Psychometric Test Psychometric Test Mechanical Reasoning

Question 1

Two gears are meshed together. Gear A has 20 teeth and Gear B has 40 teeth. If Gear A rotates at 100 RPM, at what speed does Gear B rotate?

Accepted Answer

50 RPM

Answer

Gear speed is inversely proportional to tooth count: B spins at 20/40 × 100 = 50 RPM.

Question 2

A lever has a fulcrum in the middle. A 10 kg weight is placed 2 m to the left. To balance it, a 5 kg weight must be placed how far to the right?

Accepted Answer

4 m

Answer

Torque balance: 10 kg × 2 m = 5 kg × d, so d = 4 m.

Question 3

Water flows through a pipe that narrows from a 4 cm diameter to a 2 cm diameter. What happens to the water's flow speed?

Accepted Answer

It quadruples

Answer

The cross-sectional area decreases by a factor of 4 (radius halved), so by continuity, speed quadruples.

Question 4

A ball is thrown horizontally from a cliff. Ignoring air resistance, which force acts on the ball during flight?

Accepted Answer

Only gravity

Answer

After release, only gravity acts on the ball; there is no horizontal force to maintain (Newton's first law).

Question 5

A pulley system has one fixed and one movable pulley. Approximately how much effort is needed to lift a 100 kg load?

Accepted Answer

50 kg

Answer

A single movable pulley gives a mechanical advantage of 2, halving the required effort to about 50 kg.

Psychometric Test Practice Test