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 gauge reads 3.75 on a scale of 0 to 10. What percentage of maximum is the reading?
Answer: 37.5%
3.75 ÷ 10 × 100 = 37.5%.
A machine uses 3.2 gallons of oil per day. How many gallons are needed for a 30-day month?
Answer: 96 gallons
3.2 × 30 = 96 gallons.
A temperature drops from 212°F to 98.6°F. By how many degrees did it drop?
Answer: 113.4°F
212 − 98.6 = 113.4°F.
An operator works 6.5-hour shifts and earns $22 per hour. What is the gross pay for one shift?
Answer: $143.00
$22 × 6.5 = $143.00.
A chemical must be diluted at a 1:9 ratio (chemical to water). How many ml of chemical are needed for 900 ml of final solution?
Answer: 90 ml
Chemical = 1/10 of total; 900 ÷ 10 = 90 ml.
A conveyor belt runs at 2.4 meters per second. How many meters does it travel in 5 minutes?
Answer: 720 meters
5 minutes = 300 seconds; 300 × 2.4 = 720 meters.
If a valve is 7/8 open and needs to be reduced to 1/2 open, by what fraction must it be closed?
Answer: 3/8
7/8 − 1/2 = 7/8 − 4/8 = 3/8.
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