250+ TOP MCQs on LBM-Advantages and Limitations and Answers

Advanced Machining Processes Multiple Choice Questions on “LBM-Advantages and Limitations”.

1. Which of the following is not an advantage of LBM?
a) Rapid machining
b) Low operating cost
c) High equipment cost
d) No tool wear
Answer: c
Clarification: Rapid machining, low operating cost and no tool wear are some of the advantages of Laser beam machining.

2. Which of the following systems is used for locating the hole accurately for alignment?
a) Mechanical control system
b) Optical laser system
c) Measurement system
d) Alignment system
Answer: b
Clarification: Holes can be accurately located using optical laser system for alignment in Laser beam machining.

3. Very __________ holes with a ________ aspect ratio can be produced using Laser beam machining.
a) Small, small
b) Small, large
c) Large, small
d) Large, large
Answer: b
Clarification: In Laser beam machining, very small holes with large aspect ratios can be produced.

4. How are the machining times in Laser beam machining?
a) Very slow machining times
b) Slow machining times
c) Moderate machining times
d) Fast machining times
Answer: d
Clarification: Machining is very much rapid and the setup times are economical in Laser beam machining.

5. How is the operating cost of the machines used in Laser beam machining?
a) Low
b) Moderate
c) High
d) Very high
Answer: a
Clarification: The operating cost of the machines in LBM is low but the equipment cost itself is of high cost.

6. State whether the following statement is true or false regarding the advantages of LBM.
“In LBM, difficult to cut machine material can also be machined.”
a) True
b) False
Answer: a
Clarification: A large variety of hard and difficult to cut materials can be machined using LBM.

7. How much amount of tapers are occurred in Laser drilled holes?
a) No taper
b) Negligible amount of taper
c) Some amount
d) None of the mentioned
Answer: c
Clarification: Tapers are generally occurred in the direct drilling of holes using Laser beam machining.

8. State whether the following statement regarding Laser beam machining is true or false.
“In LBM, a blind hole of precise depth is easy to achieve.”
a) True
b) False
Answer: b
Clarification: A blind hole of precise is difficult to achieve in Laser beam machining.

9. What is the maximum depth up to which holes can be drilled using LBM?
a) 10 mm
b) 30 mm
c) 50 mm
d) 70 mm
Answer: c
Clarification: The thickness of the material that can be laser drilled is restricted to 50 mm.

10. What is to be done to the adherent material which are found at exit holes?
a) Shape them
b) Leave away
c) Remove them
d) Flatten them
Answer: c
Clarification: Adherent material found at the exit of holes has to be removed in LBM.