Engineering Physics Unit-3 Polarisation & LASER MCQ's

Last modified by Vishal E on 2019/02/15 15:54

BME Unit-3 Manufacturing Processes MCQ's

 1.  When thickness is more than 6mm it is called as
A)    Plate
B)    Sheet
C)    Anyone of a and b
D)    None of the above

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2.  When thickness is less than 6mm it is called as_
A)    Plate    
B)    Sheet    
C)    Anyone of a and b
D)    None of the above
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3.  Sheets are used to make ___________________
A)    Engine parts
B)    Turbine blades
C)    Car bodies
D)    None of the above

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4.  Sheets are used to make ___________________
A)    Boilers    
B)    Drinking cans
C)    Car bodies
D)    All of the above

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5.  Advantage of sheet metal __________________

A)    Light weight
B)    Good formability
C)    Low cost
D)    All of the above

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6.  Out of following are used in sheet metal
operation_______________________________
1.    Electrode    
2.    Die
3.    Punch    
4.    Hammer
          
A)    1, 2 and 3        
B)    2, 3 and 4        
C)    2 and 3 only        
D)    All of the above

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7.  The failure in sheet metal is of type __________
A)    Tensile    
B)    Compressive
C)    Shear    
D)    All of the above
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8.    In sheet metal working, shearing or cracking
    starts at ________________________________

A)    Contact surfaces
B)    Middle surface
C)    Both a and b
D)    None of the above
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9.    In a rectangular plate a circular hole is produced
    by  sheet  metal  operations.  If  remaining  of
    rectangular plate is used then the operation is __
A)    Blanking
B)    Piercing
C)    Perforating
D)    Notching
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10.    In a rectangular plate a circular hole is produced
    by sheet metal operations. If cut circular plate is
    used then the operation is  _________________
A)    Blanking
B)    Piercing
C)    Perforating
D)    Notching

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11.)    In a rectangular plate number of circular holes
    are  produced  by  sheet  metal  operations,  then
    operation is _____________________________
A)    Blanking
B)    Piercing
C)    Perforating
D)    Notching

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12.)    Cutting a metal sheet in a straight line is ______
A)    Blanking
B)    Piercing
C)    Slitting
D)    Notching

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13.)    Removing a small part from edge of the metal
    sheet is ________________________________
A)    Blanking
B)    Piercing
C)    Slitting
D)    Notching

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14.)    Cutting small portion of sheet and bending it is_
A)    Blanking
B)    Lancing
C)    Slitting
D)    Notching 

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15.    Springback is used in _____________________
A)    Blanking
B)    Bending
C)    Slitting
D)    Notching 

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16.    A cup can be formed by which of the following operation ______________________________ 

A)    Blanking
B)    Bending
C)    Drawing
D)    Notching
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17.    In sheet metal working, which of following is movable _______________________________ 

A)    Die
B)    Punch
C)    Both a and b
D)    None 

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18.    In simple die, how much numbers of operations are performed in one stroke? 

A)    One
B)    Two or More than two
C)    Many
D)    Can’t say 

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19.    In compound die, how many numbers of operations are performed in one stroke? 

A)    One
B)    Two or More than two
C)    Many
D)    Can’t say
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20.    In progressive die, number of operations are performed at ____________________________
A)    One station
B)    Two or More than two stations
C)    Many station
D)    Can’t say
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21.)    In sheet metal working, which of following is immovable _____________________________ 

A)    Die
B)    Punch
C)    Both a and b
D)    None 

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24.)    The shape in forging changed by ________force
A)    Tensile
B)    Compressive
C)    Shear
D)    All of the above 

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23.)    Material utilization is better in _____________ 

A)    Open die forging
B)    Closed die forging
C)    Both a and b
D)    Can’t say
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24.    Forged   components   are   ________________ compared to cast components 

A)    Stronger
B)    Weaker
C)    Can’t say
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25.    Grain structure of forged components is ______ 

A)    Aligned
B)    Random
C)    Can’t say 

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26.    Forging is related to ______________________ 

A)    Malleability
B)    Hardness
C)    Ductility
D)    Toughness 

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27.    If deformation is carried out above RCT, it is __ 

A)    Cold working
B)    Hot working
C)    Both a and b 

D)    None 

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28.    If deformation is carried out below RCT, it is __ 

