FREE IBEW Aptitude Test Number Sequences and Functions Questions and Answers

Question 1

An electrical signal's voltage is modeled by the function V(t) = 2t² - 8. At what positive value of t does the voltage equal 42?

Accepted Answer

t = 5

Answer

t = 25

Answer

t = 4

Answer

t = 17

Question 2

What is the next number in the following sequence: 3, 7, 16, 32, 57, ...?

Accepted Answer

93

Answer

81

Answer

91

Answer

78

Question 3

The function f(x) represents the number of feet of wire an apprentice can install in 'x' hours. If f(x) = 50x - 5, which of the following statements is true?

Accepted Answer

After 4 hours, the apprentice will have installed 195 feet of wire.

Answer

The apprentice installs wire at a rate of 45 feet per hour.

Answer

In 3 hours, the apprentice will have installed exactly 150 feet of wire.

Answer

The function has a starting value of -5, which represents a setup time.

Question 4

A wiring project's progress can be tracked by the sequence: 5, 12, 19, 26, 33. This represents the number of circuits completed each day. Which function, C(d), correctly models the number of circuits completed on day 'd'?

Accepted Answer

C(d) = 7d - 2

Answer

C(d) = 5d + 7

Answer

C(d) = d + 7

Answer

C(d) = 5d

Question 5

Identify the pattern and find the missing number in the sequence: 81, 27, __, 3, 1.

Accepted Answer

9

Answer

18

Answer

12

Answer

6

Question 6

Given the function g(x) = (x + 4) / (x - 2), what is the value of g(8)?

Accepted Answer

2

Answer

1

Answer

Undefined

Answer

12

An electrical signal's voltage is modeled by the function V(t) = 2t² - 8.At what positive value of t does the voltage equal 42?

An electrical signal's voltage is modeled by the function V(t) = 2t² - 8.
At what positive value of t does the voltage equal 42?