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GATE Past Year Questions: Numerical Control | Manufacturing Engineering - Mechanical Engineering PDF Download

Question for GATE Past Year Questions: Numerical Control
Try yourself:For a 3-axes CNC table, the slide along the vertical axis of the table driven by a DC servo motor via lead screw nut mechanism. The lead screw has pitch of 5 mm. This lead screw is fitted with a relative (incremental) circular encoder. The basic length unit (BLU) of the slide along the vertical axis of the table is 0.005 mm. When the table moves along the vertical axis by 9 mm. The corresponding number of pulses generated by the encoder is

[2010]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:In a CNC feed drive, a stepper motor with step angle of 1.8 degree drives a lead screw with pitch of 2 mm. The basic length unit (BLU) for this drive is

[2008]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:The interpolator in a CNC machine controls

[2007]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Match the following:
Group-I
P. G08
Q. G41
R. G01
S. G02
Group-II
1. Linear interpolation
2. Acceleration
3. Circular interpolation
4. Cutter radius compensation
P Q R S

[2006]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:For machining the circular arc shown in the figure below on a NC machining, the interpolation parameters (I, K) and the incremental movements in the direction of the X and Z axes are programmed as

GATE Past Year Questions: Numerical Control | Manufacturing Engineering - Mechanical Engineering

[2004]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Match the following​

Group I
P. G09
Q. G41
R. G01
S. G03
Group II
1. Linear interpolation
2. Retardation
3. Circular interpolation
4. Cutter radius compensation

  P Q R S

[1994]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:A DC servomotor is directly driving an NC table. The pitch of the lead screw of the table is 5 mm. The motor rotates at 100 rpm for an applied voltage of 10 V. If the voltage speed characteristic of the motor is linear, the applied voltage for a table of 3 m/min is equal to

[1992]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Feed motion can be provided with stepper motors in CNC

[1991]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:A  GATE Past Year Questions: Numerical Control | Manufacturing Engineering - Mechanical Engineeringaxis control in a typical CNC machine provides

[1990]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:The most common interpolation methods in continuous path NC machining are

[1990]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:If the z-axis an d x-axis o f CNC lath e are provided with straight line controls, it is possible to carry out

[1989]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Interpolator in a CNC machine

[2018]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Circular arc on a part profile is being machined on a vertical CNC milling machine, CNC part program using metric units with absolute dimensions is listed below: ............................................
N60 G01 X 30 Y 55 Z 5 F50N70
G02 X 50 Y 35 R 20N80 G01 Z 5............................................
The coordinates of the centre of the circular arc are:

[2017]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:In a CNC milling operation, the tool has to machine the circular arc from point (20, 20) to (10, 10) at sequence number 5 of the CNC part program. If the center of the arc is at (20,10) and the machine has incremental mode of defining position coordinates, the correct tool path command is

[2015]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:A drill is positioned at point P and its has to proceed to point Q. The coordinates of point Q in the incremental system of defining position of a point in CNC part program will be
GATE Past Year Questions: Numerical Control | Manufacturing Engineering - Mechanical Engineering

[2015]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:The function of interpolator in a CNC machine controller is to

[2015]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:For the CNC part programming, match Group A with Group B :
Group A
P. Circular interpolation, counter clock wise
Q. dwell
R. circular interpolation, clock wise 
S. Point to point countering

Group B
I. G02
II. G03
III. G04
IV. G00

[2014]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:For machining a rectangular island represented by coordinates P(0,0), Q(100,0), fl( 100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used. The trajectory of the cutter centre to machine the island PQRS is

[2014]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0, 0) and (100, 100) on-the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min. Milling time for the slot (in seconds) is

[2012]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:In a CNC program block, N002 G02 G91 X40 Z40..., G02 and G91 refer to

[2010]

 

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Match the following:
NC Code    Definition
P. M05      1. Absolute coordinate system
Q. Q01      2. Dwell
R. Q04      3. Spindle stop
S. G90      4. Linear interpolation

[2009]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:A customer insists on a modification to change the BLU of the CNC drive to 10 microns without changing the table speed. The modification can be accomplished by

[2008]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:The Basic Length Unit (BLU), i.e., the table movement corresponding to 1 pulse of the pulse generator, is

[2008]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Which type of motor is NOT used in axis or spindle drives of CNC machine tools?

