Steam Boilers Engines Nozzles and Turbines

191. Which of the following is steam dbal

1. non-coking bituminous coal
2. brown coal
3. pulverised coal
4. coking bituminous coal
5. none of the above.

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192. Which of the following substance will have same percentage in both proximate and ultimate analysis

1. ash
2. volatile matter
3. moisture
4. hydrogen
5. none of the above.

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193. Which of the following varieties of coals is mostly used in steam boilers

1. non-coking bituminous coal
2. brown coal
3. peat
4. coking bituminous coal
5. none of the above.

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194. Which type of boiler can meet rapid changes of load

1. vertical fire tube type
2. horizontal fire tube type
3. horizontal water tube type
4. vertical water tube type
5. forced circulation type.

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195. While steam expands in turbines, theoretically the entropy

1. remains constant
2. increases
3. decreases
4. behaves unpredictably
5. none of the above.

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196. With increase in load, convection superheater has

1. drooping characteristic
2. linear characterisstic
3. rising characteristic
4. flat characteristic
5. none of the above.

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197. With increase in load, radiant superheater has

1. drooping characteristic
2. lihear characterisstic
3. rising characteristic
4. flat characteristic
5. none of the above.

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