1. The Lathe Centres are provided with standard taper known as:
A) Brown and sharp taper
B) Morse taper
C) seller’s taper
D) Brown taper
Ans:- B) Morse taper
2. The chuck used for setting up of heavy and irregular shaped work should be:
A) Four jaw independent chuck
B) Three jaw universal chuck
C) magnetic chuck
D) Collet chuck
Ans:- A) Four jaw independent chuck
3. The Chamfaring is an essential operation after:
A) .25 mm
B) .1 mm
C) .5 mm
D) .2 mm
Ans:- D) .2 mm
4. The heat treatment process for softening hardened steel is:
A) Carburising
B) Normalising
C) Annealing
D) Tempering
Ans:- C) Annealing
5. The heat treatment process for softening hardened steel is:
A) Carburising
B) Normalising
C) Annealing
D) Tempering
Ans:- C) Annealing
6. Steel containing 0.8 to 1.5% carbon is known as:
A) Mild Steel
B) High carbon Steel
C) Dead Mild Steel
D) Medium carbon
Ans:- B) High carbon Steel
7.A lathe with four steps on the cone pulley and with back gears will have:
A) Four direct speeds
B) Four indirect speeds
C) Four direct and four indirect speeds
D) Eight indirect speeds
Ans:- C) Four direct and four indirect speeds
8. Least count vernier caliper metric is:
A) 0.02 mm
B) 0.01 mm
C) 0.00001 mm
D) 0.0004 mm
Ans:- A) 0.02 mm
9. for turning internal tapers, the suitable method is:
A) by setting over the tail stock
B) by a form tool
C) by a taper turning attachment method
D) none
Ans:- C) by a taper turning attachment method
10. The percentage of carbon incast iron varies from:
A) 0.1 to 0.5
B) 0.5 to 1
C) 1.7 to 4.5
D) 0.2 to 3
Ans:- C) 1.7 to 4.5
11.The correct order of increasing hot hardness of cutting tool materials:
A) Diamond, Carbide, High speed steel
B) carbide, Diamond, High speed steel
C) High speed, Carbide, Diamond
D) None
Ans:- D) None
12. American national standard thread is:
A) 58*
B) 65*
C) 47*
D) 60*
Ans:- D) 60*
13. A single point thread cutting tool should ideally have:
A) Point angle
B) Zero rake angle
C) Positive rake angle
D) Negative rake angle
Ans:- B) Zero rake angle
14. The alloy, mainly used for corrosion resistance in stainless is
A) Manganese
B) silicon
C) carbon
D) Chromium
Ans:- D) Chromium
15. The heat treatment process used for casting is:
A) Normalising
B) Annealing
C) Temperring
D) Carburising
Ans:- A) Normalising
16. The taper on the lathe spindle is:
A) 2 to 20
B) 3 to 20
C) 1 in 20
D) 4 in 20
Ans:- C) 1 in 20
17. Tumbler gears in lathe are used to
A) Cut gears
B) Cut taper
C) Reduce the spindle speed
D) Give desired direction of movement to the lathe carriage
Ans:- D) Give desired direction of movement to the lathe carriage
18. In which, Coolant is used for Aluminium turning:
A) Dry
B) Kerosene
C) Soda water
D) lard oil
Ans:- B) Kerosene
19. The cutting speed for drilling copper wiyh high speed steel drill varies from:
A) 18 to 30 m/m
B) 8 to 15 m/min
C) 30 to 45 m/min
D) 10 to m/min
Ans:- C) 30 to 45 m/min
20. The blade of power saw is made of:
A) cast Iron
B) Aluminium
C) High speed steel
D) High carbon steel
Ans:- C) High speed steel
21.British association thread angles is:
A) 37*
B) 27*
C) 57*
D) 47 1/2*
Ans:- D) 47 1/2*
22. the material commonly used for machine bodies is:
A) cast Iron
B) Aluminium
C) Brass
D) Mild Steel
Ans:- A) cast Iron
23. Acme screw thread angles is:3
A) 49*
B) 29*
C) 39*
D) 19*
Ans:- B) 29*
24. Which coolant is used for mild steel for Lapping?
A) Kerosene
B) Turpentine
C) lard oil
D) Dry
Ans:- C) lard oil
25. Which of the following material have maximum malleability?
A) Soft steel
B) Copper
C) cast iron
D) Lead
Ans:- D) Lead
26.Angle of B.S.W. thread is:
