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

Power equals voltage squared divided by resistance

Answer

Current equals voltage squared divided by resistance

Answer

Resistance equals voltage squared multiplied by current

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

18.75 Nm

Answer

25 Nm

Answer

37.5 Nm

Question 3

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

Accepted Answer

Roller bearing

Answer

Thrust bearing

Answer

Ball bearing

Answer

Plain bearing

Question 4

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

Accepted Answer

On both the forward and return strokes

Answer

Only on the forward stroke

Answer

Only on the return stroke

Answer

Only when the inlet valve is open

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

To align the impeller with the casing

Answer

To reduce vibration in the pump

Answer

To control the flow rate of the pump

Question 6

In a three-phase electrical system at an industrial plant, what does 'power factor' measure?

Accepted Answer

The ratio of real power used to apparent power supplied

Answer

The number of phases in the electrical system

Answer

The maximum voltage in the system

Answer

The efficiency of individual motors