Question 6031 of 223 · California Water Treatment Operator Exam
The water horsepower of a pump is 25 hp and the pump efficiency is 80 percent. What is the brake horsepower?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 6031
- A: 31.3 hp
Explanation
Brake hp = water hp / efficiency = 25 / 0.80 = 31.3. Multiplying gives 20, which is less than the water horsepower and cannot be correct.
More questions: Treatment Exam Math
- 6032A pump requires 31.25 brake horsepower and the motor is 90 percent efficient. What motor horsepower is required?
- 6033A 40 hp motor runs 24 hours at an electricity cost of $0.12 per kWh. What is the approximate daily cost? (1 hp = 0.746 kW)
- 6034Water flows at 3 ft/sec through an 8-inch pipe. What is the flow in cubic feet per second?
- 6035A water meter reads 1,245,300 gallons on Monday and 1,578,300 gallons three days later. What is the average daily flow?
- 6036How long will it take to fill a 120,000 gallon tank at 500 gpm?
- 6037A reservoir holds 600,000 gallons. Inflow is 300 gpm and demand is 1,100 gpm. How many hours can the supply last?