Plant Operator Selection System Mathematical Usage Problems 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 Plant Operator Selection System Mathematical Usage Problems flashcards as text
A rectangular settling pond is 200 feet long, 80 feet wide, and 6 feet deep. What is the volume in cubic feet?
Answer: 96,000 cu ft
Volume = 200 × 80 × 6 = 96,000 cubic feet.
A pressure gauge reads 85 psi. If atmospheric pressure is 14.7 psi, what is the absolute pressure?
Answer: 99.7 psi
Absolute pressure = gauge pressure + atmospheric pressure = 85 + 14.7 = 99.7 psi.
A flow meter shows 240 gallons per minute. How many gallons flow through in 2.5 hours?
Answer: 36,000 gallons
240 gpm × 60 min/hr × 2.5 hr = 36,000 gallons.
An operator mixes 15 pounds of chemical A with 45 pounds of chemical B. What percentage of the mixture is chemical A?
Answer: 25%
15 ÷ (15 + 45) = 15 ÷ 60 = 0.25 = 25%.
A temperature reading changes from 68°F to 212°F. What is the change in Celsius? (°C = (°F − 32) × 5/9)
Answer: 80°C
Initial: (68−32)×5/9=20°C; final: (212−32)×5/9=100°C; change=80°C.
A plant produces 3,600 units in an 8-hour shift. If production increases by 15%, how many units are produced per hour in the new rate?
Answer: 517.5 units/hr
3,600 × 1.15 = 4,140 units per shift; 4,140 ÷ 8 = 517.5 units/hr.
A valve allows flow to pass at 65% efficiency. If the pump delivers 400 gallons per minute, how many gallons per minute actually pass through the valve?
Answer: 260 gpm
400 × 0.65 = 260 gpm.
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