A)    Cold working
B)    Hot working
C)    Both a and b
D)    None
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29. If the deformation is carried at 1000C, it is ____
A)    Cold working
B)    Hot working
C)    None
D)    Can’t say
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30. If the deformation is carried at 5000C, it is ____
A)    Cold working
B)    Hot working
C)    None
D)    Can’t say
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31.) If the deformation is carried at 00C, it is ______
A)    Cold working
B)    Hot working
C)    None
D)    Can’t say
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32.) Surface finish is good in __________________

A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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33.) Surface finish is poor in ___________________
A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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34. In Cold work, strength ___________________

A)    Increases
B)    Decreases
C)    Remains same
D)    None

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35. Dimesional accuracy is better in ___________
A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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36. Handling is difficult in ____________________
A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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37. Which is preferred for brittle materials _______
A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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38. Deformation of lead at room temperature is ___

A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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39. Deformation of tin at room temperature is ____
A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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40. Deformation of steel at room temperature is ___

A)    Hot working
B)    Cold working
C)    Both
D)    Can’t say
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41.) The connecting rod is produced by __________
A)    Casting
B)    Sheet metal
C)    Forging
D)    None of the above
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42.) The car body is produced by _______________

A)    Casting
B)    Sheet metal
C)    Forging
D)    None of the above
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43.) Shear on punch is provided to ______________
A) Easy removal
B) Reduce material
C)    Reduce capacity or press
D)    Reduce cutting force

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44. Draft on pattern is provided for _____________
A)    Allowance for machining
B)    Easy removal of pattern
C)    Compensation for shrinkage during
    solidification
D)    Compensation for shrinkage after
    solidification
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45. Shrinkage allowance on pattern is provided for_

A)    Compensation  for  finishing  operation  after completion of casting        
B)    Easy removal of casting        
C)    Compensation    for    shrinkage    during
    solidification            
D)    Compensation    for    shrinkage    after
    solidification            
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46. Riser is provided to ______________________

A)    Check whether mould cavity is completely
    filled
B)    Reduce impurities
C)    Store  molten  metal  to  compensate  for
    shrinkage during solidification
D)    All of these
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47. A prototype of a part to be casted which is used
to create cavity inside the sand mould is called _
A)    Pattern
B)    Cope
C)    Core
D)    Sprue
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48. Pattern can be made from _________________

A)    Wax    
B)    Plaster of Paris    
C)    Both (a) and (b)    
D)    None of the above    
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49. Core can be made from ___________________
A)    Wax    
B)    Plastic    
C)    Refractory material
D)    All of the above    
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50. The portion of mould which lies between sprue and gate is called ________________________
A)    Gate
B)    Runner
C)    Riser7
D)    Core
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51.) The portion of mould which lies between mould
cavity and runner is called _________________

A)    Gate
B)    Runner
C)    Riser
D)    Core
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52.) The vertical conical portion of mould through
which molten metal is poured is called _______
A)    Riser
B)    Sprue
C)    Runner
D)    Gate
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53.) Arrange the following parts of mould in correct
sequence as per path followed by molten metal_

A)    Cavity    B)Sprue C)  Gate
4.    Runner    5.Pouring basin
A)    5-3-2-4-1    
B)    5-2-4-3-1    
C)    1-5-2-4-3    
D)    5-4-2-3-1

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54. ‘Chill’ is used to ________________________

A)    Reduce washout of sand during pouring
B)    Increase cooling rate
C)    Reduce impurities
D)    Support core
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55. ‘Chaplet’ is used to ______________________
A)    Reduce washout of sand during pouring
B)    Increase cooling rate
C)    Reduce impurities
D)    Support core
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56. ‘Pads’ are used to ________________________    
A)    Reduce washout of sand during pouring
B)    Increase cooling rate
C)    Reduce    impurities
D)    Support    core
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57. ‘Skim bob’ is used to _____________________
A)    Reduce washout of sand during pouring
B)    Increase cooling rate
C)    Reduce impurities
D)    Support core

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58. Draft is provided on sprue to_______________
A)    Facilitate removal of casting
B)    Reduce aspiration effect
C)    Decrease turbulence of molten metal
D)    Reduce washout of sand during pouring
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59. ‘Core’ is used to _____________________
A)    Reduce aspiration effect
B)    Increase cooling rate
C)    Reduce    impurities
D)    To make hollow castings
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60. During  metal  pouring,  if  pressure  inside  the
mould cavity falls below atmospheric pressure,
the    outside phenomenon is called _____________________

A)    Aspiration effect
B)    Porosity
C)    Inhalation
D)    None
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61.) Aspiration effect is caused because of ________

