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AEE Certified Energy Manager (CEM) Sample Questions (Q119-Q124):

NEW QUESTION # 119
A heat pump water heater has an annual average coefficient of performance (COP) of 2.1 and heats water from 15°C to 50°C. Hot water use is 100 liters per day, 365 days/yr. The electricity cost is $0.10/kWh. What is the annual water heating cost? (The specific heat of water (C) is 4.2 kJ/kg-°C.)

A. $64.66/year
B. $52.20/year
C. $44.88/year
D. $88.29/year
E. $70.97/year

Answer: A

NEW QUESTION # 120
An air conditioning unit cools make-up air from 25°C (dry bulb temperature) and 50% relative humidity down to 13°C. What type of heat has been removed from the air?

A. Sensible heat
B. Both sensible and latent heat
C. No heat energy has been removed
D. Latent heat

Answer: B

NEW QUESTION # 121
What instrument determines flow rate by measuring pressure differential?

A. Pitot tube
B. Hot-wire anemometer
C. Psychrometer
D. Infrared camera
E. Ultrasonic flow meter

Answer: A

Explanation:
APitot tubemeasuresflow rateby determining thepressure differentialin a fluid.
Why is a Pitot Tube the Correct Answer?
* It measuresdynamic pressureandstatic pressurein a moving fluid.
* Using Bernoulli's equation, it calculatesvelocityandflow rate.
Analysis of Other Options:
* Psychrometer (A):Measures humidity, not flow rate.
* Infrared camera (B):Detects temperature differences, not pressure.
* Hot-wire anemometer (C):Measures air velocity using heat dissipation, but not pressure differential.
* Ultrasonic flow meter (E):Measures flow using sound waves, not pressure.
Thus, the correct answer isD. Pitot tube.

NEW QUESTION # 122
Which of the following is a closed-loop controller?

A. Time clock schedule controller
B. Accelerator pedal in an automobile
C. Manual dimmer for a light switch
D. Thermostat for an air conditioning unit

Answer: D

NEW QUESTION # 123
Using a degree-day base of 18°C, calculate the number of cooling degree days (CDD) if the outside temperature is a uniform 25°C throughout the year (365 days/year).

A. 2,975 CDD/yr
B. 1,955 CDD/yr
C. 2,250 CDD/yr
D. 2,555 CDD/yr
E. 1,845 CDD/yr

Answer: A

NEW QUESTION # 124
......

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CEM Online Test & CEM Download Demo

CEM Online Test - Pass Guaranteed Quiz First-grade AEE CEM Download Demo

AEE Certified Energy Manager (CEM) Sample Questions (Q119-Q124):

CEM Exam Questions and Answers Are of High Quality - Itcertmaster

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