CEM無料問題集「AEE Certified Energy Manager (CEM)」

質問 1

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.

（A）98%

（B）80%

（C）56%

（D）101%

（E）46%

正解：B 解答を投票する

質問 2

What term describes the difference between the control signal value and the set point?

（A）Cut off

（B）Differential

（C）Dead time

（D）Dead band

（E）Error or offset

正解：E 解答を投票する

質問 3

How can commissioning reduce the life-cycle cost to owners and operators?

（A）Improve the performance of energy systems

（B）Improve the effectiveness of operations and maintenance

（C）All of the above

（D）Reduce the cost of change orders during construction

（E）Improve the satisfaction of building occupants

正解：C 解答を投票する

質問 4

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）2,250 CDD/yr

（B）1,845 CDD/yr

（C）2,975 CDD/yr

（D）1,955 CDD/yr

（E）2,555 CDD/yr

正解：C 解答を投票する

質問 5

What is the best type of heat exchanger to recover and transfer latent heat energy from one air stream to another?

（A）Heat pipe

（B）Ceramic recuperator

（C）Shell and tube

（D）Run-around system

（E）Desiccant heat wheel

正解：E 解答を投票する

質問 6

Which type of lighting control technique operates in "manual on" and "auto-off mode, and can be used in situations where there is brief occupancy that do not need lights on?

（A）Photocell control

（B）PIR/Microphonics dual technology

（C）Microphonics technology

（D）Occupancy sensor

（E）Vacancy sensor

正解：E 解答を投票する

質問 7

What is the purpose of monitoring energy consumption?
SELECT THE CORRECT ANSWER

（A）To establish when and why there is a deviation in energy consumption patterns

（B）To support analysis of energy information

（C）To establish a basis of management control

（D）All of the above

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

A piece of equipment costs $250,000 to buy and install. The annual operating cost for the equipment is
$50,000 per year. The equipment will last 15 years. After 15 years, the equipment will have no net salvage value. The annual interest rate is 10%. What is the present value of the life-cycle cost to own and operate the equipment? Use end-of-year annual cash flow analysis.

（A）$756,113

（B）$250,000

（C）$556,945

（D）$630,300

正解：C 解答を投票する

質問 9

A steam trap with a 6-mm orifice in an 0.8-MPa steam system has failed open. The steam system is pressurized8.760 hours/yr. The steam cost is $15.00 /GJ. Using thetable below, what is the annualcost of the vented steam through the failed steam trap? ignore any condensate return issues.

[The question from the previous image, which was about calculating the annual cost of heat loss through a wall, but had a discrepancy between the calculated cost and the provided answer choices]

（A）$5,000/yr

（B）$20,000/yr

（C）$10,000/yr

（D）$40,000/yr

（E）$30,000/yr

正解：E 解答を投票する

質問 10

Which of the following is NOT a renewable-energy resource?
SELECT THE CORRECT ANSWER

（A）Saw grass

（B）Geothermal heat

（C）Crop residue

（D）Shale gas

（E）Ocean waves

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

CEM 無料問題集「AEE Certified Energy Manager (CEM)」

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