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CEM Exam Dumps - Certified Energy Manager (CEM)

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Question # 9

If outside air has a temperature of 30°C dry bulb and 20°C wet bulb, what is the dew point temperature?

A.

15°C

B.

20°C

C.

25°C

D.

30°C

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Question # 10

Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings in a project that upgraded lighting in a large manufacturing plant?

A.

Option A - Retrofit isolation: key parameter measurement

B.

Option B - Retrofit isolation: all parameter measurement

C.

Option C - Whole facility measurement

D.

Option D - Calibrated simulation

E.

Option E - Stipulated savings

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Question # 11

A facility owner is considering installing a new chiller. The installed project cost will be $300,000. The annual savings from the energy-saving project will be $45,000 for the 20-year life of the chiller. If an energy-service company requires a minimum 20% return on investment (pre-tax), will the energy-service company agree to finance this project?

A.

Yes

B.

No

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Question # 12

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?

A.

Closed-loop controller

B.

Open-loop controller

C.

Demand-limiting controller

D.

Two-position controller

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Question # 13

Which heat recovery device listed below can be used to preheat boiler make-up water using the heat energy from skimming blowdown?

A.

Shell and tube heat exchanger

B.

Regenerative recouperator

C.

Desiccant heat wheel

D.

Heat pipe

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Question # 14

Air is heated from 10°C (dry bulb temperature) and 80% relative humidity to 32°C (dry bulb temperature). What is the new relative humidity?

A.

20%

B.

30%

C.

40%

D.

60%

E.

80%

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Question # 15

Which is the best application for variable-speed drives?

A.

Reciprocating air compressor

B.

Waste-water sewer lift pump

C.

Centrifugal fan motor in a variable-air volume air-conditioning system

D.

Centrifugal fan motor in a multi-zone air conditioning system

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Question # 16

Insulation has a thermal conductivity of 0.04 Watt/(m-°C). What is the R-value for this insulation when it is 5-cm thick?

A.

0.8 (m²-°C)/Watt

B.

1.25 (m²-°C)/Watt

C.

2.20 Watt/m²

D.

20 Watt/(m²-°C)

E.

20 (m²-°C)/Watt

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