Plant Operator Selection System Test POSS: Mathematical Usage 4 — Questions and Answers
Question 1: A gauge reads 3.75 on a scale of 0 to 10. What percentage of maximum is the reading?
- 30.5%
- 35.5%
- 37.5% (Correct answer)
- 40.0%
Correct answer: 37.5%
3.75 ÷ 10 × 100 = 37.5%.
Question 2: A machine uses 3.2 gallons of oil per day. How many gallons are needed for a 30-day month?
- 88 gallons
- 92 gallons
- 96 gallons (Correct answer)
- 100 gallons
Correct answer: 96 gallons
3.2 × 30 = 96 gallons.
Question 3: A temperature drops from 212°F to 98.6°F. By how many degrees did it drop?
- 107.4°F
- 111.4°F
- 113.4°F (Correct answer)
- 115.4°F
Correct answer: 113.4°F
212 − 98.6 = 113.4°F.
Question 4: An operator works 6.5-hour shifts and earns $22 per hour. What is the gross pay for one shift?
- $132.00
- $138.00
- $143.00 (Correct answer)
- $148.00
Correct answer: $143.00
$22 × 6.5 = $143.00.
Question 5: 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?
- 80 ml
- 90 ml (Correct answer)
- 95 ml
- 100 ml
Correct answer: 90 ml
Chemical = 1/10 of total; 900 ÷ 10 = 90 ml.
Question 6: A conveyor belt runs at 2.4 meters per second. How many meters does it travel in 5 minutes?
- 680 meters
- 700 meters
- 720 meters (Correct answer)
- 740 meters
Correct answer: 720 meters
5 minutes = 300 seconds; 300 × 2.4 = 720 meters.
Question 7: If a valve is 7/8 open and needs to be reduced to 1/2 open, by what fraction must it be closed?
- 1/4
- 3/8 (Correct answer)
- 5/16
- 1/8
Correct answer: 3/8
7/8 − 1/2 = 7/8 − 4/8 = 3/8.
Plant Operator Selection System Test POSS: Mathematical Usage 4
A gauge reads 3.75 on a scale of 0 to 10.
What percentage of maximum is the reading?