Question 1

What is the full form of ATC?

Accepted Answer

Automatic tool changer (ATC) is the correct full form, which is a system used in CNC machines to change tools quickly between cuts.

Question 2

In which system we get feedback?

Accepted Answer

In a closed-loop system, feedback is used to compare the output with the desired input, allowing the system to adjust its performance to meet the desired output.

Question 3

How many maximum tools can ATC hold?

Accepted Answer

The answer of How many maximum tools can ATC hold?
...

Question 4

In the CNC machine which device used to hold the workpiece?

Accepted Answer

Automatic pallet changers and automatic work part positioners are both devices used in CNC machines to hold and position the workpiece for machining.

Question 5

In a CAD package, mirror image of a 2D point P (5, 10) is to be obtained about a line which passes through the origin and makes an angle of 45° counterclockwise with the X-axis. The coordinates of the transformed point will be

Accepted Answer

The mirror image of a point P(x, y) about a line making an angle θ with the x-axis can be found using rotation and reflection transformations. First, rotate the point by -θ to align the mirror line with the x-axis, then reflect it over the x-axis, and finally rotate it back by θ. For a 45° angle, this simplifies to swapping the x and y coordinates of the point and then inverting the sign of the new y-coordinate to get the mirror image. Thus, the mirror image of (5, 10) about a line making a 45° angle with the x-axis is (10, -5), which is option D.

Question 6

NC contouring is an example of

Accepted Answer

NC contouring, or Numerical Control contouring, involves the tool moving along a continuous path to create complex shapes and contours, which is characteristic of continuous path positioning.

Question 7

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

Accepted Answer

The answer of With reference to NC machines, which of...

Question 8

In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right compensation, the trajectory of the cutter will be

Accepted Answer

Cutter radius compensation is used in CNC milling to adjust the tool path for the radius of the tool. Since the tool has a radius of 5 mm (half of the 10 mm diameter), the tool path needs to be offset by this amount to accurately machine the intended geometry. Option A correctly offsets the tool path by 5 mm outward from the original corner points to account for the tool radius, ensuring the machined island dimensions are accurate.

Question 9

The lost motion in CNC machine tool is on account of

Accepted Answer

The answer of The lost motion in CNC machine tool...

Quiz 4: Computer-Aided Design (CAD)