ExxonMobil Test ExxonMobil Mechanical Aptitude 3

Question 1

In electrical terms, what does Ohm's Law state?

Accepted Answer

Voltage equals current multiplied by resistance

Answer

Ohm's Law states V = I × R, where V is voltage, I is current, and R is resistance.

Question 2

A wrench with a 0.4-meter handle applies a force of 75 N. What torque is produced?

Accepted Answer

30 Nm

Answer

Torque = Force × Length = 75 N × 0.4 m = 30 Nm.

Question 3

Which type of bearing is best suited for applications with high radial loads and moderate speeds?

Accepted Answer

Roller bearing

Answer

Roller bearings distribute load over a larger contact area, making them ideal for high radial loads.

Question 4

In a double-acting reciprocating compressor, when does compression occur?

Accepted Answer

On both the forward and return strokes

Answer

A double-acting compressor compresses gas on both the forward and return strokes of the piston, maximizing efficiency.

Question 5

What is the primary function of a mechanical seal in a centrifugal pump?

Accepted Answer

To prevent leakage of the pumped fluid along the shaft

Answer

Mechanical seals prevent the pumped fluid from leaking out along the rotating shaft where it exits the pump casing.

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