204. A dense white smoke from a chimney indicates
A.Insufficient air
B.Too much air
C.Correct air
D.Less turbulance

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205. In warming up a boiler, the temperature is increased
A.Uniformly and gradually
B.First slowly and then rapidly
C.First rapidly and then slowly
D.At any rate

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206. In warming up a boiler, the pressure is increased
A.Uniformly and gradually
B.First slowly and then rapidly
C.First rapidly and then slowly
D.At any rate

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207. Formation of scale on a boiler tube
A.Protects it
B.Increase its life
C.Decreases its life
D.Life is unaffected

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208. Which impurity in water requires critical attention on very high pressure boilers
A.Hydrogen
B.Ammonia
C.Silica
D.Dissolved salts

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209. A thermal power plant designed to operate in cold climate is operated in hot climate; it will develop
A.More power
B.Less power
C.Same power
D.More or less depedning on the size

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210. Caking is represented by
A.The left pure carbon whem coal is heated and volatile matter driven off
B.The formation of lumps or masses of coke
C.Fusing of ash
D.High ash content

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