Compressors,Gas Dynamics and Gas Turbines MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Compressors,Gas Dynamics and Gas Turbines, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Compressors,Gas Dynamics and Gas Turbines MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Compressors,Gas Dynamics and Gas Turbines mcq questions that explore various aspects of Compressors,Gas Dynamics and Gas Turbines problems. Each MCQ is crafted to challenge your understanding of Compressors,Gas Dynamics and Gas Turbines principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Compressors,Gas Dynamics and Gas Turbines MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Compressors,Gas Dynamics and Gas Turbines. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Compressors,Gas Dynamics and Gas Turbines knowledge to the test? Let's get started with our carefully curated MCQs!

Compressors,Gas Dynamics and Gas Turbines MCQs | Page 12 of 17

Discover more Topics under Mechanical Engineering

Q111.
If the flow of air through the compressor is perpendicular to its axis, then it is a

a.

reciprocating compressor

b.

centrifugal compressor

c.

axial flow compressor

d.

turbo compressor

Discuss
Answer: (b).centrifugal compressor
Q112.
In air compressors, free air delivery means the

a.

actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions

b.

volume of air delivered by the compressor

c.

volume of air sucked by the compressor during its suction stroke

d.

none of the above

Discuss
Answer: (a).actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
Q113.
The overall isothermal efficiency of the compressor is defined as the ratio of

a.

work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio

b.

isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

c.

volume of free air delivery per stroke to the swept volume of the piston

d.

isentropic power to the power required to drive the compressor

Discuss
Answer: (b).isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
Q114.
The minimum work required for a three stage reciprocating air compressor is __________ the work required for each stage.

a.

equal to

b.

double

c.

three times

d.

six times

Discuss
Answer: (c).three times
Q115.
For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.

a.

True

b.

False

c.

Can't say

d.

None of these

Discuss
Answer: (a).True
Q116.
In a high pressure compressor, the delivery pressure is

a.

1 to 5 bar

b.

5 to 8 bar

c.

8 to 10 bar

d.

10 to 15 bar

Discuss
Answer: (c).8 to 10 bar
Q117.
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be

a.

forward curved

b.

backward curved

c.

radial

d.

none of these

Discuss
Answer: (a).forward curved
Q118.
Standard air is the air at __________ and relative humidity of 36 percent.

a.

0.1 bar and 20° C

b.

1 bar and 20° C

c.

0.1 bar and 40° C

d.

1 bar and 40° C

Discuss
Answer: (b).1 bar and 20° C
Q119.
In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during

a.

isothermal compression

b.

isentropic compression

c.

polytropic compression

d.

none of these

Discuss
Answer: (b).isentropic compression
Q120.
The compressor capacity is defined as the

a.

actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions

b.

volume of air delivered by the compressor

c.

volume of air sucked by the compressor during its suction stroke

d.

none of the above

Discuss
Answer: (b).volume of air delivered by the compressor
Page 12 of 17