Advance Machine Tools
Practice Questions
Marks 1
1
Consider the following statements.
$$(P)$$ Computer aided process planning $$(CAPP)$$ takes input from material requirement plan $$(MRP).$$
$$(Q)$$ Production flow analysis helps in work cell formation.
$$(R)$$ Group technology takes input from choice of machining or cutting parameters.

Among the above statements, the correct one(s) is (are)

GATE PI 2016
2
In Computer Aided Process Planning, determination of process sequence for manufacture of any part design without predefined standard plans is known as
GATE PI 2015
3
In an open loop, point-to-point controlled $$CN$$ drilling machine, a stepper motor, producing $$200$$ angular steps per revolution drives the table of a drilling machine by one angular step per each pulse generated by a pulse generator (shown in figure). Each angular step moves the table by one Basic Length Unit $$(BLU)$$ along $$X$$ axis with a lead screw having a pitch of $$4mm.$$ If the frequency of pulse generator is doubled, the $$BLU$$ will GATE PI 2014 Machine Tools and Machining - Advance Machine Tools Question 32 English
GATE PI 2014
4
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
GATE PI 2012
5
The interpolator in a $$CNC$$ machine controls
GATE PI 2007
6
$$NC$$ contouring is an example of
GATE PI 2005
7
$$FMS$$ is well suited to mass scale manufacturing.
GATE PI 1994
8
In $$DNC$$ each machine tool is controlled by a dedicated computer.
GATE PI 1994
9
$$FAPT$$ is a part programming language.
GATE PI 1994
10
Control of group of $$NC$$ machines by a supervisory computer is known as ............... control.
GATE PI 1992
11
Feed motion can be provided with stepper motors in $$CNC$$
GATE PI 1991
12
The most common interpolation methods in continuous path $$NC$$ machining are
GATE PI 1990
13
Use of a robot for spray painting is primarily justified for improved.... ....... .... A ...... and reduced......... B....................

A. productivity / consistency
B. cost / hazard

GATE PI 1990
14
If the $$z$$-axis & $$x$$-axis of $$CNC$$ lathe are provided with straight line controls, it is possible to carry out
GATE PI 1989
Marks 2
1
The preparatory and miscellaneous codes used in $$CNC$$ part programming and the functions are given in the Table GATE PI 2017 Machine Tools and Machining - Advance Machine Tools Question 2 English

The correct combination of code and the respective function is

GATE PI 2017
2
In a numerical control $$(NC)$$ machine positioning system, the measures of precision are expressed by considering a single axis as shown in the Figure. GATE PI 2017 Machine Tools and Machining - Advance Machine Tools Question 1 English

If $$\sigma $$ is standard deviation of the error distribution, the $$L$$, $$M$$ and $$N$$ are

GATE PI 2017
3
A single axis $$CNC$$ table is driven by a $$DC$$ servo motor that is directly coupled to a lead screw of $$5$$ $$mm$$ pitch. The circular encoder attached to the lead screw generates $$1000$$ voltage pulses per revolution of the lead screw. The table moves at a constant speed of $$6$$ $$m/min.$$ The corresponding frequency (in $$kHz$$) of the voltage pulses generated by the circular encoder is __________________.
GATE PI 2016
4
Match the linear transformation matrices listed in the first column to their interpretations in the second column. GATE PI 2015 Machine Tools and Machining - Advance Machine Tools Question 5 English
GATE PI 2015
5
In a Flexible manufacturing system, the Automated Guided Vehicles $$(AGV)$$ move at a speed of $$50$$ $$m/min,$$ cover an average distance of $$150$$ $$m$$ to deliver and $$100$$ $$m$$ for return. If the time required for pick-up and drop is $$30$$ $$s$$ each, neglecting idle times, then the number of $$AGV$$$$s$$ required to meet the demand of $$50$$ delivers per hour is ____________.
GATE PI 2015
6
Each axis of $$NC$$ machine is driven by a stepper motor drive with a lead screw. The pitch of lead screw is $$p$$ $$mm.$$ The step angle of stepper motor per pulse input is $$\alpha $$ degrees/pulse. The ratio of gear drive in stepper motor drive is $$g$$(number of turns of the motor for each single turn of the lead screw). The number of pulses required to achieve a linear movement of $$x$$ $$mm$$ is
GATE PI 2014
7
A $$CNC$$ instruction $$G91\,\,\,G01\,\,\,X30\,\,\,Y40\,\,\,F100$$ commands the movement of tool along the path at a feed rate of $$100mm/min$$ $$(G91$$-incremental format and $$G01$$-linear interpolation). The feed rate of the tool (in $$mm/min)$$ along the $$X$$ axis will be _______________
GATE PI 2014
8
In a $$CAD$$ package, mirror image of a $$2D$$ points $$P(5, 10)$$ is to be obtained about a line which passes through the origin and makes an angle of $${45^ \circ }$$ counterclockwise with the $$X$$-axis. The coordinates of the transformed points will be
GATE PI 2013
9
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 a pitch of $$5mm.$$ 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 $$0.005mm.$$ When the table moves along the vertical axis by $$9mm.$$ The corresponding number of pulses generated by the encounter is
GATE PI 2010
10
The total angular movement (in degrees) of a lead screw with a pitch of $$5.0mm$$ to drive the work table by a distance of $$200mm$$ in a $$NC$$ machine is
GATE PI 2009
11
A titanium sheet of $$5.0mm$$ thickness is cut by wire cut $$EDM$$ process using a wire of $$1.0mm$$ diameter. A uniform spark gap of $$0.5mm$$ on both sides of the wire is maintained during cutting operation. If the feed rate of the wire into the sheet is $$20mm/min,$$ the material removal rate (in $$m{m^3}/\min $$) will be
GATE PI 2009
12
In a $$CNC$$ feed drive, a stepper motor with step angle of $$1.8deg$$ drives a lead screw with pitch of $$2mm.$$ The basic length unit $$(BLU)$$ for this drive is
GATE PI 2008
13
Suppose point $$P1$$ in $$APT$$ (Automatically programmed Tool) programming is coded by statement
$$P1 = POINT/XSMALL,\,\,\,INTOF,\,\,\,LN1,\,\,CR1$$

