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Question 1

Calculate the monthly electric bill for a customer that used 400 kW and 75,000 kwh during one month. Use the following declining block structure for a monthly bill:SELECT THE CORRECT ANSWER

Options :

A : $3,280

B : $4, 580

C : $7,850

D : $9,660

E : $12,500

Answer: D

Question 2

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.

Options :

A : $250,000

B : $556,945

C : $630,300

D : $756,113

Answer: B

Question 3

Insulation has a thermal conductivity of 0.04 Watt/(m-°C). What is the R-value for this insulation when it is 5- cm thick?

Options :

A : 0.8 (m²-°C)/Watt

B : 1.25 (m²-°C)/Watt

C : 2.20 Watt/m²

D : 20 Watt/(m²-°C)

E : 20 (m²-°C)/Watt

Answer: B

Question 4

Which of the following instruments is most useful for tracking long-term boiler performance?

Options :

A : The pressure gauge

B : The exhaust stack temperature sensor

C : The boiler room ambient temperature sensor

D : The drum water level gauge

E : The feedwater temperature sensor

Answer: B

Question 5

Which pump system listed below is most likely the best application for converting to variable-speed drive?

Options :

A : Pump system with parallel rotary lobe pumps in a rebar quenching application with a static head of 80m

B : Pump system with on-off control transferring liquid vertically from a low tank to a higher tank

C : Pump system with bypass control transferring liquid from an intake dam to a process in production

D : Pump system with throttle fully open circulating liquid in a closed loop cooling system

Answer: D