Practice Tricky Advanced Machining Multiple Choice Questions with Answers Quiz-1

Q.1.

Material removal rates depend on which of the following factors?

a) Work piece material
b) Type of cutting
c) Shielding gases
d) All of the mentioned

Explanation

Q.2.

A low power factors indicates __________ energy required and __________ removal rates.

a) Low, low
b) Low, high
c) High, low
d) High, high

Explanation

Q.3.

What happens to the machining speed if the thickness of material is increased in PBM?

a) Decreases
b) Increases
c) Enhanced
d) Remains same

Explanation

Q.4.

What is the machining speed required for machining of 12mm thick plate withkW energy?

a) 1000 mm/min
b) 1500 mm/min
c) 2000 mm/min
d) 2500mm/min

Explanation

Q.5.

How much distortion is produced while machining using PBM?

a) 10%
b) 20%
c) 30%
d) No distortion is produced

Explanation

Q.6.

The cut edge of the material tends to be __________ than the base metal in PBM.

a) Smoother
b) Harder
c) Same as
d) None of the mentioned

Explanation

Q.7.

What is the thickness of the HAZ in PBM?

a) 0.001 to 0.23 mm
b) 0.25 to 1.12 mm
c) 1.3 to 2.56 mm
d) 2.73 to 5.26 mm

Explanation

Q.8.

How much thickness of cracks may arise beyond HAZ due to rapid cooling?

a) 1.6 mm
b) 2.6 mm
c) 3.6 mm
d) 4.6 mm

Explanation

Q.9.

What are the values of tolerances obtained by using PBM?

a) ± 0.6 mm
b) ± 1.6 mm
c) ± 2.6 mm
d) ± 3.6 mm

Explanation

Q.10.

What is the maximum thickness of the walls of tube machined using plasma arc?

a) 10 mm
b) 30 mm
c) 50 mm
d) 70 mm

Explanation

Q.11.

Which of the following are the advantages of PBM?

a) No chemical
b) Less harmful
c) Operates cleanly
d) All of the mentioned

Explanation

Q.12.

Which of the following chemicals are used in PBM?

a) Harmful chlorinated fluorocarbons
b) Acid cleaning chemicals
c) Dissolvable solvent chemicals
d) None of the mentioned

Explanation

Q.13.

How much amount of energy is required for machining using PBM?

a) Low
b) Moderate
c) High
d) Very high

Explanation

Q.14.

What are the disadvantages of PBM?

a) Large power supplies
b) Heat produced
c) Toxic fumes produced
d) All of the mentioned

Explanation

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