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Compressors, Gas Turbines and Jet Engines MCQ Practice Test - Set 01

Review each question and reveal answers to strengthen your understanding

1 If the flow of air through the compressor is perpendicular to its axis, then it is a
✅ Correct Answer: 2
2 Gas turbines use following type of air compressor
✅ Correct Answer: 4
3 The gas in cooling chamber of a closed cycle gas turbine is cooled at
✅ Correct Answer: 3
4 The maximum combustion pressure in gas turbine as compared to I.C. engine is
✅ Correct Answer: 2
5 In a closed cycle gas turbine, the air is compressed
✅ Correct Answer: 3
6 The closed cycle in gas turbines
✅ Correct Answer: 1
7 The closed cycle in gas turbines
✅ Correct Answer: 1
8 The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
✅ Correct Answer: 3
9 Pick up the correct statement
✅ Correct Answer: 3
10 The degree of reaction is usually kept ________ for all types of axial flow compressors.
✅ Correct Answer: 4
11 Ram compression in turbojet involves
✅ Correct Answer: 1
12 A compressor mostly used for supercharging of I.C. engines is
✅ Correct Answer: 1
13 In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of
✅ Correct Answer: 3
14 The work-done on a compressor will be minimum if air is taken from
✅ Correct Answer: 3
15 In the aircraft propellers
✅ Correct Answer: 4
16 In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
✅ Correct Answer: 3
17 To avoid moisture troubles, the branch connections from compressed air lines should be taken from
✅ Correct Answer: 1
18 In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as
✅ Correct Answer: 3
19 To avoid moisture troubles, the compressed air main line should
✅ Correct Answer: 2
20 The volumetric efficiency of a compressor
✅ Correct Answer: 4
21 The efficiency and work ratio of a gas turbine plant can be increased by
✅ Correct Answer: 4
22 The capacity of compressor will be highest when its intake temperature is
✅ Correct Answer: 4
23 The volume of air sucked by the compressor during its suction stroke is called
✅ Correct Answer: 3
24 Which is false statement about multistage compression?
✅ Correct Answer: 2
25 Standard air is the air at ________ and relative humidity of 36 percent.
✅ Correct Answer: 2
26 Out of the following, from where you will prefer to take intake for air compressor
✅ Correct Answer: 2
27 Out of the following, from where you will prefer to take intake for air compressor
✅ Correct Answer: 4
28 When air is to be compressed at a high pressure, then it is advantageous to use
✅ Correct Answer: 3
29 In multistage compressor, the isothermal compression is achieved by
✅ Correct Answer: 3
30 The compressor capacity is defined as the
✅ Correct Answer: 2
31 The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is
✅ Correct Answer: 2
32 Reheating in a multistage expansion gas turbine ________ compressor work.
✅ Correct Answer: 2
33 Separators in compressor installations are located
✅ Correct Answer: 4
34 Pick up the wrong statement
✅ Correct Answer: 1
35 The overall isothermal efficiency of the compressor is defined as the ratio of
✅ Correct Answer: 4
36 Reciprocating air compressor is best suited for
✅ Correct Answer: 1
37 . Reciprocating air compressor is best suited for
✅ Correct Answer: 1
38 In a double acting compressor, the air is compressed
✅ Correct Answer: 3
39 After-cooler is used to
✅ Correct Answer: 3
40 Which of the following statement is correct?
✅ Correct Answer: 3
41 Mining industry usually employs following motive power
✅ Correct Answer: 2
42 The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
✅ Correct Answer: 4
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