Workshop Technology(Mechanical Engineering ) Questions and Answers

Question 1. The brass and bronze are welded by _________ flame.
  1.    Neutral
  2.    Oxidizing
  3.    Carburising
  4.    All of these
Explanation:-
Answer: Option B. -> Oxidizing
A slightly oxidizing flame is used in torch brazing of steel and cast iron. A stronger oxidizing flame is used in the welding of brass or bronze.
Question 2. In sheet metal blanking, shear is provided on punches and dies so that
  1.    Press load is reduced
  2.    Good cut edge is obtained
  3.    Warping of sheet is minimized
  4.    Cut blanks is straight
Explanation:-
Answer: Option A. -> Press load is reduced
In sheet metal blanking, shear is provided on punches and dies so that Press load is reduced
Question 3. In TIG arc welding, the welding zone is shielded by an atmosphere of
  1.    Helium gas
  2.    Argon gas
  3.    Either (A) or (B)
  4.    None of these
Explanation:-
Answer: Option C. -> Either (A) or (B)
In TIG arc welding, The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas argon or helium
Question 4. A gimlet is a ________ tool.
  1.    Boring
  2.    Marking
  3.    Cutting
  4.    None of these
Explanation:-
Answer: Option A. -> Boring
Gimlet is a small tool for boring holes, consisting of a shaft with a pointed screw at one end and a handle perpendicular to the shaft at the other
Question 5. For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
  1.    42 mm
  2.    44 mm
  3.    46 mm
  4.    48 mm
Explanation:-
Answer: Option C. -> 46 mm
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately 46 mm
Question 6. Acetylene gas is stored in cylinders in
  1.    Solid form
  2.    Gaseous form
  3.    Liquid form
  4.    Any one of these
Explanation:-
Answer: Option C. -> Liquid form
Acetylene gas is stored in cylinders in Liquid form
Question 7. Loam sand is a mixture of
  1.    30% sand and 70% clay
  2.    50% sand and 50% clay
  3.    70% sand and 30% clay
  4.    90% sand and 10% clay
Explanation:-
Answer: Option B. -> 50% sand and 50% clay
Loam sand is a mixture of 50% sand and 50% clay
Question 8. The operation of cutting of a flat sheet to the desired shape is called
  1.    Shearing
  2.    Piercing
  3.    Punching
  4.    Blanking
Explanation:-
Answer: Option D. -> Blanking
The operation of cutting of a flat sheet to the desired shape is called Blanking
Question 9. The blank diameter used in thread rolling will be
  1.    Equal to minor diameter of the thread
  2.    Equal to pitch diameter of the thread
  3.    A little larger than the minor diameter of the thread
  4.    A little larger than the pitch diameter of the thread
Explanation:-
Answer: Option C. -> A little larger than the minor diameter of the thread
The blank diameter used in thread rolling will be A little larger than the minor diameter of the thread
Question 10. Green sand is a mixture of
  1.    30% sand and 70% clay
  2.    50% sand and 50% clay
  3.    70% sand and 30% clay
  4.    90% sand and 10% clay
Explanation:-
Answer: Option C. -> 70% sand and 30% clay
Green sand is a mixture of 70% sand and 30% clay
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