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.

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Compressors,Gas Dynamics and Gas Turbines MCQs | Page 7 of 17

Q61.
For maximum work, the reheating should be done to an intermediate pressure of (where p1 = Maximum pressure, and p2 = Minimum pressure)
Discuss
Answer: (d).p₁ p₂
Q62.
The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p1 = Intake pressure of air, p2 = Intercooler pressure, and p3 = Delivery pressure of air)
Discuss
Answer: (c).p2 = p1 x p3
Q63.
The pressure of air at the beginning of the compression stroke is __________ the atmospheric pressure.
Discuss
Answer: (b).less than
Q64.
The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.
Discuss
Answer: (a).Correct
Q65.
If p1 is the pressure of air entering the L.P, cylinder and p3 is the pressure of air leaving the H.P. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by
Discuss
Answer: (d).D1/D2 = (p3/p1)1/4
Discuss
Answer: (a).increases the thermal efficiency
Q67.
In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
Discuss
Answer: (a).equal to
Q68.
Workdone by an air compressor __________ upon the way in which the air is compressed.
Discuss
Answer: (a).depends
Q69.
In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.
Discuss
Answer: (a).Agree
Q70.
In a compressed air system, the temperature of air discharged from the air motor is __________ than the initial compressor intake temperature.
Discuss
Answer: (b).less