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CEM Premium Exam Questions

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Total 130 questions

Certified Energy Manager (CEM) Questions and Answers

Question 25

Which of the following best describes a thermally-light building?

Options:

A.

A building filled with manufacturing and process equipment

B.

A single-story office building where the load on the heating and cooling system is proportional to the outside air (ambient) temperature

C.

A computer data center housing multiple internet server racks

D.

An underground storage facility

Question 26

What is a common cause of poor power quality?

Options:

A.

Natural gas turbine power generation by utilities

B.

Electronic equipment, such as personal computers

C.

Incandescent lighting

D.

Synchronous motors

E.

Partially loaded induction motors

Question 27

A cooling tower is delivering water to a chilled-water plant. The cooling tower outlet temperature has a 6°C approach temperature to the ambient air, wet-bulb temperature. The outside air conditions are 20°C dry bulb, 60% relative humidity. Using the psychrometric chart, at what temperature can the cooling tower deliver water to the chilled-water plant?

Options:

A.

13°C

B.

17°C

C.

21°C

D.

25°C

Question 28

Lighting systems operate with a certain recoverable light loss factor. Control systems with photocell sensor inputs combined with dimming ballasts can be used to regulate dimming levels to maintain a continuous light level in the work space. Which of the following best describes this type of control?

Options:

A.

Closed-loop controller

B.

Open-loop controller

C.

Demand-limiting controller

D.

Two-position controller

Page: 7 / 10
Total 130 questions