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Compressors QUESTIONS AND ANSWERS

Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part5 : 11 to 15

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

11.The closed cycle in gas turbines

provides greater flexibility

provides lesser flexibility

in never used

is used when gas is to be burnt

none of the above.

12.Water gas is produced by

carbonation of coal

passing steam over incandescent coke

passing air and a large amount of steam over waste coal at about 65�C

partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast

same way as the natural gas.

13.The material commonly used for air craft gas turbine is

stainless steel

high alloy' steel

duralumin

Timken, Haste and Colonel alloys

titanium.

14.Gas turbine blades are given a rake

equal to zero

in the direction of motion of blades

opposite to the direction of motion of blades

depending on the velocity

none of the above.

15.There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

remain same

decrease

increase

unpredictable

none of the above.

More Compressors QUESTIONS AND ANSWERS available in next pages