CEM AEE Certified Energy Manager (CEM) exact Exam Questions

Certified Energy Manager (CEM)

Last Update 19 hours ago Total Questions : 130

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You'll find that our CEM exam questions frequently feature detailed scenarios and practical problem-solving exercises that directly mirror industry challenges. Engaging with these CEM sample sets allows you to effectively manage your time and pace yourself, giving you the ability to finish any Certified Energy Manager (CEM) practice test comfortably within the allotted time.

Question # 4

The temperature in an unconditioned mechanical room is found to typically be around 23°C warmer than ambient air. If the air intake of an air compressor located in the mechanical room is routed through a nearby wall so that ambient air is fed directly to the air compressor's intake, what impact can be expected on the air compressor's energy requirement?

Increase energy use by 7.6%

Increase energy use by 3.8%

No measureable change in energy use

Decrease energy use by 3.8%

Decrease energy use by 7.6%

Question # 5

What is the definition of lamp life for a fluorescent lamp?

The time at which lamps begin to fail

The time at which 50% of a large sample of lamps have failed

The time at which 70% of a large sample of lamps have failed

The time at which lumen output has reduced by 50%

The time at which lumen output has reduced to 70% of the initial light output

Question # 6

Using the natural gas combustion efficiency tables in your workbook, find the combustion efficiency (based on higher-heating value) of a natural-gas-fired boiler if the excess air level is measured at 31.9% and the stack temperature rise is 187.8°C.

76%

78%

80%

82%

84%

Question # 7

Which of the following statements best describe Demand Control Ventilation (DVC) in Building Automation Systems?

It satisfies indoor ventilation rates by preconditioning outdoor air with the exhaust air to decrease energy cost during cold, warm, or humid weather

It's a prescriptive procedure in which outdoor air intake rates are calculated based on the energy cost method that compares a proposed building design to a base annual energy cost design

It's a building standard for enclosed spaces in which biological, chemical, and physical contaminants are considered to meet thermal comfort requirements

It's an active evaluation of outdoor and indoor space conditions to determine the amount of thermal, mechanical and natural conditioning that is required

Question # 8

A 50-kW induction motor (1,500 rpm synchronous speed) has a nameplate full-load rotational speed of 1,455 rpm. Field measurements show the actual rotational speed is 1,475 rpm. Using the slip method, calculate the partial load factor of the motor.

46%

56%

80%

98%

101%

Question # 9

Exhaust gases from an industrial furnace flow through a heat-recovery steam generator, which generates medium-pressure steam. This steam is used in a steam turbine to generate shaft power driving a fan. Which type of combined heat and power (CHP) cycle does this process describe?

Topping cycle

Bottoming cycle

Combined cycle

This cycle is not a combined heat and power system