Computer Aided Manufacturing (3161917) MCQs

MCQs of NC/CNC Machine Tools

Showing 11 to 20 out of 80 Questions
1 2 3 4 5 6
11.

With reference to NC machines, which of the following statements is wrong?

(a)

Both closed-loop and open-loop control systems are used
(b)

Paper tapes, floppy disks, and magnetic tapes are used for data storage
(c)

Digitizers may be used as interactive input devices
(d)

Post processor is an item of hardware
Answer:

Option (c)

12.

Point-to-point systems are used for _____.

(a)

reaming
(b)

parting
(c)

grooving
(d)

facing
Answer:

Option (a)

13.

CNC machine has the following main advantage over conventional machining practice.

(a)

Ability to employ higher cutting speeds, feeds and depth of cut
(b)

Feedback control
(c)

Flexibility
(d)

None of the mentioned
Answer:

Option (b)

14.

Which one of the following is not the advantage of the CNC machine?

(a)

Reduce inspection time
(b)

Reduces tooling time
(c)

Higher rate of production
(d)

Higher initial cost
Answer:

Option (d)

15.

CNC machining centers do not include operations like ______.

(a)

milling
(b)

boring
(c)

welding
(d)

tapping
Answer:

Option (c)

16.

 For CNC machining skilled part programmers are not needed.

(a)

True
(b)

False
Answer:

Option (b)

17.

An absolute NC system is one in which all position coordinates are referred to one fixed origin called the zero point.

(a)

True
(b)

False
Answer:

Option (a)

18.

In machining of a workpiece, the material is removed by________.

(a)

drilling action
(b)

melting action
(c)

shearing acting
(d)

using brittleness of the material
Answer:

Option (c)

19.

The depth that the tool is plunged into the surface is called as ___________.

(a)

feed
(b)

depth of cut
(c)

depth of tool
(d)

working depth
Answer:

Option (b)

20.

Feed is measured in units of __________.

(a)

length/revolution
(b)

degree/revolution
(c)

length
(d)

degree
Answer:

Option (a)

Showing 11 to 20 out of 80 Questions
1 2 3 4 5 6