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Steam Power Plant

Total questions: 33

Worksheet time: 17mins

Name
Class
Date
1.

Which of the following factors does bursting pressure of boiler doesn't depend

a)

Tensile strength of the shell

b)

Thickness of the shell

c)

Diameter of the shell

d)

Shear strength of shell material

2.

Which of the following factors does working pressure of boiler doesn't depend

a)

Tensile strength of shell

b)

Thickness of shell

c)

Factor of safety

d)

Type of fuel being fired

3.

Total solid impurities in feed water for a boiler depend upon

a)

boiler pressure

b)

quantity of steam to be generated

c)

type of fuel available

d)

quantity of steam

4.

A high pressure chamber or a device in which the paths of rapidly moving particles can be observed in photographed

a)

Cloud chamber

b)

Combustion chamber

c)

Fission chamber

d)

Air chamber

5.

The formation of gas bubbles in a liquid is called

a)

bubbling

b)

foaming

c)

priming

d)

carryover

6.

How many check valves should be provided between any feed pump and boiler

a)

1

b)

2

c)

3

d)

4

7.

The water level inside the boiler is indicated by the

a)

baffles

b)

fusible plug

c)

water walls

d)

water column

8.

What is the highest pressure under which distinguishable liquid in vapor phases can exist in equilibrium?

a)

Maximum pressure

b)

Atmosphere

c)

Critical pressure

d)

Peak pressure

9.

What is the average fuel - oil temperature range of the oil in the discharge line to the boiler?

a)

180 - 200°F

b)

240 - 260 °F

c)

160 - 180 °F

d)

140 - 160 °F

10.

The lowest permissible water level of a boiler without internal furnace is ___ the height of the shell.

a)

1/2

b)

1/3

c)

1/4

d)

1/5

11.

In case of steam engine the cut off ratio is the ratio of

a)

pressure at cut off to supply pressure

b)

pressure at cut off to exhaust pressure

c)

pressure of cut off to mean effective pressure

d)

fraction of piston stroke which the piston traveled when cut off occurs

12.

In a condensing steam engine

a)

condensed stean is supplied

b)

steam condenses inside the cylinder

c)

steam condenses as soon as it leaves the cylinder

d)

exhaust steam is condensed in a condenser

13.

Flows through the nozzles and diffusers with increasing fluid velocity will create an equivalent

a)

decrease in the static enthalpy of fluid

b)

increase in the static enthapy of fluid

c)

decrease in the internal enegy of the fluid

d)

decrease in the dynamic enthalpy of fluid

14.

The term V2/2cp responds to the temperature rise during such a process is called the

a)

kinetic temperature

b)

high temperature

c)

dynamic temperature

d)

elevation temperature

15.

All of the following mechanism can supply heat to a thermodynamic system except

a)

conduction

b)

natural convection

c)

adiabatic expansion

d)

radiation

16.

The flow through the nozzle is

a)

isentropic

b)

polytropic

c)

isobaric

d)

isovolumic

17.

If the reservoir is sufficiently large, the nozzle inlet velocity is

a)

maximum

b)

negative

c)

positive

d)

zero

18.

Which of the following is the pressure applied the nozzle discharge section

a)

Stagnant pressure

b)

Critical pressure

c)

Back pressure

d)

Atmospheric pressure

19.

When the back pressure is reduced to lowest exit pressure, the mass flow reaches a maximum value and the flow is said to be

a)

stacked

b)

choked

c)

stuck-up

d)

clog-up

20.

An increase in stagnation pressure will increase the max flux through the

a)

diverging nozzle

b)

converging nozzle

c)

converging - diverging nozzle

d)

none of these

21.

A converging - diverging nozzle is the standard equipment in

a)

subsonic aircraft

b)

supersonic aircraft

c)

hypersonic aircraft

d)

trisonic aircraft

22.

For back pressure valves, abruot changes in fluid properties occur in a very thin section of converging-diverging nozzle under supersonic flow conditions, creating

a)

sound wave

b)

tidal wave

c)

shock wave

d)

none of these

23.

is the locus of states which have the same vakue of stagnation enthalpy and mass flux are called

a)

Fanno Line

b)

Straight Line

c)

Willan's Line

d)

Cross Cut Line

24.

Combination of mass and momentum equationsinto single equation abd plotted in h-s plane yield a curve called

a)

Fair Line

b)

Freh Line

c)

Cutting Line

d)

Rayleigh Line

25.

Generally steam turbines in power station operate at

a)

3000 rpm

b)

1000 rpm

c)

4000 rpm

d)

575 rpm

26.

Which of the following shows the relationship of the steam consumption and the load of steam turbine - generator?

a)

Dalton's Line

b)

Willan's Line

c)

Jonval's Line

d)

Rankine Line

27.

An inventor proposes to develop electrical power by withdrawing heat from the geyser fields of northern California and converting it all to work in power turbines. This scheme will not work because

a)

the geyser fields have only a limited lifetime

b)

the salinity of steam is too great

c)

it violates the first law of thermodynamics

d)

it violates the second law of thermodynamics

28.

The isotropic efficiency of a turbine is given by

a)

the ratio of actual to ideal energy extracted

b)

the ratio of actual to ideal energy inputted

c)

the ratio of ideal to actual energy extracted

d)

none of the above

29.

Which of the followong is not a main part of a tyoical coal burner?

a)

Air registers

b)

Nozzle

c)

Atomizer

d)

Ignitor

30.

Measure of ability of a boiler to transfer the heat given by the furnace to the water and steam is

a)

grate efficiency

b)

stroke efficiency

c)

furnace efficiency

d)

boiler efficiency

31.

A goose neck is installed in the line connecting a steam gauge to a boiler to

a)

maintain constant steam flow

b)

protect the gauge element

c)

prevent steam knocking

d)

maintain steam pressure

32.

Which of the following is a great advantage of a fire tube boiler?

a)

Steam pressure is not ready

b)

contains a large volume of water and requires long interval of time to raise steam and not so flexible as to changes in steam demand

c)

cannot use impure water

d)

Radiation losses are higher because fire is inside the boiler and surrounded by water

33.

One of the following tasks which is an example of preventive

a)

cleaning the cup on a rotary cup burner

b)

cleaning a completely clog oil strainer

c)

replacing a leaking valve

d)

replacing a blown fuse