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281.

In pumped storage systems, water is pumped

A.	Upstream during peak load periods	B.	Upstream during off peak periods
C.	Upstream during off season	D.	None of the above

282.

Live storage of fuel means

A.	Fuel stored to meet day's requirement for the boiler	B.	Fuel stored for supply at any time during emergency
C.	Fuel stored at the plant	D.	Fuel stored near the burners
E.	None of the above

283.

A sample of water having pH value of 7 is

A.	Acidic	B.	Alkaline
C.	Neutral

284.

Turbidity in boiler feed water causes

A.	Sludge	B.	Embrittlement
C.	Corrosion	D.	Scale
E.	None of the above

285.

Which is not the cause for loss of heat in boiler due to incomplete combustion?

A.	Insufficient air supply	B.	Improper secting of boiler
C.	Fuel bend in proof condition	D.	Under cooling of furnace at low ratings
E.	Boiler drum uninsulated

286.

Coking is

A.	Formation of lumps or masses of coke in boiler furnaces at high temperatures	B.	Heating of coal in absence of air driving carbon and leaving behind the residue of carbon
C.	Burning of coal in a furnace	D.	Producing lumps of coal from fine powders with the help of a binder
E.	None of the above

287.

Coking is

A.	In boiler furnace some coal becomes plastic and forms lumps or masses of coke	B.	Making cakes of coal out of fine powders
C.	Coal produced from burning of wood in inert atmosphere	D.	Free burning coals are known as coking coals
E.	None of the above

288.

In an analysis report of a sample of coal, the percentage of one of the constituents is specified as 2.5%. This constituent could be

A.	Carbon steel	B.	Ash
C.	Moisture	D.	Sulphur

289.

A coal contains 3.5% sulphur by weight, as fired, and all the sulphur may be assumed to go to formation of sulphur dioxide. How many tonnes of SO2 are produced per day of the firing rate is 35 tonnes per hour

A.	48.8	B.	54.8
C.	58.8	D.	60.8
E.	100

290.

Consumption of diesel in a diesel engine per BHP per hour is in the range

A.	100-150 gm	B.	150-180 gm
C.	185-210 gm	D.	215-300 gm
E.	500-800 gm