Practice Steam Boilers And Engines Multiple Choice Questions with Answers Quiz-2

Q.1.

A safety valve usually employed with stationary boilers is

lever safety valve
dead weight safety valve
high steam and low water safety valve
all of these

Q.2.

The function of a piston rod is

to guide motion of the piston rod and to prevent it from bending
to transfer motion from the piston to the cross head
to convert heat energy of the steam into mechanical work
to exhust steam from the cylinder at proper moment

Q.3.

A single acting steam engine produces __________ power than that of double acting steam engine.

equal
half
double
four times

Q.4.

Cut-off governing of steam engines is a method of controlling the engine output by varying

volume of intake steam
pressure of intake steam
temperature of intake steam
all of these

Q.5.

Which of the following boiler is best suited to meet the fluctuating demand of steam ?

Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler

Q.6.

The fire tubes in a Scotch marine boiler are

horizontal
vertical
inclined

Q.7.

Loeffler boiler is a water tube boiler using a forced circulation of water.

True
False

Q.8.

The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure.

equal to
less than
higher than

Q.9.

In a boiler, feed water supplied per hour iskg while coal fired per hour iskg. The net enthalpy rise per kg of water iskJ. If the calorific valve of the coal iskJ/kg, then the boiler efficiency will be

56%
63%
74%
78%

Q.10.

An air preheater is installed

before the economiser
before the superheater
between the economiser and chimney
none of these

Q.11.

In a reciprocating steam engine, the heat energy in the steam is converted into mechanical work by the to and fro motion of the piston.

Agree
Disagree

Q.12.

La-mont boiler, is a high pressure water tube steam boiler working on forced circulation.

Agree
Disagree

Q.13.

The function of a flywheel is

to convert reciprocating motion of the piston into rotary motion.
to convert rotary motion of the crankshaft into to and fro motion of the valve rod
to prevent fluctuation of speed
to keep the engine speed uniform at all load conditions

Q.14.

A safety valve mainly used with locomotive and marine boilers is

lever safety valve
dead weight safety valve
high steam and low water safety valve
spring loaded safety valve

Q.15.

The length of shell of a Locomotive boiler is

1 m
2 m
3 m
4 m

Q.16.

The effect of wire drawing is to decrease the area of indicator diagram and thus work done by the engine is reduced.

Agree
Disagree

Q.17.

The power of a boiler may be defined as

the ratio of heat actually used in producing the steam to the heat liberated in the furnace
the amount of water evaporated or steam produced in kg per kg of fuel burnt
the amount of water evaporated from and at 100° C into dry and saturated steam
the evaporation of 15.653 kg of water per hour from and at 100° C

Q.18.

The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.

True
False

Q.19.

The rate of steam produced in Benson boiler is

100 tonnes/h
135 tonnes/h
175 tonnes/h
250 tonnes/h

Q.20.

In a uniflow engine

steam enters and exhausts through the same port
steam enters at one end and exhausts at the centre
steam enters at the centre and exhausts at the other end
none of the above

Q.21.

When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as

internally fired boiler
externally fired boiler
natural circulation boiler
forced circulation boiler

Q.22.

Which of the following statement is correct for a compound steam engine ?

The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
The forces in the working parts are increased as the forces are distributed over more parts.
The ratio of expansion is reduced, thus reducing the length of stroke.
The temperature range per cylinder is increased, with corresponding increase in condensation.

Q.23.

In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.

Correct
Incorrect

Q.24.

Which of the following statement is correct ?

Lancashire boiler is a fire tube boiler.
Fire tube boilers are internally fired.
Babcock and Wilcox boiler is a water tube boiler.
all of the above

Q.25.

The shell diameter of a Locomotive boiler is

1 m
1.5 m
2 m
2.5 m

Q.26.

The function of a safety valve is

to blow off steam when the pressure of steam inside the boiler exceeds the working pressure
to indicate the water level inside the boiler to an observer
to measure pressure of steam inside the steam boiler
none of the above

Q.27.

When the speed of the crankshaft is betweenr.p.m. andr.p.m., the engine said to be a

slow speed engine
medium speed steam engine
high speed steam engine
none of these

Q.28.

The cut-off ratio is the reciprocal of expansion ratio,

Correct
Incorrect

Q.29.

The selection of type and size of a steam boiler depends upon

the power required and working pressure
the geographical position of the power house
the fuel and water available
all of the above

Q.30.

In a receiver type compound engine, the high pressure and low pressure cylinders

have common piston rod
are set at 90°
have separate piston rods
are set in V - arrangement

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