IBEW Ratio and Proportion

Question 1

A wire crew installs 240 feet of conduit in 6 hours. At the same rate, how many feet will they install in 9 hours?

Accepted Answer

360 feet

Answer

300 feet

Answer

320 feet

Answer

400 feet

Question 2

If 4 electricians can wire 3 apartments in 2 days, how many apartments can 8 electricians wire in 2 days?

Accepted Answer

6

Answer

4

Answer

5

Answer

8

Question 3

The ratio of copper wire to aluminum wire used on a job is 5:3. If 40 pounds of copper wire is used, how many pounds of aluminum wire are needed?

Accepted Answer

24 pounds

Answer

18 pounds

Answer

20 pounds

Answer

30 pounds

Question 4

A blueprint is drawn at a scale of 1 inch = 8 feet. If a room measures 3.5 inches on the blueprint, what is the actual length of the room?

Accepted Answer

28 feet

Answer

24 feet

Answer

26 feet

Answer

32 feet

Question 5

On a job site, the ratio of journeymen to apprentices is 2:5. If there are 14 journeymen, how many apprentices are on the site?

Accepted Answer

35

Answer

28

Answer

30

Answer

40

Question 6

If a 12-volt battery is connected to a circuit with a current of 3 amps, and the voltage is increased proportionally to produce 5 amps, what is the new voltage?

Accepted Answer

20 volts

Answer

15 volts

Answer

16 volts

Answer

24 volts

Question 7

A spool of wire contains 500 feet and weighs 15 pounds. How much does a 200-foot section of the same wire weigh?

Accepted Answer

6 pounds

Answer

5 pounds

Answer

7 pounds

Answer

8 pounds