1000+ Manufacturing & Production Engineering Multiple Choice Question Answer [Solved]

1. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
A. Adjusting the current
B. Adjusting the duration of current
C. Changing the electrode size
D. Changing the electrode coating
Answer : C

2. The cutting speed of a drill depends upon the
A. Material of drill
B. Type of material to be drilled
C. Quality of surface finish desired
D. All of these
Answer : D

3. A ring gauge is used to measure
A. Outside diameter but not roundness
B. Roundness but not outside diameter
C. Both outside diameter and roundness
D. Only external threads
Answer : A

4. The cutting force in up milling __________ per tooth movement of the cutter.
A. Is zero
B. Is maximum
C. Decreases from maximum to zero
D. Increases from zero to maximum
Answer : D

5. In which of the following machine, the work rotates and the tool is stationary?
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
D. Jig boring machine
Answer : A

6. Twist drills are made of
A. High speed steel
B. Carbon steel
C. Stainless steel
D. Either (A) or (B)
Answer : D

7. Which of the following statement is wrong as regard to down milling?
A. It can not be used on old machines due to backlash between the feed screw of the table and the nut.
B. The chips are disposed off easily and do not interfere with the cutting.
C. The surface milled appears to be slightly wavy.
D. The coolant can be poured directly at the cutting zone where the cutting force is maximum.
Answer : C

8. The type of tool used on lathe, shaper and planer is
A. Single point cutting tool
B. Two point cutting tool
C. Three point cutting tool
D. Multipoint cutting tool
Answer : A

9. Match the following metal forming processes with their associated stresses in the work piece.

Metal forming process	Types of stress
1. Coining	P. Tensile
2. Wire Drawing	Q. Shear
3. Blanking	R. Tensile and compressive
4. Deep Drawing	S. Compressive

A. 1-S, 2-P, 3-Q, 4-R
B. 1-S, 2-P, 3-R, 4-Q
C. 1-P, 2-Q, 3-S, 4-R
D. 1-P, 2-R, 3-Q, 4-S
Answer : A

10. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?
A. Distortion
B. Warping
C. Porous weld
D. Poor fusion
Answer : D

11. The grade of grinding wheel depends upon
A. Hardness of the material being ground
B. Speed of wheel and work
C. Condition of grinding machine
D. All of these
Answer : D

12. The taper on the lathe spindle is
A. 1 in 10
B. 1 in 15
C. 1 in 20
D. 1 in 30
Answer : C

13. In machining metals, chips break due to __________ of work material.
A. Toughness
B. Ductility
C. Elasticity
D. Work hardening
Answer : D

14. Continuous chips with built up edge are formed during machining of
A. Brittle metals
B. Ductile metals
C. Hard metals
D. Soft metals
Answer : B

15. The chamfering is an operation of
A. Bevelling the extreme end of a workpiece
B. Embossing a diamond shaped pattern on the surface of a workpiece
C. Reducing the diameter of a workpiece over a very narrow surface
D. Enlarging the end of a hole cylindrically
Answer : A

16. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
A. Helix or rake angle
B. Point angle
C. Chisel edge angle
D. Lip clearance angle
Answer : C

17. The tail stock set over method of taper turning is preferred for
A. Internal tapers
B. Small tapers
C. Long slender tapers
D. Steep tapers
Answer : C

18. The lip angle of a single point tool is usually
A. 20° to 40°
B. 40° to 60°
C. 60° to 80°
D. None of these
Answer : C

19. Cast iron during machining produces
A. Continuous chips
B. Discontinuous chips
C. Continuous chips with built-up edge
D. None of these
Answer : B

20. Quality screw threads are produced by
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Answer : D

21. The silicon carbide abrasive is chiefly used for grinding
A. Cemented carbide
B. Ceramic
C. Cast iron
D. All of these
Answer : D

22. Cold working of steel is defined as working
A. At its recrystallisation temperature
B. Above its recrystallisation temperature
C. Below its recrystallisation temperature
D. At two thirds of the melting temperature of the metal
Answer : C

23. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.
A. Soft grade
B. Medium grade
C. Hard grade
D. None of these
Answer : A

24. The hardness of a grinding wheel is determined by the
A. Hardness of abrasive grains
B. Ability of the bond to retain abrasives
C. Hardness of the bond
D. Ability of the grinding wheel to penetrate the work piece
Answer : B

25. Volume of a cube of side l and volume of a sphere of radius r are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is
A. (4?/6)³ × (r/l)?
B. (4?/6) × (r/l)²
C. (4?/6)² × (r/l)³
D. (4?/6)² × (r/l)?
Answer : D

