Question 1

A high-pressure steam system passes 180°C condensate (saturated liquid) through a steam trap to an atmospherically vented condensate receiver tank. If the steam trap is working properly, how much of the condensate mass can be lost out the vent of the receiver tank in the form of flash steam?

Options :

A : 6%

B : 15%

C : 25%

D : 66%

E : 100%

Answer: C

Question 2

A new lighting system costs $60,000. The new lighting system has a 15-year life and the minimum required rate of return (MARR) is 15%. How much must the new lighting system save to be life-cycle cost effective?

Options :

A : $10,260/year

B : $12,556/year

C : $15,650/year

D : $27,090/year

E : $33,200/year

Answer: B

Question 3

How does an enthalpy-based economizer control operate?

Options :

A : Using a constant mixed air proportion control sequence

B : Comparing the difference in dry-bulb air temperature measurements of the return air and the outdoor air

C : Measuring the outdoor air dry-bulb temperature and relative humidity

D : Using the dry-bulb temperature and relative humidity of both the outdoor-air and return-air

Answer: D

Question 4

Which of the following is NOT included in commissioning documentation?

Options :

A : Original facility and equipment design intent

B : As-built drawings

C : Financing payment structure reportsc

D : Equipment control sequence documentation

E : Equipment operations and maintenance manuals

Answer: C

Question 5

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

Options :

A : Differential

B : Dead band

C : Error or offset

D : Cut off

E : Dead time

Answer: C