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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Q. How does freeze-tolerance work?

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Q. Which of the following metals are used to make pipes of low cost solar water heating system?

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Q. Direct solar water heating systems ______

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Q. How is the heat transferred from transfer fluid to potable water in indirect solar water heating systems?

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Q. How is water heated in a direct solar water heating system?

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Q. Passive systems rely on heat-driven convection.

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Q. Which of the following is an example of direct solar water heating system?

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