Advanced Machining Processes Multiple Choice Questions on “WJM – Advantages and Disadvantages”.
1. In how many directions, can the cutting takes place in Water jet machining?
a) Uni-directional
b) Bi-directional
c) Multi-directional
d) None of the mentioned
Answer: c
Clarification: Water jet machining has multi directional cutting capacity i.e.., in any direction in three dimensional space.
2. In Water jet machining, cuts can be started at which place of workpiece?
a) From left
b) From right
c) From middle
d) From any point
Answer: d
Clarification: In WJM, cuts can be started from any point on the workpiece.
3. State whether the following statement is true or false.
“To start the cuts in Water jet machining, pre-drilled holes are not necessary.”
a) True
b) False
Answer: b
Clarification: In Water jet machining, we need not require any pre-drilled holes to start the cuts.
4. Which of the following is not an advantage of Water jet machining?
a) Burr produced is minimal
b) No Heat is produced
c) Relatively low hourly rates
d) Environmentally safe
Answer: c
Clarification: Costs per hour are relatively high in Water jet machining.
5. In Water jet machining, tool need not require sharpening once the machining is done.
a) True
b) False
Answer: a
Clarification: Tool does not wear in water jet machining, so it need not be sharpened.
6. Which of the following secondary processes are eliminated in Water jet machining?
a) Grinding of surface
b) Surface treatment
c) Polishing of surface
d) All of the mentioned
Answer: d
Clarification: All the mentioned secondary processes above, are eliminated in Water jet machining.
7. How many parts are cut using Water jet machining, on a single blank?
a) One part
b) Two parts
c) Three parts
d) Multiple parts
Answer: d
Clarification: Depending up on the kerf width, multiple parts can be machined using a single blank.
8. Which of the following is the disadvantage of water jet machining?
a) Narrow kerf width
b) Small diameter of nozzle
c) Not suitable for mass production
d) Burr is minimal
Answer: c
Clarification: Due to high maintenance, WJM cannot be used for mass production.