MS Master of Mechanical Engineering 2

Question 1

What is the Bernoulli equation primarily used for in fluid mechanics?

Accepted Answer

Relating pressure, velocity, and elevation along a streamline in inviscid flow

Answer

Bernoulli's equation states that along a streamline in steady, inviscid flow, the sum of pressure, kinetic, and potential energy per unit volume remains constant.

Question 2

In CNC machining, what does the G-code command G02 typically instruct the machine to perform?

Accepted Answer

Circular interpolation in the clockwise direction

Answer

G02 commands the CNC machine to move the cutting tool in a clockwise circular arc at the programmed feed rate.

Question 3

What does the term 'stress concentration factor' (Kt) represent in mechanical design?

Accepted Answer

The ratio of maximum stress to nominal stress near a geometric discontinuity

Answer

The stress concentration factor Kt is the ratio of the peak local stress at a geometric discontinuity (hole, notch, fillet) to the nominal stress in the net section.

Question 4

What is the difference between conduction and convection heat transfer?

Accepted Answer

Conduction occurs in stationary media; convection involves fluid motion

Answer

Conduction transfers heat through a stationary medium via molecular vibration, while convection transfers heat through the bulk motion of a fluid.

Question 5

In a gear system, what does the term 'gear ratio' determine?

Accepted Answer

The relationship between input and output speed and torque

Answer

The gear ratio determines how speed and torque are transformed between input and output shafts; a higher gear ratio reduces speed and increases torque proportionally.

MS - Master of Science Practice Test

MS - Master of Science Practice Test

MS Master of Mechanical Engineering 2