Plant Operator Selection System Test POSS: Mathematical Usage 3 — Questions and Answers
Question 1: A storage tank has a volume of 800 cubic feet. If 1 cubic foot holds approximately 7.48 gallons, about how many gallons does the tank hold?
- 5,584 gallons
- 5,784 gallons
- 5,984 gallons (Correct answer)
- 6,184 gallons
Correct answer: 5,984 gallons
800 × 7.48 = 5,984 gallons.
Question 2: A plant runs for 16 hours a day, 5 days a week. How many hours does it operate in a 4-week month?
- 280 hours
- 300 hours
- 320 hours (Correct answer)
- 340 hours
Correct answer: 320 hours
16 × 5 × 4 = 320 hours per month.
Question 3: If pressure reads 45 PSI and must be reduced by 40%, what is the new reading?
- 25 PSI
- 27 PSI (Correct answer)
- 29 PSI
- 31 PSI
Correct answer: 27 PSI
45 × 0.40 = 18; 45 − 18 = 27 PSI.
Question 4: Three workers split a bonus of $1,245 equally. How much does each receive?
- $405
- $415 (Correct answer)
- $420
- $425
Correct answer: $415
$1,245 ÷ 3 = $415 each.
Question 5: A pipe delivers 12.5 gallons per minute. How long will it take to fill a 500-gallon tank?
- 35 minutes
- 40 minutes (Correct answer)
- 45 minutes
- 50 minutes
Correct answer: 40 minutes
500 ÷ 12.5 = 40 minutes.
Question 6: A meter reads 2,376 kWh at the start of the month and 3,015 kWh at the end. How many kWh were used?
- 629 kWh
- 639 kWh (Correct answer)
- 649 kWh
- 659 kWh
Correct answer: 639 kWh
3,015 − 2,376 = 639 kWh.
Question 7: A rectangular basin measures 50 feet long, 20 feet wide, and 8 feet deep. What is its volume in cubic feet?
- 7,000 cubic feet
- 7,500 cubic feet
- 8,000 cubic feet (Correct answer)
- 8,500 cubic feet
Correct answer: 8,000 cubic feet
50 × 20 × 8 = 8,000 cubic feet.
Plant Operator Selection System Test POSS: Mathematical Usage 3
A storage tank has a volume of 800 cubic feet.
If 1 cubic foot holds approximately 7.48 gallons, about how many gallons does the tank hold?