Question 1

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 2

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 3

A 55-kW motor at full load is used to drive a pump that generates 50 meters of head while pumping water at a rate of 5,000 liters per minute. Calculate the pump efficiency.

Options :

A : 58%

B : 62%

C : 74%

D : 88%

Answer: C

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

In a warehouse, lights are mounted 4 meters above the floor. This provides an average light level of 150 lux. To increase the light level without installing more lights or higher Wattage lights, you lower the light fixtures with pendants so that the lights are located 3.25 meters above the floor. Calculate the new average light level on the floor.

Options :

A : 150 lux

B : 166 lux

C : 176 lux

D : 227 lux

E : 276 lux

Answer: C