Bihar SBTE Diploma Mechanical 3rd SEM Dec 2019 Paper on MEM
| Sr. No. | Questions with options |
| 1 | The ductility is the properties of a material due to which it
(a) Can be drawn into wires (b) Breaks with little permanent distorsion (c) Can be rolled (d) Can be hammered into thin sheets |
| 2 | Which of the following property is desirable for materials used in tools
(a) Elasticity (b) Plasticity (c) Ductility (d) Toughness |
| 3 | Which of the following materials has maximum ductility?
(a) Mild steel (b) Copper (c) Nickel (d) Aluminium |
| 4 | The hardness is the property of a material due to which it
(a) Can be brawn into wires (b) Breaks with little permanent distorsion (c) Can cut another metal (d) Can be rolled |
| 5 | Which of the following is ferrous metals
(a) Steel (b) Aluminium (c) Copper (d) All of these |
| 6 | Cast iron has
(a) High compressive strength (b) Excellent machinability (c) Good casting characteristic (d) All of these |
| 7 | Percentage of carbon in gray cast Iron is
(a) 0.3% to 1% (b) 1% to 2% (c) 2.1% to 3.75% (d) 4% to 6.67% |
| 8 | A steel alloys containing 36% Nickel is called
(a) Stainless steel (b) High speed steel (c) Invar (d) Heat resisting steel |
| 9 | Eutectoid reaction occurs at
(a) 600 degree Celsius (b) 723 degree Celsius (c) 1147 degree Celsius (d) 1498 degree Celsius |
| 10 | Which constituent has BCC structure
(a) Alpha Ferrite (b) Austenite (c) Cementite (d) Bauxite |
| 11 | Which of the following is a copper based alloys?
(a) Gun metal (b) Bronze (c) Muntz metal (d) All of these |
| 12 | Bronze is an alloy of
(a) Copper and zinc (b) Copper and tin (c) Copper tin and zinc (d) None of these |
| 13 | Heat treatment is done to
(a) Relieve internal stress (b) Improved mechanical properties (c) To remove trapped gases (d) All of these |
| 14 | Nitriding is a process used to
(a) Reduce the wear resistance (b) Increase the wear resistance (c) Increase the surface hardness (d) None of these |
| 15 | Primary objective of full annealing is to
(a) Increase toughness and yield point (b) Reduce ductility and resilience (c) Improve surface finish (d) Increase ductility and machinability |
| 16 | Which of the following is case hardening process?
(a) Carburizing (b) Cyaniding (c) Nitriding (d) All of these |
| 17 | Poly vinylchloride (PVC) is a
(a) Thermoplastic (b) Thermosetting (c) Ceramics (d) None of these |
| 18 | Which of the following material is NOT a composite?
(a) Wood (b) Concrete (c) Plywood (d) Sialon |
| 19 | Which of the following is related to powder metallurgy?
(a) Compacting (b) Blending (c) Sintering (d) All of these |
| 20 | Dye penetrant test is a
(a) Destructive test (b) Non destructive test (c) Ultrasonic test (d) None of these |
| Published On – 1st June 2022 | |
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