26. Trepanning is an operation of
A. Making a cone-shaped enlargement of the end of a hole
B. Smoothing and squaring the surface around a hole
C. Sizing and finishing a small diameter hole
D. Producing a hole by removing metal along the circumference of a hollow cutting tool
Answer : D

27. Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 ?m and current flow time of 0.2 second, heat generated during the process will be
A. 0.2 Joule
B. 1 Joule
C. 5 Joule
D. 1000 Joule
Answer : D

28. In order to obtain a surface finish in the range of 0.75 ?m to 1.25 ?m , the operation used is called.
A. Grinding
B. Lapping
C. Honing
D. Buffing
Answer : A

29. Tool life is generally better when
A. Grain size of the metal is large
B. Grain size of the metal is small
C. Hard constituents are present in the microstructure of the tool material
D. None of the above
Answer : A

30. Internal or external threads of different pitches can be produced by
A. Pantograph milling machine
B. Profiling machine
C. Planetary milling machine
D. Piano miller
Answer : C

31. The abrasive slurry used in ultrasonic machining contains fine particles of
A. Aluminium oxide
B. Boron carbide
C. Silicon carbide
D. Any one of these
Answer : D

32. The factor responsible for the formation of continuous chips with built up edge is
A. Low cutting speed and large rake angle
B. Low cutting speed and small rake angle
C. High cutting speed and large rake angle
D. High cutting speed and small rake angle
Answer : B

33. For generating a Coons surface we require
A. A set of grid points on the surface
B. A set of grid control points
C. Four bounding curves defining the surface
D. Two bounding curves and a set of grid control points
Answer : C

34. Segmental chips are formed during machining
A. Mild steel
B. Cast iron
C. High speed steel
D. High carbon steel
Answer : B

35. Hot rolling of mild steel is carried out
A. At recrystallization temperature
B. Between 100?C to 150?C
C. Between recrystallization temperature
D. Above recrystallization temperature
Answer : D

36. The grooving is an operation of
A. Bevelling the extreme end of a workpiece
B. Embossing a diamond shaped pattern on the surface of a workpiece
C. Reducing the diameter of a workpiece over a very narrow surface
D. Enlarging the end of a hole cylindrically
Answer : C

37. In up-cut milling the work piece is fed
A. Against the rotating cutter
B. At angle of 60° to the cutter
C. In the direction of the cutter
D. At the right angle to the cutter
Answer : A

38. In a shaper, the metal is removed during
A. Forward stroke
B. Return stroke
C. Both the forward and return strokes
D. Neither the forward nor the return stroke
Answer : A

39. The example of snag grinding is
A. Trimming the surface left by sprues and risers on castings
B. Grinding the parting line left on castings
C. Removing flash on forgings
D. All of these
Answer : D

40. High speed steel tools retain their hardness upto a temperature of
A. 250°C
B. 350°C
C. 500°C
D. 900°C
Answer : D

41. In metal machining, the work-tool contact zone is a zone where heat is generated due to
A. Plastic deformation of metal
B. Burnishing friction
C. Friction between the moving chip and the tool face
D. None of the above
Answer : B

42. The ductile materials, during machining, produce
A. Continuous chips
B. Discontinuous chips
C.Continuous chips with built up edge
D. Either (A) or (C)
Answer : D

43. NC contouring is an example of
A. Continuous path positioning
B. Point-to-point positioning
C. Absolute positioning
D. Incremental positioning
Answer : A

44. Ceramic cutting tools are
A. Made by cold pressing of aluminium oxide powder
B. Available in the form of tips
C. Brittle and have low bending strength
D. All of these
Answer : D

45. In order to prevent tool from rubbing the work _________ on tools are provided.
A. Rake angles
B. Relief angles
C. Face angles
D. None of these
Answer : B

46. Down milling is also called
A. Conventional milling
B. Climb milling
C. End milling
D. Face milling
Answer : B

47. What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
A. Reactor
B. Kerf
C. Inductor
D. Cone
Answer : C

48. Side relief angle of a single point tool is the angle
A. By which the face of the tool is inclined towards back
B. By which the face of the tool is inclined sideways
C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool
D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
Answer : C

49. Flank wear occurs mainly on the
A. Nose part, front relief face and side relief face of the cutting tool
B. Face of the cutting tool at a short distance from the cutting edge
C. Cutting edge only
D. Front face only
Answer : A

50. The primary purpose of a sprue in a casting mould is to
A. Feed the casting at a rate consistent with the rate of solidification.
B. Act as a reservoir for molten metal
C. Feed molten metal from the pouring basin to the gate
D. Help feed the casting until all solidification takes place
Answer : C