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 plant produces 4,800 units per day. If production increases by 12.5%, how many units will be produced per day?
Answer: 5,400 units
4,800 × 1.125 = 5,400 units.
A fuel tank is 9/10 full and holds 450 gallons when full. How many gallons are currently in the tank?
Answer: 405 gallons
450 × 9/10 = 405 gallons.
Equipment costs $3,600 and depreciates evenly over 5 years. What is the annual depreciation?
Answer: $720
$3,600 ÷ 5 = $720 per year.
A flow rate is measured at 15,000 liters per hour. What is the flow rate in liters per minute?
Answer: 250 L/min
15,000 ÷ 60 = 250 liters per minute.
If the average of four pressure readings is 38 PSI, and three of the readings are 35, 40, and 42 PSI, what is the fourth reading?
Answer: 35 PSI
Total = 38 × 4 = 152; 152 − 35 − 40 − 42 = 35 PSI.
A worker uses 2/3 of a 15-gallon drum of solvent. How many gallons remain?
Answer: 5 gallons
Used = 2/3 × 15 = 10; remaining = 15 − 10 = 5 gallons.
A pump runs for 45 minutes and moves 270 gallons. What is the flow rate in gallons per hour?
Answer: 360 gph
270 ÷ 45 = 6 gal/min; 6 × 60 = 360 gallons per hour.
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