Deck 10: Steam Boilers and Turbines: Types, Characteristics, and Applications

Question 1

Which of the following is a water tube boiler?

A)lancashire boiler
B)cochran boiler
C)babcock & wilcox boiler
D)locomotive boiler

Answer 1

babcock & wilcox boiler

Question 2

The number of fire tubes in a Cochran boiler are ___________

A)75
B)165
C)225
D)175

Answer 2

165

Question 3

The chimney draught varies with?

A)climatic conditions
B)temperature of furnace gases
C)height of chimney
D)all of the mentioned

Answer 3

all of the mentioned

Question 4

The diagram factor is the ratio of ___________

A)area of actual indicator diagram to the area of theoretical indicator diagram
B)actual work done per stroke to the theoretical work done per stroke
C)actual mean effective pressure to the theoretical mean effective pressure
D)any of the above mentioned

Question 5

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

A)3.5 to 4.5m
B)1.5 to 2m
C)2.5 to 3.5m
D)none of the mentioned

Question 6

Lancashire boiler has _____ internal flue tubes.

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

Question 7

Locomotive boiler is a ___________

A)single tube, vertical, externally fired & stationary boiler
B)single tube, horizontal, internally fired& stationary boiler
C)multitubular, horizontal, externally fired & stationary boiler
D)multitubular, horizontal, internally fired & mobile boiler

Question 8

The equivalent evaporation is defined as?

A)the ratio of heat actually used in producing the steam to the heat liberated in the furnace
B)the amount of water evaporated or steam produced in kg of fuel burnt
C)the amount of water evaporated from and at 100 degree c into dry & saturated steam
D)none of the mentioned

Question 9

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 10

Condensing turbine is used for __________

A)central power generation
B)to reduce outlet temperature
C)to increase efficiency of steam
D)none of the mentioned

Question 11

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 12

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

Question 13

Impulse blades are in the shape of __________

A)rain drop
B)circular
C)half moon
D)none of the mentioned

Question 14

Astern turbines are used in _________

A)power generation
B)marine purposes
C)aircraft
D)none of the mentioned

Question 15

In condensing turbines vacuum is obtained by ____________

A)sudden pressure drop
B)removal of non condensable gases
C)sudden drop in pressure and by removal of non condensable gases
D)none of the mentioned

Question 16

Cross compound steam turbines are once used in _____________

A)generation of electricity
B)marine ships
C)automobiles
D)none of the mentioned

Question 17

Where in industries do we find back-pressure turbines?

A)at a point in industry where waste steam has to be employed
B)when pressure needs to be applied at rear end
C)when one turbine bolster other
D)there is a requirement of process steam at single pressure

Question 18

The energy conversion occurring in a steam turbine is a ______ step process.

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

Question 19

A steam turbine is basically an assemblage of ____________

A)nozzle & condenser
B)blades & condenser
C)nozzle & blades
D)nozzle & fans

Question 20

A regenerative steam cycle renders ____________

A)decreased work output per unit mass of steam
B)increased thermal efficiency
C)increased work output per unit mass of steam
D)decreased work output per unit mass of steam as well as increased thermal efficiency

Question 21

The reheat factor is the ratio of the ____________

A)total useful heat drop to the total isentropic heat drop
B)cumulative heat drop to the isentropic heat drop
C)isentropic heat drop to the heat supplied
D)none of the mentioned

Question 22

Thermal equilibrium means that the flow of steam is ____________

A)hyperbolic
B)isothermal
C)isentropic
D)polytropic

Question 23

Multi-stage steam turbines are of the ___________

A)reaction type
B)velocity compounded type
C)pressure compounded type
D)all of the mentioned

Question 24

The impulse reaction turbine has its driving force ___________

A)partly as an impulsive force and partly as a reaction force
B)as an impulsive force
C)as a reaction force
D)none of the mentioned

Question 25

In a nozzle, whole frictional loss is assumed to occur between ___________

A)inlet and throat
B)throat and exit
C)inlet and outlet
D)none of the mentioned