Q. Evacuated tube solar collectors use a glass tube to surround absorber with high vacuum.

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Q. Which of the following is used to make a glass-glass evacuated tubes?

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Q. Which of the following is a problem with evacuated tubes?

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Q. Why does flat plate collector perceived to have higher efficiency than evacuated tube solar collector in terms of area?

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Q. _______ lose more heat to the environment than evacuated-tube solar collectors.

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Q. Which of the following are combined to form an evacuated flat plate solar collector?

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Q. Which of the following provides highest energy conversion efficiency in non-concentrating solar collectors?

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Q. What is the metal sheet absorber surrounded with in an evacuated flat plate collector?

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Q. Which of the following organisations developed first high vacuum insulation?

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Q. Why does an evacuated flat plate collector require a glass-metal seal?

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Q. Which of the following pumps is used in an evacuated-tube solar collector?

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Q. Evacuated flat-plate solar collectors use _______ pumps.

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Q. What advantage does polymer collector have over metal collector?

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Q. Bowl collectors operate similarly to _______

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Q. Polymer flat plate collectors can use plain water.

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Q. Bowl collectors use a fixed curved receiver.

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Q. What is solar water heater?

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Q. Which of the following determines complexity and size of solar water heating system?

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Q. What is freeze protection in a solar water heating system?

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Q. What are drainback systems in solar water heating system?

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