IBEW Numerical Reasoning 2

Question 1

A cable tray holds 48 cables. If 3/8 of the tray is already filled, how many more cables can be added?

Accepted Answer

30

Answer

3/8 of 48 = 18 cables filled. 48 - 18 = 30 remaining spaces.

Question 2

An electrician earns $34.50 per hour and works 8.5 hours. What is the total pay before deductions?

Accepted Answer

$293.25

Answer

Total = $34.50 × 8.5 = $293.25.

Question 3

If a conduit run is 120 feet long and must be supported every 8 feet, how many supports are needed?

Accepted Answer

15

Answer

120 ÷ 8 = 15 supports (one at each 8-foot interval, plus the starting point = 16, but typically the count is the number of intervals = 15).

Question 4

A wire spool contains 500 feet of wire. After using 137.5 feet, what percentage of wire remains?

Accepted Answer

72.5%

Answer

Wire remaining: 500 - 137.5 = 362.5 feet. Percentage remaining = (362.5/500) × 100 = 72.5%.

Question 5

Three electricians can wire a building in 12 days. How many days would it take 4 electricians working at the same rate?

Accepted Answer

9

Answer

Total work = 3 × 12 = 36 person-days. With 4 workers: 36 ÷ 4 = 9 days.

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