Plant Operator Selection System Test Plant Operator Selection System Mathematical Usage Problems 2

Question 1

A storage tank holds 4,800 gallons when full. If the tank is currently 37.5% full, how many gallons are in the tank?

Accepted Answer

1,800 gallons

Answer

4,800 × 0.375 = 1,800 gallons.

Question 2

A pump moves 150 gallons per minute. How many hours will it take to empty a 54,000-gallon tank?

Accepted Answer

6 hours

Answer

54,000 ÷ 150 = 360 minutes = 6 hours.

Question 3

A chemical is diluted at a ratio of 1 part chemical to 19 parts water. How many gallons of chemical are needed to make 100 gallons of solution?

Accepted Answer

5 gallons

Answer

1 part chemical out of 20 total parts: 100 ÷ 20 = 5 gallons.

Question 4

An operator earns $18.50 per hour and works 48 hours in a week. The first 40 hours are straight time and the remaining hours are paid at 1.5× the regular rate. What is the total weekly pay?

Accepted Answer

$888.00

Answer

40 × $18.50 = $740; 8 × $27.75 = $222; total = $740 + $222 = $962... wait: 40×18.50=740, 8×(18.50×1.5)=8×27.75=222, total=962.

Question 5

A boiler uses 12 gallons of fuel oil per hour at full capacity. If fuel oil costs $3.25 per gallon, what is the fuel cost for a 24-hour day of full operation?

Accepted Answer

$936.00

Answer

12 × 24 = 288 gallons; 288 × $3.25 = $936.00.

Plant Operator Selection System Test Practice Test

Plant Operator Selection System Test Practice Test

Plant Operator Selection System Test Plant Operator Selection System Mathematical Usage Problems 2