Manufacturing Engineering objective Questions with Answers - Set 05 - ObjectiveBooks

Manufacturing Engineering objective Questions with Answers - Set 05

Practice Test: Question Set - 05

1. 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

2. The cutting force in punching and blanking operations mainly depends on
    (A) The modulus of elasticity of metal
    (B) The shear strength of metal
    (C) The bulk modulus of metal
    (D) The yield strength of metal

3. In ECM, the material removal is due to
    (A) Corrosion
    (B) Erosion
    (C) Fusion
    (D) Ion displacement

4. Allowance in limits and fits refers to
    (A) Maximum clearance between shaft and hole
    (B) Minimum clearance between shaft and hole
    (C) Difference between maximum and minimum sizes of hole
    (D) Difference between maximum and minimum sizes of shaft

5. Green sand mould indicates that
    (A) Polymeric mould has been cured
    (B) Mould has been totally dried
    (C) Mould is green in colour
    (D) Mould contains moisture

6. In a gating system, the ratio 1: 2: 4 represents
    (A) Sprue base area: runner area: ingate area
    (B) Pouring basin area: ingate area: runner area
    (C) Sprue base area: ingate area: casting area
    (D) Runner area: ingate area: casting area

7. Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as
    (A) Cold shut
    (B) Swell
    (C) Sand wash
    (D) Scab

8. Which of the following engineering materials is the most suitable candidate for hot chamber die casting?
    (A) Low carbon steel
    (B) Titanium
    (C) Copper
    (D) Tin

9. 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) (4π/6)³ × (r/l)⁶
    (B) (4π/6) × (r/l)²
    (C) (4π/6)² × (r/l)³
    (D) (4π/6)² × (r/l)⁴

10. An expendable pattern is used in
    (A) Slush casting
    (B) Squeeze casting
    (C) Centrifugal casting
    (D) Investment casting

11. Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer using the given codes.
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

12. 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

13. Hardness of green sand mould increases with
    (A) Increase in moisture content beyond 6 percent
    (B) Increase in permeability
    (C) Decrease in permeability
    (D) Increase in both moisture content and permeability

14. 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

15. 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

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