IBEW Ratio and Proportion 2

Question 1

If mixing a solution requires a 3:1 ratio of water to chemical concentrate, how many gallons of concentrate are needed for 12 gallons of total solution?

Accepted Answer

3 gallons

Answer

2 gallons

Answer

4 gallons

Answer

6 gallons

Question 2

A motor runs at 1,800 RPM and is connected by a belt to a pulley with a 3:1 drive ratio. What is the output RPM of the driven pulley?

Accepted Answer

600 RPM

Answer

400 RPM

Answer

500 RPM

Answer

900 RPM

Question 3

Two gears mesh together. The drive gear has 48 teeth and the driven gear has 16 teeth. If the drive gear rotates at 200 RPM, how fast does the driven gear rotate?

Accepted Answer

600 RPM

Answer

300 RPM

Answer

400 RPM

Answer

800 RPM

Question 4

An electrician earns $28 per hour and works 8 hours per day. At the same daily rate, how much does he earn in 5 days?

Accepted Answer

$1,120

Answer

$960

Answer

$1,020

Answer

$1,240

Question 5

If a 3/4-inch conduit can hold 12 wires, how many wires can a 1.5-inch conduit (twice the diameter) hold, assuming capacity scales with the square of the diameter?

Accepted Answer

48

Answer

24

Answer

36

Answer

60

Question 6

A job requires the ratio of material cost to labor cost to be 2:3. If the total budget is $5,000, how much is allocated for labor?

Accepted Answer

$3,000

Answer

$1,500

Answer

$2,000

Answer

$2,500

Question 7

If 6 workers complete a task in 8 days, how many days will it take 4 workers to complete the same task?

Accepted Answer

12 days

Answer

10 days

Answer

11 days

Answer

14 days