boiler
D)stirling boiler

Answer 1

internally fired boiler

Question 2

What type of boiler is a Lamont boiler?

A)forced circulation
B)natural circulation
C)over-through
D)positive forced circulation

Answer 2

forced circulation

Question 3

What is called as the heart of the Lamont boiler?

A)water drum
B)centrifugal pump
C)furnace
D)blower

Answer 3

centrifugal pump

Question 4

In what form are the boiler's tube arrange in Lamont boiler?

A)parallel in vertical
B)inclined vertically
C)parallel in horizontal
D)horizontally inclined

Question 5

Through which does the even circulation of feed water is possible in Lamont boiler?

A)nozzles
B)water trough
C)feed pump
D)hose

Question 6

What is the pressure range between which Lamont boilers operates?

A)80-120bar
B)120-160bar
C)180-360bar
D)450-560bar

Question 7

What type of steam is generated by evaporator tube of Lamont boiler?

A)saturated steam
B)unsaturated steam
C)superheated steam
D)flash steam

Question 8

What is the main disadvantage of Lamont boiler?

A)less flexible in design
B)low heat transfer rate
C)formation of bubbles
D)low steam generation capacity

Question 9

What type of boiler is a Benson boiler?

A)super critical boiler
B)fire tube boiler
C)natural circulation boiler
D)over-through boiler

Question 10

What is the capacity of Benson boiler?

A)180 tonnes/hr & above
B)150 tonnes/hr & above
C)250 tonnes/hr & above
D)300 tonnes/hr & above

Question 11

What is the major disadvantage of the Benson boilers?

A)boiler is big in size
B)has large storage capacity
C)deposition of salts
D)bubble formation

Question 12

Why starting valve is closed and valve 2 is opened while taking boiler on range in Benson boiler?

A)avoid excessive heating of tube
B)to maintain the constant flow of water
C)to avoid pressure built up in tubes
D)to avoid pipe leakages at joints

Question 13

What is the function of boiler?

A)to burn the fuel in a confined closed system with the supply of air
B)to generate steam at varying pressure
C)to generate steam at constant pressure
D)to produce flue gases by burning fuel at a given pressure

Question 14

Why single boiler unit per turbine is equipped commonly?

A)for better turbine control
B)to deduce the costs
C)for overcoming losses of power
D)to improve the efficiency

Question 15

How can be the plant efficiency of steam power plant is increased?

A)by using high pressure and high temperature steam
B)by equipping ash and flue gas clearance system
C)by maintaining the boiler on daily basis by cleaning the soot and combustion products
D)by using better and efficient type of fuel for combustion

Question 16

What is the temperature at which the steam boilers are capable to withstand?

A)200°c
B)280°c
C)540°c
D)358°c

Question 17

What is needed to be increased to increase the heat transfer rate in the boiler?

A)gas velocities
B)fuel input
C)water velocities
D)air supply

Question 18

In what is water in high pressure boiler circulated through?

A)conduits
B)cove
C)channel
D)tubes

Question 19

Where is water steam separator drum located in Lamont boiler?

A)inside of the boiler
B)right above the furnace
C)before the feed water pump
D)outside of boiler

Question 20

Which of the given boilers velocity of flue gases is greater than velocity of sound?

A)benson boiler
B)la-mont boiler
C)schmidt-hartmann boiler
D)velox boiler

Question 21

Which boiler is most successful boiler in the gas turbine industries?

A)because it has greater flexibility
B)it is easy to control, it's fully automatic
C)it has higher thermal efficiency of all
D)can increase heat transfer without changing its size

Question 22

What type of boiler is a Velox boiler?

A)forced circulation boiler
B)natural circulation boiler
C)positively forced circulation boiler
D)once- through boiler

Question 23

What is used to heat the feed water which is used for recirculation through tubes?

A)condenser
B)pre-heater
C)economizer
D)water clarifier

Question 24

How many circuits are there in the Schmidt-Hartmann boiler?

A)3
B)2
C)4
D)6

Question 25

Which type of circulation is incurred in Schmidt-Hartmann boiler?

A)natural circulation
B)positive forced circulation
C)forced circulation
D)once-through circulation