Questions and answers for exam Preparation

MCQs

Total Questions : 207 | Page 7 of 21 pages

Question 61. What is the metal sheet absorber surrounded with in an evacuated flat plate collector?

Low volume inside flat envelope
Low vacuum inside curved envelope
High vacuum inside flat envelope
Low vacuum inside thick curved envelope

Discuss Question

Answer: Option C. -> High vacuum inside flat envelope
Answer: (c).High vacuum inside flat envelope

Question 62. Which of the following organisations developed first high vacuum insulation?

NASA
IIT
Stanford
CERN

Discuss Question

Answer: Option D. -> CERN
Answer: (d).CERN

Question 63. Why does an evacuated flat plate collector require a glass-metal seal?

To join the glass plate to the rest of metal envelope
To join the glass plate to a part of metal envelope
To disconnect the glass plate to the rest of plastic envelope
To disconnect the glass plate to the rest of metal envelope

Discuss Question

Answer: Option A. -> To join the glass plate to the rest of metal envelope
Answer: (a).To join the glass plate to the rest of metal envelope

Question 64. Which of the following provides highest energy conversion efficiency in non-concentrating solar collectors?

Flat plate collectors
Evacuated flat plate collectors
Evacuated-tube collectors
Parabolic collectors

Discuss Question

Answer: Option B. -> Evacuated flat plate collectors
Answer: (b).Evacuated flat plate collectors

Question 65. Which of the following pumps is used in an evacuated-tube solar collector?

Non-evaporable getter
Flash getter pump
Heat pump
Water pump

Discuss Question

Answer: Option B. -> Flash getter pump
Answer: (b).Flash getter pump

Question 66. Which of the following is an example of direct solar water heating system?

Pressurised antifreeze system
Pumped systems to circulate transfer fluid
Convection heat storage system
Drainback system

Discuss Question

Answer: Option C. -> Convection heat storage system
Answer: (c).Convection heat storage system

Question 67. How is the heat transfer fluid (HTF) heated in bubble pump systems?

By subjecting the closed HTF circuit to high pressure
By subjecting the closed HTF circuit to high pressure and by increasing the volume
By subjecting the closed HTF circuit to low pressure and by decreasing the volume
By subjecting the closed HTF circuit to low pressure

Discuss Question

Answer: Option D. -> By subjecting the closed HTF circuit to low pressure
Answer: (d).By subjecting the closed HTF circuit to low pressure

Question 68. Batch collectors reduce heat loss by thermally insulating the storage tank.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 69. Overheat protection is done by passing hot water through collector during night.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 70. What is solar heating and cooling?

Use solar energy to regulate the internal temperature of a given space
Use solar energy to regulate the temperature of environment
Use solar energy to monotonically increase the internal temperature of a given space
Use solar energy to monotonically decrease the temperature of a given space

Discuss Question

Answer: Option A. -> Use solar energy to regulate the internal temperature of a given space
Answer: (a).Use solar energy to regulate the internal temperature of a given space