Model question paper

M. S. RAMAIAH INSTITUTE OF TECHNOLOGY, BANGALORE 54 (Autonomous Institute, Affiliated to VTU)

DEPARTMENT OF INDUSTRIAL ENGINEERING & MANAGEMENT

MODEL QUESTION PAPER 1IM402 MACHINE TOOLS OPERATION

Time: 3 hrs

Max. Marks: 100

NOTE: 1) PART A is Compulsory

2) PART B Answer five full questions choosing one from each unitPART A

(OBJECTIVE TYPE) 25 MARKS1. In which of the following operation on lathe, the spindle speed will be minimum

a) Knurling (b) Fine finishing (c) Taper turning (d) Thread cutting

2. The usual ratio of forward & return stroke in shaper is

a) 2:1 (b) 1:2 (c) 3:2 (d) 3:1

3 Which of the following lathe operation requires that the cutting edge of a tool bit is placed exactly on the work-center linea) Boring (b) Facing (c) Drilling (d) Chamfering4. Flank wear occurs mainly on

a) nose part, from relief face & side face (b) nose part at top face (c) cutting edges

d) all the above

5 The characteristic that enables one material to cut another is

a) Toughness (b) Hardness (c) Ductility (d) Resilience6. The cutting tool used in spark erosion machining is

a) Arc (b) Capacitor (c) Electrode (d) Dielectric7 The machining process which uses abrasive slurry is

a) EDM (b) USM (c) PAM (d) LBM

8. The type of chip produced while machining cast iron

a) Continuous (b) Discontinuous (c) Continuous with BUE (d) None of the above

9. Which of the following is non chip removal process?a) Milling (b) spinning on lathe (c) Thread cutting (d) Grinding10. Which of the following abrasives is the hardest?a) Aluminum oxide (b) Silicon carbide (c) Cubic boron nitride (d) DiamondContdPage No.22

11 Drilling is an example of

a) Simple cutting (b) Uniform cutting (c) Oblique cutting (d) Intermittent cutting

12 The helical grooves which extend to full length of the drill bit is called as

a) Lip (b) Cutting edges (c) Flute (d) Shank13 Tool signatures comprises of

a) 4 elements (b) 8 elements (c) 7 elements (d) 6 elements

14 Tool cutting forces with increase in cutting speed

a) remains constant (b) increases (c) decreases (d) unpredicted

15 Chips are broken efficiently due to following property

a) Ductility (b) Elasticity (c) Toughness (d) Work hardening

16 The cutting tool in milling machine is mounted on

a) tool holder (b) arbor (c) spindle (d) column

17. Counter boring is the operation of

a) enlarging the end of a hole cylindrically (b) cone shaped enlargement of the hole c) sizing and finishing of hole (d) none of the above

18 It is required to index 119 divisions. It can be done by

a) simple indexing (b) direct indexing (c) compound indexing (d) differential indexing

19. Machinability depends on

a) microstructure, mechanical properties& composition of work piece (b) cutting force c) tool life (d) profile of work piece

20 Centering can be done more accurately by

a) 4 jaw chuck (b) 3 jaw chuck (c) collet chuck (d) magnetic chuck

21 In oblique cutting system, the chip thickness is

a. maximum at middle b. maximum at sides c. minimum at middle d. uniform

22 Negative rakes are used for

a) heavy loads (b) harder materials (c) carbide tools (d) all the above

23 The grit size of the abrasives used in grinding wheel is specified by

a) hardness number (b) size of wheel (c) mesh number (d) refractive index

24 In which of the milling operation maximum friction is caused

a) up milling (b) down milling (c) end milling (d) climb milling

25 In Taylors equation, value of index n is related to

a) work piece material (b) cutting tool material (c) working condition d) temperature of chip

ContdPage No.3