A)    Sudden change in flow direction
B)    Straight sprue
C)    Sudden change in flow area
D)    All
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62.) An ability of sand to allow to escape entrapped
gases is called ___________________________
A)    Aspiration effect
B)    Permeability
C)    Permittivity
D)    Transmissibility
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63.) Green sand consists of ____________________
A)    Sand, copper sulphate, water
B)    Sand, graphite powder, water
C)    Sand, clay, water
D)    Sand, refractory powder, water
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64. Upper part of mould box is ________________
A)    Core
B)    Cope
C)    Drag
D)    Cap
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65. Lower part of mould box is ________________

A)    Base
B)    Cope
C)    Core
D)    None of these
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66. Identify  the    incorrect   statements   regarding
casting process __________________________
1.    Sand casting is inexpensive process as compared to
    most of other manufacturing process
2.    Surface finish is poor in sand casting as compared to
    most of other manufacturing process
3.    Sand  casting  cannot  be  used  to  create  products
    complicated shapes
4.    Gearbox casing manufactured using casting
5.    Exact dimensional tolerances can be achieved in sand
    casting    
6.    Material wastage in casting is high as compared to
    most of other manufacturing process
7.    Energy consumption in casting is high as compared to
    most of other manufacturing process
A)    1,3,5,6    
B)    1,2,4,7    
C)    3, 5,6    
D)    1, 3,4    

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67. Solidification time for riser should be ________

A)    Less than that of casting
B)    More than that of casting
C)    Same as that of casting
D)    It doesn’t    matter , It can be same, more or
    less    
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68. Molten metal is carried from furnace to mould
box by _________________________________
A)    Pouring cup
B)    Ladle
C)    Sprue
D)    None 

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69.    Which one of the following helps to escape air inside the mould cavity ___________________ 

A)    Permeability of sand
B)    Through Riser
C)    Vents provided in sand
D)    All of the above 

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70.    The place where casting process is being carried out is popularly known as _________________ 

A)    Furnace
B)    Foundry
C)    Workshop
D)    Smith’s Shop
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71.)    Arrange the following operations as per reverse
chronological sequence of casting ___________

1.    Metal melting and pouring
2.    Creation of mould
3.    Creation of pattern and  core
4.    Product Inspection
5.    Finishing the product to exact shape
6.    Cooling and solidification 

A)    3-2-1-6-5-4
B)    4-5-6-1-3-2
C)    4-5-6-1-2-3
D)    5-4-6-1-2-3
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72.)    Assertion(A): Riser is always through _______ 

Reason(R): Through riser allows gases entrapped in mould cavity to escape 

A)    Statement (A) is true but statement (R) is false
B)    Statement (R) is true but statement (A) is false
C)    Both statements are true but statement  (R) is not
    correct explanation of statement (A)
D)    Both statements are true and statement (R) is correct explanation of statement (A)
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73.)    Assertion(A): Solidification time of riser should be always more than that of casting __________ 

Reason(R): Riser should be able to supply molten metal till the end of solidification process 

A)    Statement (A) is true but statement (R) is false
B)    Statement (R) is true but statement (A) is false
C)    Both statements are true but statement (R) is not correct explanation of statement (A)
D)    Both statements are true and statement (R) is correct explanation of statement (A)
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74.    Assertion(A): Internal chills have to be made from same material as that of the castings _____ 

Reason(R): Internal chills cannot be taken out after the completion of solidification 

A)    Statement (A) is true but statement (R) is false
B)    Statement (R) is true but statement (A) is false
C)    Both statements are true but statement (R) is not correct explanation of statement (A)
D)    Both statements are true and statement (R) is correct explanation of statement (A) 

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75.    Size of casting is 10×15×20 cm, if the shrinkage allowance is 2% then size of pattern is _______ 

A)    100×150×200 mm
B)    102×153×204 mm
C)    98×147×196 mm
D)    None of these
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76.    Size of casting is 50×70×90 cm, if the machining allowance is 3% per dimension and if the shrinkage allowance is 7% then size of pattern is ______________________ 

A)    550×770×990 mm
B)    505×707×909 mm
C)    495×693×891 mm
D)    551×77A)5×992 mm
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77.    In welding process which of the following must present ________________________________ 

A)    Filler material
B)    Pressure
C)    Heat
D)    Both (A) and (C) 

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78.    In welding process, the heat required for welding is obtained from _________________ 