[2007]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:NC contouring is an example of

[2006]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:The tool of an NC machine has to move along a circular arc from (5,5) to (10,10) while performing an operation. The centre of the arc is at (10,5). Which one of the following NC tool path commands performs the above mentioned operation?

[2005]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Which among the NC operations given below are continuous path operations?
Arc Welding (AW)
Drilling (D)
Laser Cutting of Sheet (LC)
Milling (M)
Punching in Sheet Metal (P)
Spot Welding (SW)

[2005]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0the type of tool motion will be

[2004]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:Machining of complex shapes on CNC machine requires

[2002]

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Question for GATE Past Year Questions: Numerical Control
Try yourself: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), (60, 30) and (50, 0). By applying cutter radius compensation, the trajectory of the cutter will be

[2000]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:In a point to point control NC machine, the slides positioned by an integrally mounted stepper motor drive. If the specification of the motor is 1 deg/pulse, and the pitch Of the lead screw is 3.6 mm.What is the expected positioning accuracy?

[1997]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:With reference to NC machine, which of the following statement is wrong?

[1993]

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Question for GATE Past Year Questions: Numerical Control
Try yourself:In PTP type of NC system

[1992]

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Question for GATE Past Year Questions: Numerical Control
Try yourself: In NC part programming spindle speed of 730 rpm will be coded by the magic -3 rule as

[1989]

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FAQs on GATE Past Year Questions: Numerical Control - Manufacturing Engineering - Mechanical Engineering

1. What is numerical control in mechanical engineering?
Ans. Numerical control in mechanical engineering refers to the use of computer-aided systems to control and automate the operation of machines. It involves the use of pre-programmed codes to control the movement of tools, motors, and other mechanical components, allowing for precise and efficient machining processes.
2. How does numerical control benefit the field of mechanical engineering?
Ans. Numerical control offers several benefits in mechanical engineering. It allows for increased precision and accuracy in machining operations, leading to higher quality products. It also enables automation and reduces the need for manual intervention, resulting in improved productivity and reduced labor costs. Additionally, numerical control systems offer flexibility and versatility, allowing for quick changes in machining processes.
3. What are the main components of a numerical control system in mechanical engineering?
Ans. A numerical control system in mechanical engineering typically consists of three main components: the control unit, the machine tool, and the part program. The control unit is responsible for processing and interpreting the part program, which contains the instructions for the machining operation. The machine tool is the physical equipment that performs the machining process, and it is controlled by the control unit based on the instructions in the part program.
4. How is a part program created for numerical control in mechanical engineering?
Ans. A part program for numerical control in mechanical engineering is typically created using computer-aided design (CAD) or computer-aided manufacturing (CAM) software. The software allows engineers to design the desired part or component and generate the corresponding machining instructions in the form of a part program. The program contains codes that specify tool movements, cutting parameters, and other relevant instructions to achieve the desired machining outcome.
5. What are some applications of numerical control in mechanical engineering?
Ans. Numerical control finds applications in various areas of mechanical engineering, including manufacturing processes such as milling, turning, drilling, and grinding. It is commonly used in the production of automotive parts, aerospace components, and precision machinery. Additionally, numerical control is employed in prototyping, rapid manufacturing, and computer-aided inspection, enabling efficient and accurate production in these fields.
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Document Description: GATE Past Year Questions: Numerical Control for Mechanical Engineering 2024 is part of Manufacturing Engineering preparation. The notes and questions for GATE Past Year Questions: Numerical Control have been prepared according to the Mechanical Engineering exam syllabus. Information about GATE Past Year Questions: Numerical Control covers topics like and GATE Past Year Questions: Numerical Control Example, for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for GATE Past Year Questions: Numerical Control.
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