Plant Operator Selection System Test POSS

Question 1

A pump moves 240 gallons of water in 8 minutes. How many gallons does it move in 15 minutes at the same rate?

Accepted Answer

450 gallons

Answer

The rate is 240 ÷ 8 = 30 gallons per minute; 30 × 15 = 450 gallons.

Question 2

Which type of valve is best suited for completely stopping or fully allowing flow, but NOT for throttling?

Accepted Answer

Gate valve

Answer

Gate valves are designed for fully open or fully closed positions and can be damaged by throttling.

Question 3

A gauge reads 35 psi. If 1 psi equals 2.31 feet of water head, what is the equivalent water head in feet?

Accepted Answer

80.85 ft

Answer

35 psi × 2.31 ft/psi = 80.85 feet of water head.

Question 4

A reading passage states that a plant must test cooling water pH every four hours. If a shift is 12 hours long, how many tests must be performed per shift?

Accepted Answer

3

Answer

12 hours ÷ 4 hours per test = 3 tests per shift.

Question 5

On a bar graph showing monthly fuel oil consumption, January shows 8,200 barrels and June shows 3,700 barrels. What is the difference?

Accepted Answer

4,500 barrels

Answer

8,200 − 3,700 = 4,500 barrels difference between January and June.

Plant Operator Selection System Test Practice Test

Plant Operator Selection System Test Practice Test

Plant Operator Selection System Test POSS