MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration Questions And Answers Refrigerant Compressors 1 knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Pressure or compression ratio is always __________ |
| A. | equal to one |
| B. | less than one |
| C. | greater than one |
| D. | zero |
| Answer» D. zero | |
| 2. |
Mixture of liquid and vapour state of refrigerant reduces overall work done. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 3. |
Clearance volume can be zero. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 4. |
What is the volumetric efficiency? |
| A. | V<sub>P</sub> / V<sub>S</sub> |
| B. | V<sub>C</sub> / V<sub>S</sub> |
| C. | V<sub>S</sub> / V<sub>C</sub> |
| D. | V<sub>S</sub> / V<sub>P</sub> |
| Answer» E. | |
| 5. |
What the meaning of VS? |
| A. | Surface volume |
| B. | Suction volume |
| C. | Swept volume |
| D. | Secondary piston volume |
| Answer» C. Swept volume | |
| 6. |
What is the volume of the amount of refrigerant passing through compressor called? |
| A. | Compressor rating |
| B. | Compressor ratio |
| C. | Compressor capacity |
| D. | Compressor efficiency |
| Answer» D. Compressor efficiency | |
| 7. |
What is the value of the clearance factor?If, VC = Clearance volume and VP = Piston displacement volume |
| A. | V<sub>C</sub> x V<sub>P</sub> |
| B. | V<sub>C</sub> / V<sub>P</sub> |
| C. | V<sub>P</sub> / V<sub>C</sub> |
| D. | V<sub>C</sub> + V<sub>P</sub> |
| Answer» C. V<sub>P</sub> / V<sub>C</sub> | |
| 8. |
What is the formula for swept volume?If, D = Diameter of cylinder |
| A. | nL = Length of the piston stroke |
| B. | D L |
| C. | D L / 2 |
| D. | D L / 4 |
| E. | D<sup>2</sup> L / 4 |
| Answer» E. D<sup>2</sup> L / 4 | |
| 9. |
How is the compressor ratio defined in terms of volume? |
| A. | Clearance volume / Total volume of the cylinder |
| B. | Clearance volume / Swept volume of the cylinder |
| C. | Total volume of cylinder / Clearance volume of the cylinder |
| D. | Total volume of cylinder / Swept volume of the cylinder |
| Answer» D. Total volume of cylinder / Swept volume of the cylinder | |
| 10. |
Which represents compressor ratio or pressure ratio among the following? |
| A. | Relative discharge pressure / Relative suction pressure |
| B. | Relative discharge pressure / Absolute suction pressure |
| C. | Absolute discharge pressure / Relative suction pressure |
| D. | Absolute discharge pressure / Absolute suction pressure |
| Answer» E. | |
| 11. |
What is the pressure at the inlet of a refrigerant compressor? |
| A. | Critical pressure |
| B. | Suction pressure |
| C. | Discharge pressure |
| D. | Backpressure |
| Answer» C. Discharge pressure | |
| 12. |
What is the pressure at the outlet of a refrigerant compressor? |
| A. | Critical pressure |
| B. | Suction pressure |
| C. | Discharge pressure |
| D. | Backpressure |
| Answer» D. Backpressure | |
| 13. |
What must be the state of refrigerant entering the compressor? |
| A. | Dry saturated vapour refrigerant |
| B. | Dry saturated liquid refrigerant |
| C. | Vapour and liquid mixture |
| D. | Superheated vapour refrigerant |
| Answer» E. | |
| 14. |
What is the purpose of using a refrigerant compressor? |
| A. | Raise the temperature of refrigerant |
| B. | Reduce the temperature of refrigerant |
| C. | Reduce the pressure of refrigerant |
| D. | Expand the refrigerant |
| Answer» B. Reduce the temperature of refrigerant | |