FREE Certified Energy Manager Motors and HVAC Questions and Answers

Question 1

The US industries and structures with the highest installation rates of electric motors are:

Accepted Answer

AC Induction

Answer

Direct Generation

Answer

Cogeneration

Answer

DC

Answer

AC Synchronous

Question 2

Pick the most accurate estimate of electric motor efficiency (in percent) when motors are appropriately loaded in the absence of additional data:

Accepted Answer

90

Answer

100

Answer

33

Answer

50

Answer

72

Question 3

What are HP savings if a motor has a Variable Speed Drive (VSD) fitted that slows down a 200 HP motor by 20%?

Accepted Answer

97.6 HP

Answer

160 HP

Answer

102 HP

Answer

40 HP

Answer

None of the above

Question 4

There are roughly how many cooling degree days in a calendar year if the outside temperature stays constant at 75°F:

Accepted Answer

3,650 CDD

Answer

1,825 CDD

Answer

8,760 CDD

Answer

0 CDD

Question 5

The COP of a 250-ton chiller is 4.2. What is the chiller's load (in kW) while it is operating at full capacity?

Accepted Answer

209 kW

Answer

841 kW

Answer

Cannot be determined

Answer

1050 kW

Question 6

At a flow rate of 6750 cubic feet per minute, air with a relative humidity of 50% and a dry bulb temperature of 69°F is heated to 90°F. How much BTU per hour is needed for this process? Don't consider duct losses.

Accepted Answer

153 kBtu/year

Answer

73,857 Btu/year

Answer

637,875 Btu/year

Answer

Cannot be determined

Question 7

How much can you afford to spend for the waste heat exchanger (total installation cost) if your company's MARR is 30% and it saves $1,000,000 year and lasts for 7 years?

Accepted Answer

$2,802,100

Answer

$3,300,000

Answer

$8,172,200

Answer

$356,900

Answer

None of the above