WorkKeys Applied Technology 2

Question 1

What is the primary purpose of a fuse in an electrical circuit?

Accepted Answer

To protect against overcurrent and prevent fires

Answer

A fuse contains a metal strip that melts and breaks the circuit when current exceeds a safe level, protecting wiring and devices.

Question 2

Direct current (DC) differs from alternating current (AC) in that DC:

Accepted Answer

Flows in one direction only

Answer

Direct current flows consistently in one direction, whereas alternating current periodically reverses direction at a set frequency.

Question 3

A machine has a mechanical advantage of 5 and requires an input force of 40 lbs. What is the output force?

Accepted Answer

200 lbs

Answer

Output force equals mechanical advantage multiplied by input force: 5 × 40 = 200 lbs.

Question 4

According to the second law of thermodynamics, heat naturally flows:

Accepted Answer

From a hot region to a cold region

Answer

Heat spontaneously transfers from higher-temperature areas to lower-temperature areas until thermal equilibrium is reached.

Question 5

A compound gear train consists of three gear pairs with individual ratios of 2:1, 3:1, and 4:1. What is the total gear reduction?

Accepted Answer

24:1

Answer

In a compound gear train, total gear ratio is found by multiplying all individual ratios: 2 × 3 × 4 = 24:1.

WorkKeys Practice Test