ExxonMobil Test ExxonMobil Mechanical Aptitude 2

Question 1

A pulley system uses 3 ropes supporting a load. If the load weighs 900 N, how much force is needed to lift it (ignoring friction)?

Accepted Answer

300 N

Answer

200 N

Answer

450 N

Answer

600 N

Question 2

What happens to the boiling point of water when pressure is increased?

Accepted Answer

It increases

Answer

It decreases

Answer

It stays the same

Answer

It becomes unpredictable

Question 3

In a centrifugal pump, what is cavitation?

Accepted Answer

Formation and collapse of vapor bubbles causing damage

Answer

A buildup of scale on the impeller

Answer

Excessive vibration due to imbalance

Answer

Leakage through the mechanical seal

Question 4

Which of the following best describes the function of a pressure relief valve?

Accepted Answer

To prevent overpressure by releasing fluid when pressure exceeds a set point

Answer

To maintain constant flow rate

Answer

To measure pressure in a pipeline

Answer

To reduce pressure for downstream equipment

Question 5

A belt drives two pulleys. Pulley A has a diameter of 10 cm and rotates at 400 RPM. What is the RPM of Pulley B with a diameter of 20 cm?

Accepted Answer

200 RPM

Answer

100 RPM

Answer

300 RPM

Answer

800 RPM

Question 6

What is the main advantage of a floating roof in a crude oil storage tank?

Accepted Answer

It reduces vapor space and minimizes evaporative losses

Answer

It allows easier cleaning of the tank interior

Answer

It increases the structural strength of the tank

Answer

It prevents corrosion on the tank walls