Engineering Questions with Answers - Multiple Choice Questions
Machine Dynamics MCQ – Programme using Least Square Technique
1 - Question
The sum of the shape functions over the element is always equal to:
a) Zero
b) Infinity
c) Unity
d) None of the mentioned
View Answer
Answer: c
Explanation: A shape function is always equal to one at its designated node and zero at the other nodes of the element.
2 - Question
Stiffness is ______________ to the length of the element.
a) Inversely proportional
b) Directly proportional
c) Exponential
d) Independent
View Answer
Answer: d
Explanation: None.
3 - Question
Computer will perform the data processing functions in
a) NC
b) CNC
c) DNC
d) ACS
View Answer
Answer: c
Explanation: In NC it performs numerical problems.
In DNC it will perform data processing functions.
4 - Question
The first commercial CNC machine was developed in the year:
a) 1970
b) 1972
c) 1976
d) 1980
View Answer
Answer: a
Explanation: The first NC machines were built in the 1940s and 1950s.
CNC was developed in 1970.
5 - Question
CNC drilling machine is considered to be a:
a) Point-to-point controlled machine
b) Straight line controlled machine
c) Continuous path controlled machine
d) Servo-controlled machine
View Answer
Answer: a
Explanation: None.
6 - Question
The lost motion in CNC machine tool is on account of:
a) Backlash in gearing
b) Wind-up of drive shafts
c) Deflection of machine tool members
d) All of the mentioned
View Answer
Answer: a
Explanation: The system must provide sufficient feedback and programming capacity to allow for backlash and lost motion between motor and load. Computer numerical control (CNC) of machine tools has embodied position control for a number of years.
7 - Question
The axes of turning machine arc:
a) Z and X-axes
b) X and Y-axes
c) Z and Y-axes
d) X, Y and Z-axes
View Answer
Answer: a
Explanation: None.
8 - Question
On turning lathes the machine zero point is generally at the:
a) Head stock of lathe spindle nose face
b) Dead center of tail stock
c) Tool point mounted on tool post
d) none of the mentioned
View Answer
Answer: b
Explanation: On turning lathes, the machine zero point is generally at the centre of the spindle nose face.
9 - Question
Dwell is defined by:
a) G04
b) G03
c) G02
d) G01
View Answer
Answer: a
Explanation: G02 – Circular interpolation in clockwise direction
G91 – incremental dimension.
10 - Question
M30 stands for:
a) End of program
b) End of block
c) End of tape and tape rewind
d) Coolant on/ off
View Answer
Answer: a
Explanation: M30 – Program Stopping and Ending.