MCQs of Draught System (Power Plant Engineering - 2171910)

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The function of the draught system is

(a)	to supply a sufficient quantity of air to the furnace for complete combustion of fuel.
(b)	to overcome the resistance contributed by flue gas passages to the flow of air & flue gas.
(c)	to discharge exhaust gases at sufficient height to avoid pollution in the atmosphere
(d)	all of these

When is artificial draught preferred?

(a)	When the quick evacuation of flue gases is required
(b)	When we choose large power plant systems
(c)	When draught produced by the chimney is not sufficient
(d)	When there are many components inside the boiler

Where is the fan installed in a forced draught system?

(a)	Near the boiler
(b)	Base of the chimney
(c)	Above the boiler
(d)	Between economizer and air preheater

The draught system is defined as

(a)	a device used to pull in air
(b)	the difference between absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure
(c)	the sum of the absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure
(d)	none of these

Natural draught produced by a chimney depends upon __________.

(a)	density of chimney gases
(b)	height of the chimney
(c)	both the density of chimney gases and height of the chimney
(d)	none of the mentioned

Why boiler draught is most essential part of the thermal plants?

(a)	Serves combustion by supplying ample amount of air
(b)	Helps in maintaining air ventilation
(c)	Required to maintain constant air flow
(d)	Stabilizes the boiler system

Which of these terms defines the pressure difference in the furnace?

The draught may be produced by a_____________.

The draught produced by the chimney is________________.

10.

In natural draught, increase in height of the chimney, the draught will

(a)	increases
(b)	decreases
(c)	remains constant
(d)	first increases then decreses

Showing 1 to 10 out of 26 Questions