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Steam Boilers | Engines
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Questions
Which of the following is NOT a boiler mounting?
ক
Steam stop valve
খ
Man hole
গ
Economizer
ঘ
Pressure gauge
Which of the following boiler is best suited to meet the fluctuating demand of steam?
ক
Locomotive boiler
খ
Lancashire boiler
গ
Babcock and Wilcox boiler
ঘ
Cornish boiler
Which of the following statement is correct for a compound steam engine?
ক
The forces in the working parts are increased as the forces are distributed over more parts
খ
The cost of the engine, for the same power and economy, is more than that of a simple steam engine
গ
The temperature range per cylinder is increased, with corresponding increase in condensation
ঘ
The ratio of expansion is reduced, thus reducing the length of stroke
A single acting steam engine produces __________ power than that of double acting steam engine.
ক
equal
খ
double
গ
half
ঘ
4 times
The expansion of steam in a nozzle follows
ক
Carnot cycle
খ
Rankine cycle
গ
Joule cycle
ঘ
Stirling cycle
In a uniflow engine
ক
Steam enters and exhausts through the same port
খ
Steam enters at one end and exhausts at the centre
গ
Steam enters at the centre and exhausts at the other end
ঘ
None of the above
The mechanical draught _________ with the amount of smoke.
ক
Increases
খ
Decreases
গ
Does not effect
ঘ
None of these
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of
ক
Higher effectiveness of boiler
খ
High calorific value coal being burnt
গ
Fouling of heat transfer surfaces
ঘ
Raising of steam temperature
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
ক
Blow off cock
খ
Fusible plug
গ
Stop valve
ঘ
Safety valve
The radius of a dished head is taken approximately as
ক
One fourth
খ
Half
গ
One
ঘ
Two
Boiler parameters are expressed by
ক
Tonnes/hr. of steam
খ
Pressure of steam in kg/cm<sup>2</sup>
গ
Temperature of steam in °C
ঘ
All of the above
The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks
ক
180° to each other
খ
90° to each other
গ
0° to each other
ঘ
None of these
The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks
ক
180° to each other
খ
90° to each other
গ
0° to each other
ঘ
None of these
The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks
ক
180° to each other
খ
90° to each other
গ
0° to each other
ঘ
None of these
The capacity of induced draft fan compared to forced draft fan in a boiler is
ক
Same
খ
More
গ
Less
ঘ
Less or more depending on size of boiler
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