NCR Departmental Exam : Chemical and Metallurgy, Objective Question Bank With Answer
NCR Departmental Exam : Chemical and Metallurgy,
Objective Question Bank With Answer
Fill in the blanks with correct answer from the following.
1. . …….Metal used in boiler safety plug.
(a) Brass (b) Zink (c) Lead (d) Copper
2. . ...........test is used to detect internal faults of the Axles
(a) Hardness (b) UST (c) DPT (d) None of them
3. Tensile strength of a wire is increased by increasing ………?
(a) Carbon (b) Copper (c) Sulfur (d) All of the above
4. . …………… is the unit of hardness.
(a) BHN (b) Newton (c) Power (d) None of them
5. . ………. has maximum specific heat?
(a) Alcohol (b) Ice (c) Water (d) Veg. oil
6. . ……….. Temperature is equal at 0F & at 0C?
(a) 40 (b) 00 (c) - 40 (d) None
7. . Safety valve of Steam boiler is made of ---------------.
(a) Lead (b) Copper (c) Iron (d) None of these
8. …………gas is used in MIG welding.
(a) CO2 (b) DA (c) Oxygen (d) None of these
9. . ------------ is the Chemical formula of water
(a) H2O (b) H2O2 (c) CO2 (d) None of these
10. ------------ is the unit of Surface finish.
(a) Joule (b) Micron (c) Amp. (d) None of these
11. ------------change Mechanical Energy into Electrical Energy.
(a) Motor (b) Generator (c) Pump (d) None of these
12. ------------ is increased in annealing process
(a) Hardness (b) Softness (c) Toughness (d) None
13. . ------------ is increase by increasing of carbon percentage of steel
(a) Brittleness (b) Ductility (c) softness (d) None of these
14. Water can be purified by ………….
(a) Evaporation (b) RO system (c) Filtering (d) None
15. Chemical formula of copper Sulphate is……………
(a) H2SO4 (b) CuSO4 24 H2O(c) CuSO4 5 H2O (d) None
16. The property to drawing the wire is called …………
(a) Ductality (b) Hardness (c) Stiffness (d) None
17. By increasing the content of sulfur, ……….. increases.
(a) Brittleness (b) Hardness (c) Stiffness (d) None
18. The hardness of Manganese liner is ………… than mild steel.
(a) Less (b) Greater (c) Equal (d) None
19. By tempering …………… increases.
(a) Machinability (b) Hardness (c) Stiffness (d) None
20. …………. % of De-Carbursation is permissible in spring steel bar.
(a) 01 (b) 02 (c) 2.5 (d) None
21. . …………. is removed by peeling of bar.
(a) Fatigue (b) Surface Defect (c) Stiffness (d) None
22. The temperature of Quenching media should not be more than ………. Degree by room temperature.
(a) 50 (b) 10 (c) 100 (d) None
23. Nicrome is a alloy of ……….
(a) Nickel (b) Copper (c) Iron (d) None
24. . ……… are the causes of carbonate and bi-carbonate for the hardness of water.
(a) Calcium-Magnesium (b) Zinc-Magnesium (c)Calcium-Aluminum (d) None
25. . …….. steel is used to make ICF spring.
(a) Silco-Maganese (b) Chrome-Vanadium (c) Stainless Steel (d) None
26. Brittleness increases in steel by increasing ………….
(a) Sulfur (b) Phosphorus (c) Copper (d) None
27. Chisel is made from ………….
(a) Cast Iron (b) Mild Steel (c) High Speed Steel (d) None
28. 0.8 % of carbon and 100% of pearlite in steel is known as ……….
(a) Eutoctoide Steel (b) Hypo Eutoctoide Steel (c) Hyper Eutoctoide Steel (d) None
29. Sheet is made by the property of metal is known as …………
(a) Strength (b) Stiffness (c) Ductility (d) None
30. . ……….. is a non-destructive technique.
(a) Tensile Test (b) Ultrasonic Test (c) Creep Test (d) None
31. . ……….. % silver presents in German Silver.
(a) 01 (b) Nil (c) 08 (d) None
32. . Temperature at which internal changes starts is known as ……….
(a) LCT (b) UCT (c) Normal Temperature (d) None
33. . …………. is done for normalizing in steel.
(a) Fine Grain (b) Remove Stress (c) Ductility (d) None
34. . ………. is a case hardening process.
(a) Carburizing (b) Cyaniding (c) Nitriding (d) All of these
35. The process in which carbon and Nitrogen absorbs is known as …………
(a) Carburizing (b) Cyaniding (c) Induction hardening (d) None
36. . ……. Increases by cold working of metal.
(a) Tensile Strength (b) Hardness (c) Yield Strength (d) None
37. . The process in which cross section of bar reduces and length increases is known as …….
(a) Drawing Down (b) Up setting (c) Peening (d) None
38. The cutting angle of cold chisel is ………. degree.
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