Deck 3: Boiler and Fuel

Question 1

What is the function of safety valves in the boiler?

A)to prevent excessive steam pressure
B)to prevent excessive air pressure
C)to prevent water pressure
D)to prevent from rising temperatures

Answer 1

to prevent excessive steam pressure

Question 2

How many types of safety valves are used in boiler in practice?

A)1
B)2
C)3
D)4

Answer 2

2

Question 3

What happens due to high temperature of feeds water in the economizer?

A)fuel consumption increases
B)fuel mechanical efficiency increases
C)fuel consumption decreases
D)fuel mechanical efficiency decreases

Answer 3

fuel consumption decreases

Question 4

What is the function of superheater in the boiler?

A)increase the temperature of steam
B)reheat the steam
C)superheat the feed water
D)to heat the fuel gas

Question 5

What is the function Air heater in the boiler?

A)preheat the air before entering the boiler
B)recover the heat from flue gas
C)heating of economizer tubes
D)reheat the gas coming out of economizer

Question 6

What is the function of the feed water pump of a boiler?

A)pump water at high pressure
B)to pump water at lower pressure
C)to pull back the water from boiler
D)to convert steam into water after the boiler process

Question 7

Rotary pumps are driven by______________

A)electric motors
B)batteries
C)diesel engines
D)biogas fuel

Question 8

Which fuel is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber?

A)charcoal
B)anthracite
C)coke
D)briquette coal

Question 9

Which fuel is produced by powdering low grade coal with high ash content?

A)coke
B)pulverized coal
C)charcoal
D)briquette coal

Question 10

Which is the correct advantage of solid fuels out of the given option?

A)they have low ignition temperature
B)they produce small amount of smoke
C)they have higher calorific value
D)they do not form any clinker

Question 11

Choose the proper disadvantage of solid fuels out of the given option?

A)they produce lot of smoke
B)they have low ignition temperature
C)they are high in production cost
D)they cannot be easily transported

Question 12

In what forms are liquid fuels available in nature?

A)light distillate
B)petroleum spirit
C)petroleum naphtha
D)crude petroleum

Question 13

Name the process used to eliminate impurities present in crude oil?

A)distillation
B)filtration
C)sedimentation
D)coagulation

Question 14

Which fuel is heavier than petrol but less volatile and it is commonly used as domestic fuel?

A)diesel
B)distilled fuel
C)kerosene
D)alcohol

Question 15

Which fuel is slightly heavier than kerosene and is produced in petroleum fractions?

A)diesel
B)crude oil
C)gasoline
D)distillate

Question 16

Which fuel has higher thermodynamic efficiency in liquid fuels?

A)diesel
B)petrol
C)kerosene
D)lpg

Question 17

Which liquid fuel has a wider composition than diesel and used in furnaces of oil fired boiler?

A)fuel oil
B)petrol
C)distillate
D)alcohol

Question 18

Which is the artificial liquid fuel obtained by fermentation process?

A)fuel oil
B)alcohol
C)distillate
D)kerosene

Question 19

Which among the following fuels need excess amount of air for complete combustion?

A)natural fuels
B)liquid fuels
C)gaseous fuels
D)artificial solid fuels

Question 20

Which of the following is not a type of steam turbine?

A)impulse turbine
B)reaction turbine
C)pelton wheel turbine
D)axial flow type turbine

Question 21

Majority of the turbines are axial flow type.

Question 22

Which turbines are employed for driving alternator at synchronous speed?

A)central station turbine
B)reheating turbine
C)extraction turbine
D)extraction induction turbine

Question 23

Non Condensing steam turbine can also be called as______________

A)extraction steam turbine
B)back pressure steam turbine
C)impulse steam turbine
D)none of the mentioned

Question 24

Steam turbine is classified on basis of

A)type of blades
B)exhausting condition
C)type of steam flow
D)all of the mentioned

Question 25

High pressure turbine is a Non-Condensing turbine due to______________  

A)exhaust conditions
B)axial flow of the steam
C)pressure-velocity compounding
D)velocity compounding