Let's Prepare for Technical Interview (Part-5)

Mechanical Engineering Interview Questions:

Que: The purpose of jigs and fixtures are to: a. Increased production rate
b. Increased machining accuracy
c. Facilitate interchangeable manufacturing
d. Enable employ less skilled operators
e. All of the above
Ans: All of the above.

Que: Which one of the following methods produces gear by generating process
a. Hobbing
b. Casting
c. Punching
d. Milling
e. Broaching
Ans: Hobbing

Que: Tool life of the cutting tool is most affected by
a. Cutting speed
b. Tool geometry
c. Cutting feed and depth
d. Micro-structure of material being cut
e. Not using coolant and lubricant
Ans: Cutting speed

Que: Metal in machining operation is removed by
a. Tearing chips

b. Distortion of metal
c. Shearing the metal across a zone
d. Cutting the metal across a zone
e. Pushing the metal with tool
Ans: Shearing the metal across a zone.

Que: A feeler gauge is used to check
a. Radius
b. Screw pitch
c. Surface roughness
d. Unsymmetrical shape
e. Thickness of clearance
Ans: Thickness of clearance.

Que:The property of a material which enable it to resist fracture due to high impact loads is known as
a. Elasticity
b. Endurance
c. Strength
d. Toughness
e. Resilience
Ans: Toughness

Que: Spring index is
a. Ratio of coil diameter to wire diameter
b. Load required to produce unit deflection
c. Its capability of storing energy
d. Indication of quality of spring
e. Nothing
Ans: Ratio of coil diameter to wire diameter.

Que: Nodular iron has
a. High machinability
b. Low melting point

c. High tensile strength
d. Good fluidity
e. All of the above
Ans: All of the above.

Que: Explain the Second Law of Thermodynamics.?
Ans: The entropy of the universe increases over time and moves towards a maximum value.

Que: How do you measure temperature in a Wet Bulb Thermometer?
Ans: Wet bulb temperature is measured in a wet bulb thermometer by covering the bulb with a wick and wetting it with water. It corresponds to the dew point temperature and relative humidity.