Manufacturing & Production Engineering 1000+ MCQ with answer for NMAT
Thursday 9th of March 2023
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1. Ultrasonic machining is best suited for
A. Tool steels
B. Sintered carbides
C. Glass
D. All of these
Answer : D
A. Tool steels
B. Sintered carbides
C. Glass
D. All of these
Answer : D
2. What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?
A. Torch brazing
B. Dip brazing
C. Resistance brazing
D. Furnace brazing
Answer : A
A. Torch brazing
B. Dip brazing
C. Resistance brazing
D. Furnace brazing
Answer : A
3. In lapping operation, the amount of metal removed is
A. 0.005 to 0.01 mm
B. 0.01 to 0.1 mm
C. 0.05 to 0.1 mm
D. 0.5 to 1 mm
Answer : A
A. 0.005 to 0.01 mm
B. 0.01 to 0.1 mm
C. 0.05 to 0.1 mm
D. 0.5 to 1 mm
Answer : A
4. The effect of setting a boring tool above centre height leads to
A. Increase in the effective rake angle and a decrease in the effective clearance angle
B. Increase in both effective rake angle and effective clearance angle
C. Decrease in the effective rake angle and an increase in the effective clearance angle
D. Decrease in both effective rake angle and effective clearance angle
Answer : A
A. Increase in the effective rake angle and a decrease in the effective clearance angle
B. Increase in both effective rake angle and effective clearance angle
C. Decrease in the effective rake angle and an increase in the effective clearance angle
D. Decrease in both effective rake angle and effective clearance angle
Answer : A
5. The addition of lead, sulphur and phosphorus to low carbon steels, help to
A. Reduce built up edge
B. Break up chips
C. Improve machinability
D. All of these
Answer : D
A. Reduce built up edge
B. Break up chips
C. Improve machinability
D. All of these
Answer : D
6. The factor which affects the tool life is
A. Tool geometry
B. Cutting speed
C. Feed rate
D. All of these
Answer : D
A. Tool geometry
B. Cutting speed
C. Feed rate
D. All of these
Answer : D
7. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
A. Porosity
B. Undercut
C. Under fill
D. Crack
Answer : B
A. Porosity
B. Undercut
C. Under fill
D. Crack
Answer : B
8. The saw milling is an operation of
A. Producing grooves around the periphery of a cylindrical or conical workpiece
B. Producing narrow slots or grooves on a workpiece
C. Reproduction of an outline of a template on a workpiece
D. Machining several surfaces of a workpiece simultaneously
Answer : B
A. Producing grooves around the periphery of a cylindrical or conical workpiece
B. Producing narrow slots or grooves on a workpiece
C. Reproduction of an outline of a template on a workpiece
D. Machining several surfaces of a workpiece simultaneously
Answer : B
9. In hot machining, the work is heated by
A. Simple heating
B. Flame heating
C. Induction heating
D. Any one of these
Answer : D
A. Simple heating
B. Flame heating
C. Induction heating
D. Any one of these
Answer : D
10. An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as
A. Counter-boring
B. Grooving
C. Knurling
D. Facing
Answer : C
A. Counter-boring
B. Grooving
C. Knurling
D. Facing
Answer : C
11. As the cutting speed increases, the tool cutting forces
A. Remain constant
B. Increases
C. Decreases
D. First increases and then decreases
Answer : C
A. Remain constant
B. Increases
C. Decreases
D. First increases and then decreases
Answer : C
12. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
A. Carburizing flame
B. Oxidizing flame
C. Oxy-acetylene flame
D. Neutral flame
Answer : D
A. Carburizing flame
B. Oxidizing flame
C. Oxy-acetylene flame
D. Neutral flame
Answer : D
13. 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
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
14. If the cutting speed is increased, then the built-up-edge
A. Becomes longer
B. May or may not form
C. Becomes smaller and finally does not form at all
D. Has nothing to do with speed
Answer : C
A. Becomes longer
B. May or may not form
C. Becomes smaller and finally does not form at all
D. Has nothing to do with speed
Answer : C
15. In electro-discharge machining, dielectric is used to
A. Help in the movement of the sparks
B. Control the spark discharges
C. Act as coolant
D. All of these
Answer : D
A. Help in the movement of the sparks
B. Control the spark discharges
C. Act as coolant
D. All of these
Answer : D
16. The lip angle is the angle
A. Between the tool face and the ground end surface of flank
B. Made by the face of the tool and the plane parallel to the base of the cutting tool
C. Between the face of the tool and a line tangent to the machined surface at the cutting point
D. None of the above
Answer : A
A. Between the tool face and the ground end surface of flank
B. Made by the face of the tool and the plane parallel to the base of the cutting tool
C. Between the face of the tool and a line tangent to the machined surface at the cutting point
D. None of the above
Answer : A
17. In centreless grinders, the regulating wheel is inclined at
