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Mechanical Engineering

What happens when the current density is low in ECM?

» Unconventional Machine Process (UMP) solved MCQs /
Question:

What happens when the current density is low in ECM?

A.

pitting occurs

B.

etching occurs

C.

pitting & etching occurs

D.

none of the mentioned

Answer» c. pitting & etching occurs

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

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» Unconventional Machine Process (UMP) solved MCQs

Selection of electrolyte does not depend on which of the following factors?

» Unconventional Machine Process (UMP) solved MCQs /
Question:

Selection of electrolyte does not depend on which of the following factors?

A.

work piece material

B.

dimensional tolerance

C.

heat affected zones

D.

machining productivity

Answer» c. heat affected zones

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

Selection of electrolyte does not depend on which of the following factors? Read More »

» Unconventional Machine Process (UMP) solved MCQs

Apparent current efficiency is due to which of the following factors?

» Unconventional Machine Process (UMP) solved MCQs /
Question:

Apparent current efficiency is due to which of the following factors?

A.

choice of wrong valence

B.

passivation of anodic surface

C.

gas evolution at anode

D.

all of the mentioned

Answer» d. all of the mentioned

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

Apparent current efficiency is due to which of the following factors? Read More »

» Unconventional Machine Process (UMP) solved MCQs

What must be the value of the pressure of electrolytic solution used in ECM?

» Unconventional Machine Process (UMP) solved MCQs /
Question:

What must be the value of the pressure of electrolytic solution used in ECM?

A.

1 to 10 kpa

B.

10 to 80 kpa

C.

100 to 200 kpa

D.

300 to 400 kpa

Answer» c. 100 to 200 kpa

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

What must be the value of the pressure of electrolytic solution used in ECM? Read More »

» Unconventional Machine Process (UMP) solved MCQs

What happens to the product cycle time, if the machining performance is improved?

» Unconventional Machine Process (UMP) solved MCQs /
Question:

What happens to the product cycle time, if the machining performance is improved?

A.

increases

B.

decreases

C.

remains same

D.

none of the mentioned

Answer» b. decreases

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

What happens to the product cycle time, if the machining performance is improved? Read More »

» Unconventional Machine Process (UMP) solved MCQs

State whether the following statement is true or false about electrolyte in ECM. “Machinability in ECM is enhanced, when electrolyte is heated.”

» Unconventional Machine Process (UMP) solved MCQs /
Question:

State whether the following statement is true or false about electrolyte in ECM. “Machinability in ECM is enhanced, when electrolyte is heated.”

A.

true

B.

false

Answer» a. true

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

State whether the following statement is true or false about electrolyte in ECM. “Machinability in ECM is enhanced, when electrolyte is heated.” Read More »

» Unconventional Machine Process (UMP) solved MCQs

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle θ= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?

» Thermal Engineering 2 solved MCQs /
Question:

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle θ= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?

A.

0.814

B.

0.27

C.

1.5

D.

3.5

Answer» b. 0.27

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle θ= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface? Read More »

» Thermal Engineering 2 solved MCQs

The Prandtl Number approximates

» Thermal Engineering 2 solved MCQs /
Question:

The Prandtl Number approximates

A.

momentum diffusivity to thermal diffusivity

B.

thermal diffusivity to momentum diffusivity

C.

shear stress to thermal diffusivity

D.

thermal diffusivity to kinematic viscosity

Answer» a. momentum diffusivity to thermal diffusivity

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

The Prandtl Number approximates Read More »

» Thermal Engineering 2 solved MCQs