ExxonMobil Test ExxonMobil Mechanical Aptitude

Question 1

If Gear A has 20 teeth and Gear B has 40 teeth, and Gear A rotates at 100 RPM, what is the speed of Gear B?

Accepted Answer

50 RPM

Answer

25 RPM

Answer

75 RPM

Answer

200 RPM

Question 2

A valve is used to control fluid flow in a pipeline. Which type of valve provides the best flow control with a quarter-turn operation?

Accepted Answer

Ball valve

Answer

Gate valve

Answer

Globe valve

Answer

Butterfly valve

Question 3

In a hydraulic system, if the input piston has an area of 5 cm² and a force of 100 N is applied, what pressure is generated?

Accepted Answer

20 Pa

Answer

10 Pa

Answer

100 Pa

Answer

500 Pa

Question 4

Which type of pump is best suited for moving high-viscosity fluids like heavy crude oil?

Accepted Answer

Gear pump

Answer

Centrifugal pump

Answer

Jet pump

Answer

Turbine pump

Question 5

A lever has its fulcrum 1 meter from a 200 N load. How far from the fulcrum must a 50 N force be applied to balance it?

Accepted Answer

4 meters

Answer

2 meters

Answer

3 meters

Answer

5 meters

Question 6

In a refinery heat exchanger, what is the primary purpose of baffles?

Accepted Answer

To increase turbulence and improve heat transfer

Answer

To prevent corrosion of the tubes

Answer

To reduce the pressure drop across the exchanger

Answer

To filter contaminants from the fluid