Computer Aided Manufacturing (3161917) MCQs

MCQs of NC/CNC Machine Tools

Showing 11 to 20 out of 80 Questions
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