A. 0° to 8°
B. 9° to 15°
C. 16° to 20°
D. 21° to 25°
Answer : A
A. 0° to 8°
B. 9° to 15°
C. 16° to 20°
D. 21° to 25°
Answer : A
18. The lip clearance angle is the angle formed by the
A. Leading edge of the land with a plane having the axis of the drill
B. Flank and a plane at right angles to the drill axis
C. Chisel edge and the lip as viewed from the end of a drill
D. None of the above
Answer : B
A. Leading edge of the land with a plane having the axis of the drill
B. Flank and a plane at right angles to the drill axis
C. Chisel edge and the lip as viewed from the end of a drill
D. None of the above
Answer : B
19. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C
20. A bottoming tap has
A. Its end tapered for about three or four threads
B. Its end tapered for about eight or ten threads
C. Full threads for the whole of its length
D. None of the above
Answer : C
A. Its end tapered for about three or four threads
B. Its end tapered for about eight or ten threads
C. Full threads for the whole of its length
D. None of the above
Answer : C
21. In centre less grinders, the maximum angular adjustment of the regulating wheel is
A. 5°
B. 10°
C. 15°
D. 20°
Answer : B
A. 5°
B. 10°
C. 15°
D. 20°
Answer : B
22. The type of reamer used for reaming soft aluminium or copper, is
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : B
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : B
23. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
A. Cutting speed
B. Feed rate
C. Shear angle
D. Tool geometry
Answer : C
A. Cutting speed
B. Feed rate
C. Shear angle
D. Tool geometry
Answer : C
24. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
A. 3500?C
B. 3200?C
C. 2900?C
D. 2550?C
Answer : B
A. 3500?C
B. 3200?C
C. 2900?C
D. 2550?C
Answer : B
25. The helix angle of a drill is __________ for drilling brass.
A. Equal to 30°
B. Less than 30°
C. More than 30°
D. None of these
Answer : B
A. Equal to 30°
B. Less than 30°
C. More than 30°
D. None of these
Answer : B
26. The type of reamer used for reaming operation in a blind hole, is
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : C
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
Answer : C
27. Which of the following statement is correct for orthogonal cutting system?
A. The cutting edge of the tool is perpendicular to the direction of tool travel.
B. The cutting edge clears the width of the workpiece on either ends.
C. The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
D. All of the above
Answer : D
A. The cutting edge of the tool is perpendicular to the direction of tool travel.
B. The cutting edge clears the width of the workpiece on either ends.
C. The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
D. All of the above
Answer : D
28. The effective number of lattice points in the unit cell of simple cubic, body centred cubic, and face centred cubic space lattices, respectively, are
A. 1, 2, 2
B. 1, 2, 4
C. 2, 3, 4
D. 2, 4, 4
Answer : B
A. 1, 2, 2
B. 1, 2, 4
C. 2, 3, 4
D. 2, 4, 4
Answer : B
29. The point angle of a drill, for drilling stainless steel, is
A. 90°
B. 118°
C. 135°
D. 150°
Answer : C
A. 90°
B. 118°
C. 135°
D. 150°
Answer : C
30. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
A. 3.75 m/min
B. 5 m/min
C. 7.5 m/min
D. 15 m/min
Answer : C
A. 3.75 m/min
B. 5 m/min
C. 7.5 m/min
D. 15 m/min
Answer : C
31. 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
A. Internal tapers
B. Small tapers
C. Long slender tapers
D. Steep tapers
Answer : C
32. In drilling softer materials, the cutting speed is _________ as compared to harder materials.
A. Same
B. Low
C. High
D. None of these
Answer : C
A. Same
B. Low
C. High
D. None of these
Answer : C
33. 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
A. Rake angles
B. Relief angles
C. Face angles
D. None of these
Answer : B
34. In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A. Fusion
B. Reverse polarity
C. Forward welding
D. Direct polarity
Answer : B
A. Fusion
B. Reverse polarity
C. Forward welding
D. Direct polarity
Answer : B
35. In a shaper
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : B
A. Tool is stationary and work reciprocates
B. Work is stationary and tool reciprocates
C. Tool moves over stationary work
D. Tool moves over reciprocating work
Answer : B
36. In electro discharge machining, tool is made of
A. Brass
B. Copper
C. Copper tungsten alloy
D. All of these
Answer : D
A. Brass
B. Copper
C. Copper tungsten alloy
D. All of these
Answer : D
37. Misrun is a casting defect which occurs due to
A. Very high pouring temperature of the metal
B. Insufficient fluidity of the molten metal
C. Absorption of gases by the liquid metal
D. Improper alignment of the mould flasks
Answer : B
A. Very high pouring temperature of the metal
B. Insufficient fluidity of the molten metal
C. Absorption of gases by the liquid metal
D. Improper alignment of the mould flasks
Answer : B
38. Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer using the given codes.
