Unit test cim 2.docx a
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The document is a 20 question multiple choice test on computer integrated manufacturing systems and CNC machining. It covers topics like: - Feed rates for tapping tools - APT programming language commands - Motion statements, geometry statements, and other rules for APT programming - Canned cycles, axes drives, and spindle control statements - Defining arcs in computer aided drafting
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![SKIT, M&G, JAIPUR Set-A
UNIT TEST -2
CLASS: VIII Sem ( ) SUBJECT: COMPUTER INTEGRATED MANUFACTURING SYSTEM M.M:20
[UNIT-II]
TimeAllowed: 1 Hr Date: . FEB.2016
NAME. ROLL NO.
Multiple Choice Type Questions:
1. Feed rate of tapping tool is calculated as
a)Tappitch*spindle speed b)tap pitch*tool length
c)tap pitch/spindle speed d)spindle speed/tap pitch
2. M08 refers to-
a)tool change b)coolant on
c)coolant off d)spindle CW
3. In APT language, the cutter motion in incremental coordinate
mode is addressed as
a)GO/TO. b)GOTO/..
c)GOFWD/.. d)GODLTA/.
4. Which of the following are rules of programming NC machine
tool in APT languages?
i. Onlycapital letters
ii. A periodis placed at endof each statement
iii. Insertion ofspace doesnt affect APT word
a) ii &iii b) i & iii c) i & ii d)i ,ii &iii
5. Feed drives in CNC milling machines are provide by
a)stepper motor b)synchronous motor
c) induction motor d)servo motor
6. Which of the following is not the statement of APT languages?
a) geometrystatement b) preprocessor statement
c) auxiliarystatement d) motionstatement
7. Which one is PTP motion commands in APT languages?
a)GODLTA b)GOFWD c)GORGT d)TANTO
8. GODLTAcommand specifies
a) Incremental move for tool b) Descriptive data oftools
c) Contouring motions oftools d) Delete the previous data
9. The general form of an APT geometry statement is
a) geometrytype/descriptive data
b) descriptive data /geometrytype
c) geometrytype/motioncommand
d) geometryvalues*descriptive data
10. Which code is used for Return from reference point?
a) G28 b) G29 c) G31 d) G27
11. Which code is used for Program stop?
a)M30 b)M01 c)M00 d)M02
12. H-code represents
a) Offset amount b) Cutter compensation
c) Dwell time d) All of these
13. A block of information in NC program means
a) one row ontape
b) one complete instruction
c) a word comprisingseveral row ontape
d) one complete program for job
14. Which of the following are valid for point to point motion
statement in APT languages?
i. GOTO/ ii.GODLTA/ iii.GOPT/
a)ii &iii b)I & iii c)I &ii d)all of these
15. Machining of complex shapes on CNC machines requires
a) simultaneous control of x, y& z axes
b) ) simultaneous control of x & y axes
c) independent control ofx, y& z axes
d) independent control of x & y axes
16. In PTP NC system
a) control of position andvelocityof tool is essential
b) control ofonlypostionof tool is sufficient
c) control of onlyvelocityof tool is sufficient
d) none ofthese
17. which code is used for canned cycle for drilling?
a) G44 b)G67 c)G89 d)G72
18. Axes drives in machining centres
a) ACsynchronous motor b)DCservo motor
c)stepper motor d) inductionmotor
19. The statement which control the operation of spindle of
machine tool is called
a) motionstatement b)postprocessor
statementc)preprocessor statement d)auxiliarystatement
20. In computer aided drafting, an arc is defined by](https://image.slidesharecdn.com/unittestcim2-160416070910/85/Unit-test-cim-2-docx-a-1-320.jpg)
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This engineering mechanics tutorial sheet contains 6 problems related to mechanics. Problem 1 asks about the vertical separation between water drops falling from a tap. Problem 2 deals with the acceleration of a particle moving along a straight line. Problem 3 asks about the angle of projection given the velocity of a particle at its highest point. Problem 4 involves calculating the acceleration and tension when two masses are hung from an ideal pulley. Problem 5 asks about the range of a shot projected up a sloped plane. Problem 6 uses D'Alembert's principle to find the acceleration and tension when two blocks are connected by a string and pulled by a force.Mechanics 7.docx suman anand
Mechanics 7.docx suman anandSunil Kumar
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This tutorial sheet contains 5 problems related to engineering mechanics:
1) Calculating the height of a tower given that two stones dropped from different heights on the tower reach the ground at the same time.
2) Determining the height above a higher point from which a body must have started falling to pass two points 20m apart vertically in 0.4 seconds.
3) Finding the magnitude of velocity and acceleration of a particle moving in a curvilinear motion at a given time.
4) Calculating the time difference between hits of a target by bullets shot from two guns at different angles but the same range and velocity.
5) Deriving an expression for the height of a point given that a particleMechanics 6
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This document contains 6 problems related to belt drive systems. The problems involve determining belt tension, power transmitted, torque, pulley diameters, belt length, and other variables. Key details provided include pulley diameters, distance between pulleys, belt tension limits, rotational speeds, coefficients of friction, and power transmitted. The problems cover both open and crossed belt drive configurations.Em sheet 5
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This document contains 6 problems related to engineering mechanics. Problem 1 asks about Coulomb's friction law and drawing a free body diagram for a ladder on a rough surface. Problem 2 involves determining the force needed to cause slipping between two blocks, one on top of the other. Problem 3 asks about the friction force on a ladder at an angle on a rough wall and ground. Problem 4 differentiates angle of friction from angle of repose and asks about how high a man can climb a ladder before slipping. Problem 5 involves determining the coefficient of friction and weight of a body based on the force needed to move it up planes at different angles. Problem 6 asks about determining the horizontal force needed to raise a block using a wedge.Ad
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