Plant Operator Selection System Test POSS: Mathematical Usage 2 — Questions and Answers
Question 1: A pump moves 240 gallons of water in 8 hours. How many gallons does it move per hour?
- 28 gallons
- 30 gallons (Correct answer)
- 32 gallons
- 36 gallons
Correct answer: 30 gallons
240 ÷ 8 = 30 gallons per hour.
Question 2: A tank holds 5,000 liters. It is currently 35% full. How many liters are in the tank?
- 1,500 liters
- 1,650 liters
- 1,750 liters (Correct answer)
- 2,000 liters
Correct answer: 1,750 liters
5,000 × 0.35 = 1,750 liters.
Question 3: If a valve is opened 3/8 of the way and then opened an additional 1/4, what fraction of the way is it open?
- 4/12
- 5/8 (Correct answer)
- 7/12
- 1/2
Correct answer: 5/8
3/8 + 1/4 = 3/8 + 2/8 = 5/8.
Question 4: A worker earns $18.50 per hour and works 9 hours in one shift. What is the total pay for that shift?
- $157.50
- $163.50
- $166.50 (Correct answer)
- $171.00
Correct answer: $166.50
$18.50 × 9 = $166.50.
Question 5: A container is 72 inches tall. How tall is it in feet?
- 5 feet
- 5.5 feet
- 6 feet (Correct answer)
- 6.5 feet
Correct answer: 6 feet
72 ÷ 12 = 6 feet.
Question 6: A chemical solution requires 4 parts water to every 1 part concentrate. How many liters of water are needed to make 25 liters of solution?
- 16 liters
- 18 liters
- 20 liters (Correct answer)
- 22 liters
Correct answer: 20 liters
Water ratio = 4/5 of total, so 4/5 × 25 = 20 liters.
Question 7: A pipe leaks at a rate of 0.4 gallons per minute. How many gallons will leak in 2.5 hours?
- 48 gallons
- 56 gallons
- 60 gallons (Correct answer)
- 64 gallons
Correct answer: 60 gallons
2.5 hours = 150 minutes; 150 × 0.4 = 60 gallons.
Plant Operator Selection System Test POSS: Mathematical Usage 2
A pump moves 240 gallons of water in 8 hours.
How many gallons does it move per hour?