A. P-2, Q-1, R-4, S-5
B. P-4, Q-2, R-3, S-5
C. P-4, Q-5, R-1, S-2
D. P-3, Q-5, R-2, S-1
Answer : D
| List-I (Equipment) | List-II (Process) |
|---|---|
| P. Hot Chamber Machine | 1. Cleaning |
| Q. Muller | 2. Core making |
| R. Dielectric Baker | 3. Die casting |
| S. Sand Blaster | 4. Annealing |
| . | 5. Sand mixing |
A. P-2, Q-1, R-4, S-5
B. P-4, Q-2, R-3, S-5
C. P-4, Q-5, R-1, S-2
D. P-3, Q-5, R-2, S-1
Answer : D
39. 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
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
D. Jig boring machine
Answer : A
40. When the temperature of a solid metal increases,
A. Strength of the metal decreases but ductility increases
B. Both strength and ductility of the metal decreases
C. Both strength and ductility of the metal increases
D. Strength of the metal increases but ductility decreases
Answer : A
A. Strength of the metal decreases but ductility increases
B. Both strength and ductility of the metal decreases
C. Both strength and ductility of the metal increases
D. Strength of the metal increases but ductility decreases
Answer : A
41. The percentage of carbon in gray cast iron is in the range of
A. 0.25 to 0.75 percent
B. 1.25 to 1.75 percent
C. 3 to 4 percent
D. 8 to 10 percent
Answer : C
A. 0.25 to 0.75 percent
B. 1.25 to 1.75 percent
C. 3 to 4 percent
D. 8 to 10 percent
Answer : C
42. Shrinkage allowance on pattern is provided to compensate for shrinkage when
A. The temperature of liquid metal drops from pouring to freezing temperature
B. The metal changes from liquid to solid state at freezing temperature
C. The temperature of solid phase drops from freezing to room temperature
D. The temperature of metal drops from pouring to room temperature
Answer : C
A. The temperature of liquid metal drops from pouring to freezing temperature
B. The metal changes from liquid to solid state at freezing temperature
C. The temperature of solid phase drops from freezing to room temperature
D. The temperature of metal drops from pouring to room temperature
Answer : C
43. In oblique cutting of metals, the cutting edge of the tool is
A. Perpendicular to the workpiece
B. Perpendicular to the direction of tool travel
C. Parallel to the direction of tool travel
D. Inclined at an angle less than 90° to the direction of tool travel
Answer : D
A. Perpendicular to the workpiece
B. Perpendicular to the direction of tool travel
C. Parallel to the direction of tool travel
D. Inclined at an angle less than 90° to the direction of tool travel
Answer : D
44. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
A. 0.20
B. 0.30
C. 0.50
D. 0.60
Answer : C
A. 0.20
B. 0.30
C. 0.50
D. 0.60
Answer : C
45. Crater wear is mainly due to the phenomenon known as
A. Adhesion of metals
B. Oxidation of metals
C. Diffusion of metals
D. All of these
Answer : C
A. Adhesion of metals
B. Oxidation of metals
C. Diffusion of metals
D. All of these
Answer : C
46. Quality screw threads are produced by
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Answer : D
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Answer : D
47. Which of the following statement is wrong?
A. The larger side rake angle produces chipping.
B. The smaller rake angle produces excessive wear and deformation in tool.
C. The side cutting edge angle (less than 15°) increases tool life.
D. The increase in nose radius decreases tool life.
Answer : D
A. The larger side rake angle produces chipping.
B. The smaller rake angle produces excessive wear and deformation in tool.
C. The side cutting edge angle (less than 15°) increases tool life.
D. The increase in nose radius decreases tool life.
Answer : D
48. In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called
A. Face
B. Fillet
C. Land
D. Lead
Answer : A
A. Face
B. Fillet
C. Land
D. Lead
Answer : A
49. The average cutting speed for turning brass with a high speed steel tool is
A. 15 to 19 m/min
B. 25 to 31 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
Answer : C
A. 15 to 19 m/min
B. 25 to 31 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
Answer : C
50. The operation of smoothing and squaring the surface around a hole is known as
A. Counter-sinking
B. Counter-boring
C. Trepanning
D. Spot facing
Answer : D
A. Counter-sinking
B. Counter-boring
C. Trepanning
D. Spot facing
Answer : D
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