ADF ADF Mechanical Reasoning 3

Question 1

In a series electrical circuit containing two light bulbs, what happens to the second bulb if the first bulb burns out?

Accepted Answer

The second bulb also goes out

Answer

The second bulb gets brighter

Answer

The second bulb continues to work normally

Answer

The second bulb flickers

Question 2

What is the function of a carburetor in a gasoline engine?

Accepted Answer

To mix fuel and air in the correct ratio for combustion

Answer

To cool engine components

Answer

To lubricate moving engine parts

Answer

To filter exhaust gases before emission

Question 3

Which tool is specifically designed to tighten a fastener to an exact force specification?

Accepted Answer

Torque wrench

Answer

Standard open-end wrench

Answer

Adjustable pliers

Answer

Allen key

Question 4

A spring scale is used to measure an object. What quantity does it directly measure?

Accepted Answer

Weight (gravitational force) in Newtons

Answer

Mass in kilograms

Answer

Volume in cubic centimetres

Answer

Density in kg/m³

Question 5

When air is pumped into a sealed tire and pressure increases, what change has occurred at the molecular level?

Accepted Answer

The air molecules are moving faster and colliding more forcefully

Answer

The air molecules have grown in size

Answer

The chemical composition of air has changed

Answer

The mass of individual molecules has increased

Question 6

If a vehicle engine produces 100 kW at 3,000 RPM and the same engine produces 100 kW at 5,000 RPM, what must be true about the torque at the higher RPM?

Accepted Answer

Torque is lower at 5,000 RPM

Answer

Torque is the same at both speeds

Answer

Torque is higher at 5,000 RPM

Answer

Torque is unrelated to RPM