DSES SESSIONAL-1

The rate at which radiant energy is incident on a surface per unit

area of surface is called?

• Total Solar Radiation

• Irradiance

• Irradiation or Radiant Exposure

• None of these

Which of the following is NOT used in a passive solar heating/cooling system?

• Building walls

• Building roofs

• Air conditioners

• Building floors

What is a solar collector?

• A system to collect heat by absorbing sunlight

• A system to collect rainwater using sunlight

• A system to collect electricity by using sunlight

• A device to reflect sunlight back

A pyrometer is used for the measurements of

• Diffuse radiations only

• Direct radiations only

• Both direct and diffused radiations.

• None of the above

In a solar collector, why is the transparent cover provide for?

• Protect the collector from dust

• Reduce the heat losses from collector beneath to atmosphere

• Transmit solar radiation only

• All of the above.

Systems for space heating that use mechanical equipments such as pump , fans , blowers to help with the collecetion, distribution of heat throughout the house are called as?

• Active solar heating systems

• Passive solar heating systems

• Thermal mass

• Solar PV systems

"As the sun shines on the collector, the water inside the collector flow-tubes is heated. As it heats up, this water expands slightly and becomes lighter than the cold water in the solar storage tank mounted above the collector. Gravity then pulls heavier, cold water down from the tank and into the collector inlet. The cold water pushes the heated water through the collector outlet and into the top of the tank, thus heating the water in the storage tank."

The above said system is called as?

• Thermosyphon systems

• Integral collector storage (ICS) systems

• Indirect active systems

• None of these

Evacuated flat-plate solar collectors are a type of _______

• concentrating collectors

• photovoltaic technology

• non-concentrating collectors

• solar stills

A system that collects and concentrates sunlight to produce the high temperature heat needed to generate electricity is known as?

• Solar thermal power generation systems

• Solar PV systems

• Solar space heating systems

• Thermosiphon systems

A system in which water is heated directly by the sun and the storage tank serves as the solar collector is known as?

• Thermosyphon system

• Solar PV systems

• Vapour Absorption systems

• Integral collector storage (ICS) systems