Manufacturing Process Objective Type Questions with Answers(PDF)
Manufacturing Process Objective Type Questions with Answers(PDF) for Mechanical and Power Engineer
1. The teeth of hacksaw blade are bent
(A) Towards right
(B) Towards left
(C) Alternately towards right and left and every third or fourth left straight (Answer)
(D) May be bent in any direction
2. Loam sand is a mixture of
(A) 30% sand and 70% clay
(B) 50% sand and 50% clay (Answer)
(C) 70% sand and 30% clay
(D) 90% sand and 10% clay
3. The advantage of Thermit welding is that
(A) All parts of the weld section are molten at the same time
(B) Weld cools almost uniformly
(C) Results in a minimum problem with internal residual stresses
(D) All of the above (Answer)
4. Which one of the following material will require the largest size of riser for the same size of casting?
(A) Aluminium
(B) Cast iron
(C) Steel (Answer)
(D) Copper
5. The welding process used in joining mild steel shanks to high speed drills, is
(A) Spot welding
(B) Seam welding
(C) Flash butt welding (Answer)
(D) Upset butt welding
6. When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
(A) Die casting method
(B) Slush casting method
(C) Permanent mould casting method (Answer)
(D) Centrifugal casting method
7. Lancing is the operation of
(A) Cutting a sheet of metal in a straight line along the length
(B) Removal of metal to the desired shape from the edge of a plate
(C) Cutting a sheet of metal through part of its length and then bending the cut portion (Answer)
(D) Bending a sheet of metal along a curved axis
8. The chisel used for cutting key ways is
(A) Flat chisel
(B) Cape chisel (Answer)
(C) Round nose chisel
(D) Diamond pointed chisel
9. According to Indian standards, the total numbers of tolerance grades are
(A) 8
(B) 12
(C) 18 (Answer)
(D) 20
10. The metal patterns as compared to wooden patterns require less
(A) Shrinkage allowance
(B) Machining allowance
(C) Draft allowance (Answer)
(D) Distortion allowance
11. In blanking operation, the clearance is provided on
(A) Punch (Answer)
(B) Die
(C) Half on the punch and half on the die
(D) Either on punch or die depending upon designer’s choice
12. For gas welding, the pressure desired at the welding torch for oxygen is
(A) 7 to 103 kN/m²
(B) 70 to 280 kN/m² (Answer)
(C) 280 to 560 kN/m²
(D) 560 to 840 kN/m²
13. For gas welding, the pressure desired at the welding torch for acetylene is
(A) 7 to 103 kN/m² (Answer)
(B) 70 to 280 kN/m²
(C) 280 to 560 kN/m²
(D) 560 to 840 kN/m²
14. In welding magnesium with TIG arc welding, direct current with ________ is used.
(A) Straight polarity
(B) Reversed polarity (Answer)
(C) Both (A) and (B)
(D) None of these
15. In welding copper alloys with TIG arc welding
(A) Direct current with straight polarity is used (Answer)
(B) Direct current with reversed polarity is used
(C) Alternating current is used
(D) Any one of these
16. The diaphragm moulding machine is used to
(A) Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
(B) Ram the sand harder at the back of the mould and softer on the pattern face
(C) Produce uniform packing of sand in the mould
(D) Give uniform sand hardness throughout the mould (Answer)
17. The current in electric resistance welding can be regulated by
(A) Varying the input supply
(B) Changing the primary turns of the transformer (Answer)
(C) Changing the secondary turns of the transformer
(D) Any one of the above
18. According to Indian standard specifications, 100 H6/g5 means that.
(A) Basic size is 100 mm (Answer)
(B) Actual size is 100 mm
(C) Difference between the actual size and basic size is 100 mm
(D) None of the above
19. The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as
(A) Drawing (Answer)
(B) Squeezing
(C) Coining
(D) Planishing
20. In a four high rolling mill, there are four rolls out of which
(A) One is working roll and three are backing up rolls
(B) Two are working rolls and two are backing up rolls (Answer)
(C) Three are working rolls and one is backing up roll
(D) All of the four are working rolls
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