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Free AEE CEM Practice Exam with Questions & Answers | Set: 2

Questions 11

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

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Questions 12

You are using a performance contract to finance the added cost of using more-efficient equipment in the construction of a new building. Which of the following International Performance Measurement and Verification Protocol (IPMVP) options would you use to verify annual energy savings?

Options:
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

Questions 13

A cooling tower delivers 29°C water to a central chilled water plant. The cooling tower is capable of delivering water to the chilled-water plant with a 6°C approach temperature to the ambient wet bulb temperature. Using this information, what type of control strategy would you recommend be added to the cooling tower operation to save additional energy?

Options:
A.

Chilled-water temperature reset

B.

Condenser-water temperature reset

C.

Chiller demand limiting

D.

Static-pressure reset

Questions 14

Which of the following statements regarding refrigerants is NOT correct?

5ELECT THE CORRECT ANSWER

Options:
A.

R-407C is a blended Hydro Fluoro Carbon or near Azeotropic mixture, and can be used as a replacement for R-22 in commercial applications

B.

R-11 and R-12 are Chloro Fluoro Carbons with significant ozone depleting potential

C.

R-1234yf is a Hydro Fluoro Olefin with zero ozone depleting potential, and little global warming potential

D.

R-22 is a Hydro Chloro Carbon with significant ozone depleting potential and significant global warming impact

E.

R-32 and R-134a are Hydro Fluoro Carbons with zero ozone depleting potential, and significant global warming impact

Questions 15

A controller has a signal output that can range from 4 to 20 mA (milli-amperes). The controller regulates the output temperature from a three-way mixing valve from 5°C to 15°C. What is the control gain?

Options:
A.

0.6

B.

0.8

C.

1.2

D.

1.4

E.

1.6

Questions 16

What instrument determines flow rate by measuring pressure differential?

Options:
A.

Psychrometer

B.

Infrared camera

C.

Hot-wire anemometer

D.

Pitot tube

E.

Ultrasonic flow meter

Questions 17

A refrigerant-to-water heat exchanger can be added to air-conditioning equipment to heat water using the waste heat in the vapor compression refrigerant cycle. Where is this type of heat exchanger located in the refrigerant loop?

Options:
A.

After the condenser coil, before the thermal expansion valve

B.

After the expansion valve, before the evaporator coil

C.

After the evaporator coil, before the compressor

D.

After the compressor, before the condenser coil

Questions 18

A 75-kW induction motor operates at 80% partial load and 88% efficiency. A new high-efficiency 75-kW motor can be installed that will operate at 95% efficiency (also at 80% partial load). What is the reduction in electric power demand?

Options:
A.

1 kW

B.

2 kW

C.

4 kW

D.

5 kW

E.

8 kW

Questions 19

Which is the best application for variable-speed drives?

Options:
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

Questions 20

Which of the following best describes a dead band in controls?

Options:
A.

A range around a set point with no change in state even though there is a change in sensor input

B.

A system which changes the output of a controller based on how fast a variable is moving from or to a set point

C.

The delay in response of a system to a controlled change

D.

A value that has been assigned to a controlled variable

E.

The difference between a sensor variable and its set point

Exam Code: CEM
Certification Provider: AEE
Exam Name: Certified Energy Manager (CEM)
Last Update: Jul 20, 2025
Questions: 130

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