Test: Solar Refrigeration

# Test: Solar Refrigeration - Mechanical Engineering

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## 8 Questions MCQ Test - Test: Solar Refrigeration

Test: Solar Refrigeration for Mechanical Engineering 2023 is part of Mechanical Engineering preparation. The Test: Solar Refrigeration questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Solar Refrigeration MCQs are made for Mechanical Engineering 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Solar Refrigeration below.
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Test: Solar Refrigeration - Question 1

### What is the instantaneous sol-air temperature for a wall with the following conditoins? Total of direct and diffuse solar radiation: 250 W/m2 Absorptivity of surface : 0.8 Outside surface heat-transfer coefficient: 25 W/m2K Outside air temperature : 35°C

Detailed Solution for Test: Solar Refrigeration - Question 1

Sol-air temperature,

Test: Solar Refrigeration - Question 2

### Which of the following is considered as hypothetical temperature to calculate the heat received by the outside surface of a building wall by the combined effect of convection and radiation?

Test: Solar Refrigeration - Question 3

### The sol-air temperature is equal to the

Test: Solar Refrigeration - Question 4

The sol-air temperature depends on
1. outside air temperature
3. absorptivity of wall
4. convective heat transfer coefficient at outer surface of wall
5. indoor design temperature

Q. Select the correct answer from the codes given below:

Detailed Solution for Test: Solar Refrigeration - Question 4

te: Sol-air temperature
I : Intensity of solar radiation
h: Out-side film coefficient of heat transfer
t0-. Outside air temperature
The temperature te is called the solair temperature and can be considered as an equivalent outside air temperature such that the total heat transferred is the same as due to the combined effect of the incident solar radiation and outside air and the wall temperature difference.

Test: Solar Refrigeration - Question 5

When the outside air is introduced for ventilation purposes, there is a

Detailed Solution for Test: Solar Refrigeration - Question 5

Sensible heat gain due to ΔTbetween fresh air and air in space. Latent heat gain due to humidity.

Test: Solar Refrigeration - Question 6

All of the following sources of heat transfer is responsible for sensible heat gain except

Test: Solar Refrigeration - Question 7

The latent heat gain may occur due to any one or all of the following sources:
1. The heat gain due to condensation of moisture from occupants.
2. The heat gain due to moisture in the outside air entering by infiltration.
3. The heat flowing into the building by conduction through exterior walls, floors, ceilings, doors and windows due to the temperature difference on their sides.
4. The heat gain due to moisture passing directly into the conditioned space through permeable walls or partitions from the outside or from adjoining regions where the water vapour pressure is higher.

Q. Which of the above statements are valid?

Test: Solar Refrigeration - Question 8

The most suitable pair of refrigerant and absorbant combination for solar refrigeration is ​

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