Plant Operator Selection System Test POSS: Mathematical Usage 5 — Questions and Answers
Question 1: A plant produces 4,800 units per day. If production increases by 12.5%, how many units will be produced per day?
- 5,200 units
- 5,400 units (Correct answer)
- 5,600 units
- 5,800 units
Correct answer: 5,400 units
4,800 × 1.125 = 5,400 units.
Question 2: A fuel tank is 9/10 full and holds 450 gallons when full. How many gallons are currently in the tank?
- 390 gallons
- 400 gallons
- 405 gallons (Correct answer)
- 415 gallons
Correct answer: 405 gallons
450 × 9/10 = 405 gallons.
Question 3: Equipment costs $3,600 and depreciates evenly over 5 years. What is the annual depreciation?
- $680
- $700
- $720 (Correct answer)
- $740
Correct answer: $720
$3,600 ÷ 5 = $720 per year.
Question 4: A flow rate is measured at 15,000 liters per hour. What is the flow rate in liters per minute?
- 200 L/min
- 225 L/min
- 250 L/min (Correct answer)
- 275 L/min
Correct answer: 250 L/min
15,000 ÷ 60 = 250 liters per minute.
Question 5: 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?
- 35 PSI (Correct answer)
- 36 PSI
- 37 PSI
- 39 PSI
Correct answer: 35 PSI
Total = 38 × 4 = 152; 152 − 35 − 40 − 42 = 35 PSI.
Question 6: A worker uses 2/3 of a 15-gallon drum of solvent. How many gallons remain?
- 4 gallons
- 5 gallons (Correct answer)
- 6 gallons
- 7 gallons
Correct answer: 5 gallons
Used = 2/3 × 15 = 10; remaining = 15 − 10 = 5 gallons.
Question 7: A pump runs for 45 minutes and moves 270 gallons. What is the flow rate in gallons per hour?
- 320 gph
- 340 gph
- 360 gph (Correct answer)
- 380 gph
Correct answer: 360 gph
270 ÷ 45 = 6 gal/min; 6 × 60 = 360 gallons per hour.
Plant Operator Selection System Test POSS: Mathematical Usage 5
A plant produces 4,800 units per day.
If production increases by 12.5%, how many units will be produced per day?