Mettl Technical Aptitude 3

Question 1

Water flows through a pipe at 4 m/s with a diameter of 0.1 m. The pipe narrows to a diameter of 0.05 m. What is the flow velocity in the narrower section?

Accepted Answer

16 m/s

Answer

By the continuity equation, A₁v₁ = A₂v₂; area ratio = (0.1)²/(0.05)² = 4, so v₂ = 4 × 4 = 16 m/s.

Question 2

In binary, what is the decimal value of 1101?

Accepted Answer

13

Answer

1101 in binary = 1×8 + 1×4 + 0×2 + 1×1 = 8 + 4 + 0 + 1 = 13.

Question 3

Which type of circuit allows current to flow in only one direction?

Accepted Answer

Rectifier circuit

Answer

A rectifier circuit converts AC to DC, allowing current to flow in only one direction using diodes.

Question 4

A 10 kg object is on a frictionless surface. A 50 N force is applied. What is the object's acceleration?

Accepted Answer

5 m/s²

Answer

Newton's second law: a = F/m = 50 N / 10 kg = 5 m/s².

Question 5

What is the purpose of a heat sink in electronic devices?

Accepted Answer

Dissipate heat away from components

Answer

A heat sink absorbs and dissipates heat generated by electronic components to prevent overheating.

Mettl Practice Test

Mettl Practice Test

Mettl Technical Aptitude 3