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

1. 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 doesn’t 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

2. a) two endpoints only b) centre & radius
c)radius & one endpoint d)two endpoint & centre