MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Solar Energy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Evacuated tube solar collectors use a glass tube to surround absorber with high vacuum. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
For better efficiency, solar collectors do not coat their transparent cover with an anti-reflective coating. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
What is a heat pipe? |
| A. | A heat-transfer device |
| B. | A pipe made of heat |
| C. | A pipe that consists of heat |
| D. | A heat pumping device |
| Answer» B. A pipe made of heat | |
| 4. |
Which of the following are used as absorbers in evacuated-tube solar collectors? |
| A. | Carbon tubes |
| B. | Wooden or metallic tubes |
| C. | Plastic or glass tubes |
| D. | Metallic or glass tubes |
| Answer» E. | |
| 5. |
Evacuated flat-plate solar collectors are a type of _______ |
| A. | concentrating collectors |
| B. | photovoltaic technology |
| C. | non-concentrating collectors |
| D. | solar stills |
| Answer» D. solar stills | |
| 6. |
Which of the following is a circulating fluid in evacuated flat-plate solar collectors? |
| A. | Water |
| B. | Steam |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» C. Nitrogen | |
| 7. |
Adding antifreeze agents to water _________ |
| A. | increases its durability as coolant |
| B. | decreases its durability as coolant |
| C. | turns water into a coolant |
| D. | prevents water from acting as a coolant |
| Answer» B. decreases its durability as coolant | |
| 8. |
Why are antifreeze solutions (antifreeze agents with water) used as coolants in freezing climates? |
| A. | To increase boiling point of water |
| B. | To decrease boiling point of water |
| C. | To increase freezing point of water |
| D. | To decrease freezing point water |
| Answer» E. | |
| 9. |
Which of the following is generally used as circulating fluid in freezing climates? |
| A. | Liquid carbon dioxide |
| B. | Water |
| C. | A mixture of propylene glycol and water |
| D. | Liquid nitrogen |
| Answer» D. Liquid nitrogen | |
| 10. |
Which of the following is generally used as circulating fluid in tropical and sub-tropical climates? |
| A. | A mixture of ethylene glycol and water |
| B. | Water |
| C. | A mixture of propylene glycol and water |
| D. | Glycerol |
| Answer» C. A mixture of propylene glycol and water | |
| 11. |
Why is a transparent cover used in a flat plate collector? |
| A. | To maximize transmission of the incident sunlight into the box |
| B. | To minimize transmission of the incident sunlight into the box |
| C. | To entirely reflect the incident sunlight back |
| D. | To ensure partial transmission of the incident sunlight into the box |
| Answer» B. To minimize transmission of the incident sunlight into the box | |
| 12. |
What are the components of a flat plate collector? |
| A. | Flat box, a plate with reflective coating and fluid circulation passageways, an opaque cover, a circulating fluid |
| B. | Flat box, a dark coloured plate with fluid circulation passageways, an opaque, a circulating fluid |
| C. | Flat box, a dark coloured plate with fluid circulation passageways, a transparent cover |
| D. | Flat box, a dark coloured plate fluid circulation passageways, a transparent cover, a circulating fluid |
| Answer» E. | |
| 13. |
Aperture area of a solar collector is roughly equal to _______ |
| A. | Coolant area |
| B. | Generator area |
| C. | Absorber area |
| D. | System area |
| Answer» D. System area | |
| 14. |
What is aperture area in a solar collector? |
| A. | Area of the system |
| B. | Area in the receiver that receives the solar radiation |
| C. | Area occupied by the system after installation |
| D. | Cross-sectional area of the receiver |
| Answer» C. Area occupied by the system after installation | |