POSS: Mathematical Usage Flashcards
7 cards from real Plant Operator Selection System Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 POSS: Mathematical Usage flashcards as text
A pump moves 240 gallons of water in 8 hours. How many gallons does it move per hour?
Answer: 30 gallons
240 ÷ 8 = 30 gallons per hour.
A tank holds 5,000 liters. It is currently 35% full. How many liters are in the tank?
Answer: 1,750 liters
5,000 × 0.35 = 1,750 liters.
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?
Answer: 5/8
3/8 + 1/4 = 3/8 + 2/8 = 5/8.
A worker earns $18.50 per hour and works 9 hours in one shift. What is the total pay for that shift?
Answer: $166.50
$18.50 × 9 = $166.50.
A container is 72 inches tall. How tall is it in feet?
Answer: 6 feet
72 ÷ 12 = 6 feet.
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?
Answer: 20 liters
Water ratio = 4/5 of total, so 4/5 × 25 = 20 liters.
A pipe leaks at a rate of 0.4 gallons per minute. How many gallons will leak in 2.5 hours?
Answer: 60 gallons
2.5 hours = 150 minutes; 150 × 0.4 = 60 gallons.
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