Renewable Sources of Energy Mcqs

This set of Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Renewable Sources of Energy ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Chemical Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Renewable Sources of Energy comprehensively.

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91.
For optimum storage of heat with rocks small pebbles should be utilized because

This gives a large surface area to mass ratio

This gives a small surface area to mass ratio

This increases their specific heat

The economical cost of the rocks is decreased

92.
Which of the following statements about using water as a heat-exchange fluid in flat-plate collectors is not true?

It is convenient to obtain and handle

It has a large heat capacity

A large amount of electric power is required to run the water pump

Freeze protection can be obtained by mixing with ethylene glycol

93.
A pure substance at its triple point

Exists in gas liquid and solid phases simultaneously

Changes directly from solid to vapour

Loses phase distinction between liquid and vapour

Behaves as an ideal gas

94.
When moist air is cooled by sensible heat removal which of the following is incorrect?

Neither relative humidity nor specific humidity changes

Specific humidity changes but not relative humidity

Both relative humidity and specific humidity change

None of the above

95.
Solar pond is a body of saline water in which the salt concentration

Increases from the top surface to the bottom surface

Decreases from the top surface to the bottom surface

Remains the same in the whole pond

None of the above

96.
Solar pond usually consists of an upper convective layer (UCL) a nonconvective layer (NCL) and a lower lower convective layer (LCL). The solar energy is stored in

UCL

NCL

LCL

UCL and LCL

97.
In solar ponds the upper convective layer

Has no useful role in energy collection

Is caused by wind action and heat transfer

Is considered a homogeneous low salinity layer

All of the above

98.
In solar ponds the transfer of heat and salt is convective in the where UCL NCL and LCL are upper convective layer nonconvective layer and lower convective layer respectively

UCL and LCL

UCL and NCL

NCL and LCL

UCL NCL and LCL

100.
The nonconvective layer of solar ponds is an example of

Single diffusive system

Double diffusive system

Triple diffusive system

None of the above

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