The coded geometric situation without causing error is

GATE PI 2008
14
A stepper motor has $$150$$ steps. The output shaft of the motor is directly coupled to a lead screw of pitch $$4mm,$$ which drives a table. If the frequency of pulse supply to the motor is $$200Hz$$, the speed of the table (in $$mm/min)$$ is
GATE PI 2008
15
The geometric transformation specified by

$$\left[ {x'\,\,y'\,\,1} \right] = \left[ {x\,\,y\,\,1} \right]\left[ {\matrix{ {0.5} & 0 & 0 \cr 0 & {0.25} & 0 \cr 1 & 2 & 1 \cr } } \right]$$ in a $$2D.$$
In a $$2D$$ $$CAD$$ system represents................

GATE PI 2007
16
In a $$CAD$$ package, a point $$P(6, 3, 1)$$ is projected along a vector $$v(-2, 1, -1).$$ The projection of this point on $$X-Y$$ plane will be
GATE PI 2007
17
Complete the manual part program for drilling a hole located at point $$(20, 20)$$ from the target point . The depth of the hole to be drilled is $$15mm$$
$$\eqalign{ & \,\,\,\,\,\,FROM/TARG \cr & \,\,\,\,\,\,GOTO/20,\,\,20,\,\,0 \cr} $$
GATE PI 2006
18
Match the following GATE PI 2006 Machine Tools and Machining - Advance Machine Tools Question 17 English
GATE PI 2006
19
Consider the following characteristics:

$$1.$$ Single machine tool.
$$2.$$ Manual materials handling system
$$3.$$ Computer control.
$$4.$$ Random sequencing of part to machines.

Which of the above characteristics are associated with flexible manufacturing system?

GATE PI 2005
20
GATE PI 2004 Machine Tools and Machining - Advance Machine Tools Question 27 English
GATE PI 2004
21
Given that the notations of robot joints are $$L$$-linear, $$O$$-orthogonal, $$R$$-rotational, $$T$$-twisting, and $$V$$-revolving, the anatomy of a polar configuration robot is described by the alphabetical string
GATE PI 2004
22
For machining the circular arc shown in the figure below on a $$NC$$ machine, the interpolation parameters $$(I.K)$$ and the incremental movements in the direction of the $$X$$ and $$Z$$ axes are programmed as GATE PI 2004 Machine Tools and Machining - Advance Machine Tools Question 20 English
GATE PI 2004
23
When $$3-2-1$$ principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is
GATE PI 2003
24
Match the following GATE PI 1994 Machine Tools and Machining - Advance Machine Tools Question 29 English
GATE PI 1994
25
Match the following GATE PI 1993 Machine Tools and Machining - Advance Machine Tools Question 23 English
GATE PI 1993
26
Match the following GATE PI 1993 Machine Tools and Machining - Advance Machine Tools Question 28 English
GATE PI 1993
27
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 $$10V.$$ If the voltage speed characteristic of the motor is linear, the applied voltage for a table of $$3m/min$$ is equal to:
GATE PI 1992
28
The component development and manufacturing activities when assisted by a computer are: Computer Aided Graphics $$(CAG), CAD, CAM, CAPP$$ and Computer Aided Quality Control $$(CAQC).$$ The most appropriate sequence of these activities is
GATE PI 1992
29
$$A\,\,2{1 \over 2}\,\,$$ control in a typical $$CNC$$ machine provides
GATE PI 1990