A) 50*
B) 53*
C) 55*
D) 60*
Ans:- C) 55*
27. Which of the following is a mesomorphous material?
A) Silver
B) Lead
C) Brass
D) Mica
Ans:- D) Mica
28.High speed steel temperature is:
A) 900*C
B) 100*
C) 300*
D) 2600*
Ans:- A) 900*C
29. What is cutting ‘Feed’?
A) Tool advance for 2 minute
B) Tool advance for 3 minute
C) Tool advance for 4 minute
D) Tool advance for one rotaion
Ans:- D) Tool advance for one rotaion
30. What is lip angle?
A) 20* to 40*
B) 30* to 50*
C) 60* to 80*
D) 80* to 120*
Ans:- Update soon
31. An Alloy of copper, tin and zine is known as:
A) Brass
B) Gum metal
C) Bronze
D) cast iron
Ans:- B) Gum metal
32. What is cutting speed?
A) Tool advance for work in one minute
B) Tool advance for 3 minute
C) tool advance for 2 minute
D) Tool advance for one ratation
Ans:- A) Tool advance for work in one minute
33. Discontinuous chip are formed during machining of:
A) Brittle metals
B) hard metals
C) Soft metals
D) hard and soft metals
Ans:- A) Brittle metals
34.The angle made by the face of the tool and the plane parallel to the base of cutting tool is called:
A) Cutting angle
B) Lip angle
C) Rake angle
D) Clearance angle
Ans:- C) Rake angle
35. The lower critical point for all steel is:
A) 623*C
B) 723*C
C) 913*C
D) 523*C
Ans:- B) 723*C
36.Combination central drill angle is:
A) 55*
B) 118*
C) 29*
D) 60*
Ans:- D) 60*
37.Carbide tipped tools usually have:
A) Any rake angle
B) Positive rake angle
C) Negative rake angle
D) No rake angle
Ans:- C) Negative rake angle
38. Hard and tough materials like cast iron should be turned at:
A) Slow speed
B) High speed
C) Any speed
D) Very high speed
Ans:- A) Slow speed
39. Ceramic tools are fixed to tool body by:
A) Soldering
B) brazing
C) welding
D) clamping
Ans:- D) clamping
40. For machining a mild steel work piece using carbide tool, the maximum material will be removed at a temperature of:
A) 200*C
B) 300*C
C) 175*C
D) 100*C
Ans:- D) 100*C
41. lathe centrers angles is:
A) 55*
B) 65*
C) 60*
D) 70*
Ans:- C) 60*
42.Crater wear is predominant in:
A) Tungsten carbide tools
B) carbon tool steels
C) High speed steel
D) carbon tip tool
Ans:- A) Tungsten carbide tools
43. Which type of tools are used on Lathe shapper and planer?
A) Two point cutting tool
B) Three point cuttong tool
C) Multi point cutting tool
D) Single point cutting tool
Ans:- D) Single point cutting tool
44. Twist drill standered cutting angle is:
A) 90*
B) 55*
C) 118*
D) 60*
Ans:- C) 118*
45. The awing diameter over the bed is_______the height of the centre measured from the bed of the lathe.
A) Equal to
B) Twice
C) Thrice
D) One half
Ans:- B) Twice
46. The diamond tool material at temerature upto:
A) 1650*C
B) 1300*C
C) 1200*C
D) 1400*C
Ans:- A) 1650*C
47. The chuck preferred for quick setting and accurate centering of a job is:
A) Four jaw independent chuck
B) Collect chuck
C) magnetic chuck
D) Three jaw universal chuck
Ans:- B) Collect chuck
48. The cutting fluid mostly used for machining steel is:
A) Water
B) Dry
C) Heavy oil
D) Soluble oil
Ans:- D) Soluble oil
49. The point of a drill, for drilling stainless steel is:
A) 90*
B) 118*
C) 135*
D) 150*
Ans:- C) 135*
50.The steel widely used for making precision measuring instruments is:
A) Nickel steel
B) Nickel-Chromium steel
C) High speed steel
D) High carbon steel
Ans:- A) Nickel steel
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| ७ वी (7th) | दहावी (SSC) | बारावी (HSC) | डिप्लोमा | आय.टी.आय | पदवी |
| पदव्युत्तर शिक्षण | बी.एड | एम.एड | एल.एल.बी / एल.एल.एम | बीएससी | एमबीए |
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| बी.टेक | एम.टेक | MS-CIT | |||
