CAST Aptitude Test

Question 1

How much force does it take to lift the weight?

Accepted Answer

15 kg

Answer

Because there is only one load bearing section of rope, the force required to lift the weight is the same as the weight itself.

Question 2

How much force is required to lift the weight?

Accepted Answer

75 kg

Answer

Because there are two sections of rope supporting the weight, we can divide the force required to lift the weight 150/2 = 75 kg.

Question 3

How much force does it take to lift the weight?

Accepted Answer

70 kg

Answer

Because there is only one load bearing section of rope, the force required to lift the weight is the same as the weight itself.
The answer is 70 kg.

Question 4

What is the smallest amount of force required to lift the weight?

Accepted Answer

15 kg

Answer

To determine how much force is required to lift the weight, determine how many sections of the rope are bearing the weight and divide the weight among them.

30/ 2 = 15 kg

Question 5

What is the smallest amount of force required to lift the weight?

Accepted Answer

200 kg

Answer

This pulley system appears to be more complicated than previous examples, but the same principle applies. We divide the weight among the four rope supporting sections. 800 / 4 = 200 kg

CAST Test Practice Test

CAST Test Practice Test

CAST Aptitude Test