Mettl Technical Aptitude 2

Question 1

A gear with 40 teeth meshes with a gear with 10 teeth. If the smaller gear rotates at 200 RPM, what is the RPM of the larger gear?

Accepted Answer

50 RPM

Answer

Gear ratio = 10/40 = 1/4, so the larger gear rotates at 200 × (10/40) = 50 RPM.

Question 2

Which material has the highest electrical conductivity at room temperature?

Accepted Answer

Silver

Answer

Silver has the highest electrical conductivity of any element, though copper is more commonly used due to cost.

Question 3

In a hydraulic system, if the input piston has an area of 2 cm² and the output piston has an area of 20 cm², and a force of 100 N is applied to the input, what is the output force?

Accepted Answer

1000 N

Answer

Pascal's principle: Output force = Input force × (Output area / Input area) = 100 × (20/2) = 1000 N.

Question 4

A program uses a stack data structure. Items are pushed in order: A, B, C. What is the order they are popped?

Accepted Answer

C, B, A

Answer

A stack follows LIFO (Last In, First Out), so C is popped first, then B, then A.

Question 5

What does the acronym API stand for in software development?

Accepted Answer

Application Programming Interface

Answer

API stands for Application Programming Interface, a set of rules allowing software components to communicate.

Mettl Practice Test

Mettl Practice Test

Mettl Technical Aptitude 2