Refrigerant Compressors


10 Questions MCQ Test Thermodynamics | Refrigerant Compressors


Description
This mock test of Refrigerant Compressors for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 10 Multiple Choice Questions for Mechanical Engineering Refrigerant Compressors (mcq) to study with solutions a complete question bank. The solved questions answers in this Refrigerant Compressors quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Refrigerant Compressors exercise for a better result in the exam. You can find other Refrigerant Compressors extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

The purpose of refrigerant compressor is to
1. raise the pressure of the refrigerant.
2. raise the temperature of the refrigerant.
3. circulate the refrigerant through the refrigerating system.
4. improve the condenser performance.

Q. Which of the above are correct?

Solution:
QUESTION: 2

The reciprocating refrigerant compressors are very much suitable for

Solution:
QUESTION: 3

The centrifugal compressors are generally used for refrigerants that require

Solution:
QUESTION: 4

The clearance volume in reciprocating refrigerant compressors the work done and the power required for compressing the refrigerant

Solution:
QUESTION: 5

The compressor of a domestic refrigerator has been noted to run for comparatively large durations. That indicates

Solution:
QUESTION: 6

The-pressure gauge on the discharge side of a refrigerant compressor reads too high. This could be due to
1. lack of cooling water
2. water temperature being high
3. dirty condenser surface
4. refrigerant temperature being too high

Q. Which of the above statements are valid?

Solution:
QUESTION: 7

Match the List-I (Refrigeration equipment) with List-ll (Characteristic) the following:
List-I
A. Hermetically sealed compressor
B. Semi-hermetically sealed
C. Open type compressor
D. Expansion device
List-Il
1. Capillary tube
2. Both compressor and-motor enclosed in a shell or casing
3. Both compressor and motor enclosed in a shell or casing with a removable cover
4. Driving motor not enclosed in a shell or casing and connected to the shaft driving the compressor

Solution:
QUESTION: 8

The best capacity control method suitable for domestic refrigerant compressor is

Solution:

Simple on -off or start-pump control in conjunction with a thermostat is used to take advantage in small unitary equipment, suhc as refrigerant, air conditioners, water coolers etc.

QUESTION: 9

The method of improving the volumetric efficiency include the following:
1. Providing clearance as large as possible.
2. Maintaining low pressure ratio.
3. Cooling during compression.
4. Reducing pressure drops at the valves by designing a light-weight valve mechanism, minimising valve overlaps and choosing suitable lubricating oils.

Q. Which of above statements are valid?

Solution:
QUESTION: 10

Consider the following capacity control method of centrifugal compressors:
1. Control of volume flow rate through a speed reduction gear
2. Variable inlet whirl vanes
3. Slide valve

Q. Which of the above is/are valid?

Solution:

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