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AEE Certified Energy Manager (CEM) Sample Questions:

1. A facility has the thermal cooling load profile shown in the table below. The utility rate tariff has an on-peak time-of-use billing period that begins at 10:00 a.m. and ends at 7:00p.m. Calculate the storage capacity required for a load-shifting operating strategy, to make sure that no thermal cooling Is generated by the chiller during the on-peak utility rate period.

[Question from the previous image, which was about storage capacity for load shifting, but the table was missing]

A) 72 GJ
B) 66 GJ
C) 84 GJ
D) 48 GJ

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

A) A range around a set point with no change in state even though there is a change in sensor input
B) The delay in response of a system to a controlled change
C) A value that has been assigned to a controlled variable
D) A system which changes the output of a controller based on how fast a variable is moving from or to a set point
E) The difference between a sensor variable and its set point

3. For general indoor residential lighting applications, which light source can provide the most appropriate illumination with the highest efficacy?

A) Mercury vapor (MV)
B) Low-pressure sodium (LPS)
C) Incandescent
D) Compact fluorescent (CFL)
E) Light-emitting diode (LED)

4. What is a common cause of poor power quality?

A) Synchronous motors
B) Natural gas turbine power generation by utilities
C) Incandescent lighting
D) Electronic equipment, such as personal computers
E) Partially loaded induction motors

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

A) The time at which lumen output has reduced by 50%
B) The time at which lumen output has reduced to 70% of the initial light output
C) The time at which lamps begin to fail
D) The time at which 50% of a large sample of lamps have failed
E) The time at which 70% of a large sample of lamps have failed

Solutions: