Machinist Paper 45

ITI Trade: Sample Question Paper (Machinist Paper 45)

Machinist Exam Paper, ITI Mechanical Group MCQ, ISRO Exam Questions

Part 45: List for questions and answers of Sample Question Paper Machinist

Q1. Predominant alloying element in stainless steel is

a) Cobalt

b) Manganese

c) Nickel

d) Chromium

Q2. The carbon content is high carbon steel is

a) More than 0.6%

b) More than 1.4%

c) More than 14%

d) More than 50%

Q3. Density of aluminium is

a) 1.6 g/cc

b) 2.7 g/cc

c) 4.5 g/cc

d) 8.2 g/cc

Q4. Select the change gears required to cut a 4-start thread having a pitch of 1.5mm. The lead screw has a pitch of 8mm

a) 45/60

b) 60/80

c) 70/90

d) 80/100

Q5. The angle for two flanks of buttress threads are

a) Both 29 degree

b) Both 12 degree

c) 7 degree and 45 degree

d) 20 degree and 29 degree

Q6. H7/k6 is a

a) Locational transition fit

b) Locational clearance fit

c) Locational interference fit

d) Medium drive fit

Q7. The Youngs modulus of steel is

a) 207 Gpa

b) 120 GPa

c) 70 Gpa

d) 50 Mpa

Q8. Crater wear occurs mainly due to

a) Abrasion

b) Diffusion

c) Oxidation

Q9. A milling cutter of 80mm diameter has nine teeth. It is used to mill a 240mm long work piece. The run over is 4mm and the depth of cut is 5mm. A cutting speed of 12 meters/min. and feed per tooth of 0.15mm has been selected. Determine the milling time.

a) 12.35 min

b) 1.18 min

c) 4.0 min

d) 23.5 min

Q10. Formula to calculate the value of setover using tailstock setover method to turn taper from diameter D to diameter d to a certain length l of a job (Total length of the job is L) is

a) 630 (D-d)/(2Lx1)

b) (D-d)/(2L)

c) (D-d)L/(2l)

d) (D-d)l/L

Q11. The value of side rake of the turning tool of geometry of 7-8-5-6-9-4-1 mm will be

a) 5 deg.

b) 8 deg.

c) 7 deg.

d) 9 deg.

Q12. Find the time requried for a slotting machine for making a complete cut on a plate 600×600 mm if the cutting speed is 8 meters/min, for the return time to cutting time ration 2:3 and feed 2mm/double stroke. Clearance at each end is 75 mm.

a) 4.6 min

b) 46 min

c) 92 min

d) 184 min

Q13.In a slotting machine, the cutting speed for a stroke length of 610 mm at 30 strokes per minute (return time to cutting time ration = 2:3) is

a) 30.5 m/min

b) 40 m/min

c) 50.3 m/min

d) 5.03 m/min

Q14. For Aluminium alloys, recommended rake angle for a milling cutter tool is

a) 14 degree

b) 12 degree

c) 0 degree

d) 30 degree

Q15. The quality of surface finish that can be achieved on a milling machine is

a) N4 to N11

b) N3 to N6

c) N2 to N4

d) N11 to N12

Q16. CNC Machines are best suited for _____ production

a) mass

b) one-off

c) batch

d) all of these

Q17. Circular profiels can be produced on a CNC using _____ code.

a) G09

b) G03

c) G08

d) G06

Q18. An ATC plays a significant role in reducing

a) Idle time

b) Tool time

c) Control time

d) Actual Time Cutting

Q19. CMM’ stands for

a) Computerized Measuring Machine

b) Computerized Milling Machine

c) Coordinate Measuring Machine

d) Computerized Material Management

Q20. The purpose of a feedback device in a CNC machine tool is to find

a) Speed

b) Displacement

c) Force

d) (a) and (b)

Part 45: List for questions and answers of Sample Question Paper