A)    Electric Energy
B)    Chemical Reaction
C)    Combustion of gases
D)    All of the above
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79. In ‘arc’ welding process, the heat required for

welding is obtained from __________________

A)    Electric Energy
B)    Chemical Reaction
C)    Combustion of gases
D)    All of the above
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80. Which one of the following is the requirement of
power supply of electric arc welding _______
A)    High voltage and high current
B)    High voltage and low current
C)    Low voltage and high current
D)    High voltage and high power
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81.) Arrange  the  following  processes  in  increasing
order of operating temperature ______________
1.    Sheet metal forming
2.    Hot working of steel
3.    Brazing
4.    Casting
5.    Soldering
6.    Welding


A)  1-3-5-6-2-4
B)  1-2-5-3-6-4
C)  1-5-3-2-6-4
D)  3-1-5-2-6-4

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8B) Typical operating current in electric arc welding
is _____________________________________
A)  100 to 500 mA
B)  1 to 5 A
C)  10 to 25 A
D)  Above 200 A

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8C) Typical operating voltage n electric arc welding
is _____________________________________

A)    20 to 40 V
B)  220 to 240 V
C)    420 to 440 V
D)  Above 1000 V

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84. Typical  operating  temperature  in  electric  arc

welding is ______________________________

A)    Below 5000C
B)    Around 15000C
C)    Around 50000C
D)    Above 100000C

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85. Flux  coating  is  provided  on  the  electrode  of
electric arc welding ______________________
A)    To protect electrode from corrosion
B)    To create shield gases during the welding
C)    To avoid electric shock to the operator
D)    To enhance heat produced during the
    welding
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86. In electric arc welding ____________________

A)    Positive  terminal  of  power  supply  is  connected  to
    work piece and negative terminal to electrode
B)    Negative terminal of power supply is connected to
    work piece and positive terminal to electrode
C)    Negative terminal of power supply is connected to
    electrode and work piece grounded
D)    It  doesn’t  matter  which  terminal  is  connected  to
    electrode as long as work piece is grounded
    

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87. Assertion(A):  In  electric  arc  welding  process
negative terminal of power supply is connected
to electrode _____________________________

Reason(R): Flow of electrons and hence arc will

be directed away from the negative terminal

A)    Statement (A) is true but statement (R) is false
B)    Statement (R) is true but statement (A) is false
C)    Both statements are true but statement    (R) is not
    correct explanation of statement (A)    
D)    Both statements are true and statement    (R) is correct
    explanation of statement (A)    
        

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88. Which of the following statements are incorrect
regarding electric arc welding ______________

1.    Two  joining  metals  never  melt  during the  welding
    process but only electrode melts    
2.    Electrode must be always in the contact of work piece
    during welding    
3.    Strength of welded joint is much less than strength of
    base metal    
4.    Welded joint changes the metallurgical properties of
    base metals    
  
A)    1,2,3    
B)    2,4    
C)    1, 2    
D)    None of the statement is incorrect
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89. Identify the correct statements regarding brazing
_______________________________________

1.    Brazed  joint  strengthens  slowly  as  compared  to
    welding and soldering
2.    Brazing can be used join metals as well as non-metals
3.    During brazing base metals are not melted
4.    During  brazing  molten  metal  flows  in  the  gap  by
    capillary action
5.    Brazed joint is thermally and electrically conductive 

A)    2,3,4
B)    1,2,4
C)    1, 3,4
D)    All statements are correct
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90.    In soldering ,composition of soldering wire is __ 

A)    63% tin, 37% lead
B)    37% tin, 63% lead
C)    63% tin, 37% zinc
D)    37% tin, 63% zinc
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91.)    Which of the following metal joining process is quickest in terms of molten metal solidification time? __________________________________ 

A)    Soldering
B)    Brazing
C)    Welding
D)    Can’t say 

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92.)    In which of the following metal joining process base metals are not melted? ________________ 

A)    Soldering
B)    Brazing
C)    Welding
D)    Both soldering and brazing
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93.)    Which of the following metal joining process produces strongest joint? __________________ 

A)    Soldering
B)    Brazing
C)    Welding
D)    Can’t say 

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94.    Assertion(A): In electric arc welding process electrode is coated with flux _______________ 

Reason(R): During welding the flux burns and creates protective shield of gases around the
weld pool avoiding formation brittle phases such
as metal oxides and nitrides    

A)    Statement (A) is true but statement (R) is false
B)    Statement (R) is true but statement (A) is false
C)    Both statements are true but statement    (R) is not
    correct explanation of statement (A)    
D)    Both statements are true and statement    (R) is correct
    explanation of statement (A)    
    

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References

  • Questions by Prof. Aniket Patil , SCOE, Pune
  • WikiNote Foundation 
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Created by Vishal E on 2019/02/15 15:54
    
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