MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is used for imitation jewellery? |
| A. | Aluminium bronze |
| B. | Silicon bronze |
| C. | Gun metal |
| D. | Babbit alloy |
| E. | Duralumin |
| Answer» B. Silicon bronze | |
| 2. |
Blisters in wrought iron cause |
| A. | Brittleness at high temperatures |
| B. | Brittleness at low temperatures |
| C. | Loose textured metal |
| D. | Voids created due to chemical reaction between carbon and iron oxide |
| E. | None of the above |
| Answer» D. Voids created due to chemical reaction between carbon and iron oxide | |
| 3. |
The modulus of elasticity E, the modulus of rigidity C, and Poisson's ratio are related by the equation |
| A. | E = G (1+ 2 |
| B. | E = 2G (1 - 2 |
| C. | E = 2G (1 - |
| D. | E = G (2 + |
| E. | E = 2G (1 + |
| Answer» F. | |
| 4. |
The process of production of articles having a soft ductile interior and a very hard surface, is known as |
| A. | Hardening |
| B. | Hardening and tempering |
| C. | Case hardening |
| D. | Hardening and annealing |
| E. | None of the above |
| Answer» D. Hardening and annealing | |
| 5. |
Ligancy is |
| A. | the number of atoms (or ions) surrounding and touching a central atom |
| B. | a covalent bond between two atoms |
| C. | the angle betweent he two closest directional bond of an atom |
| D. | None of the above |
| E. | None of the above |
| Answer» B. a covalent bond between two atoms | |
| 6. |
The product of a cupola known as |
| A. | Malleable iron |
| B. | Steel |
| C. | Pig iron |
| D. | Cast iron |
| E. | Cast steel |
| Answer» E. Cast steel | |
| 7. |
Which of the following can have positive or negative charge? |
| A. | Neutron |
| B. | Isotope |
| C. | Hole |
| D. | Electron |
| E. | Iron |
| Answer» F. | |
| 8. |
Figure of merit is used to |
| A. | compare the efficiency of chermoelectric materials |
| B. | measure the extent of doping of intrinsic semi-conductors |
| C. | compare the extent of purity of semi-seonuctor materials |
| D. | None of the above |
| E. | None of the above |
| Answer» B. measure the extent of doping of intrinsic semi-conductors | |
| 9. |
Heavy water is obtained by |
| A. | Slow evaporation of water |
| B. | Low temperature, low pressure distillation |
| C. | Rapid evaporation of water |
| D. | Repeared purification |
| E. | Prolonged electrolysis of water |
| Answer» F. | |
| 10. |
Which of the following material can withstand maximum shocks without failure? |
| A. | Malleable cast iron |
| B. | Pig iron |
| C. | Gray cast iron |
| D. | Chilled cast iron |
| E. | White cast iron |
| Answer» B. Pig iron | |
| 11. |
Lime stone acts as a flux in a cupola. It is generally added in the proportion |
| A. | 30 kg of limestone per tonner of iron |
| B. | One tonne of limestone per tonne of charge |
| C. | 10 kg of limestone per tonne of iron |
| D. | 500 kg of limestone per tonne of coke |
| E. | 100 kg of limestone per tonne of iron |
| Answer» F. | |
| 12. |
Steel may be manufactured by |
| A. | Bessemer process |
| B. | Open hearth process |
| C. | Cementation process |
| D. | Duplex process |
| E. | Any of the above |
| Answer» C. Cementation process | |
| 13. |
If a material has similar properties throughout its volume, it is said to be |
| A. | Homogeneous |
| B. | Uniform |
| C. | Isentropic |
| D. | Continuous |
| E. | Isotropic |
| Answer» B. Uniform | |
| 14. |
The operation of cutting out flat areas to some desired shape and which is generally the first step in a series of operations is known as |
| A. | Lancing |
| B. | Coining |
| C. | Slitting |
| D. | Curling |
| E. | Blanking |
| Answer» F. | |
| 15. |
Metal spinning |
| A. | Is done on symmetrical articles |
| B. | Utilises point hard tools |
| C. | Is done on unsymmetrical articles |
| D. | Does not require dies |
| E. | Is done at low speeds |
| Answer» B. Utilises point hard tools | |
| 16. |
Which one of the following is usually most ductile? |
| A. | Hexagonal close packed lattice |
| B. | Body centred cubic lattice |
| C. | Face centred cubic lattic |
| D. | Combination of (A) and (C) above |
| E. | None of the above |
| Answer» D. Combination of (A) and (C) above | |
| 17. |
The graphite rods in a nuclear pile |
| A. | Furnish alpha beta particles |
| B. | Furnish alpha particles |
| C. | Furnish neutron to fission U235 |
| D. | Undergo combustion which triggers the fission reaction |
| E. | Convert fast moving neutrons into thermal neutrons |
| Answer» F. | |
| 18. |
Cold worked components are generally subjected to |
| A. | Annealing |
| B. | Hardening |
| C. | Shot peening |
| D. | Tempering |
| E. | Sherodising |
| Answer» B. Hardening | |
| 19. |
The solid solution carbon in alpha iron obtained on cooling of 0.2% carbon steel which have been heated above the third critical point is called |
| A. | Austenite |
| B. | Pearlite |
| C. | Ferrite |
| D. | Ferrite |
| E. | Cementite |
| Answer» E. Cementite | |
| 20. |
A thermocouple works on which of the following effect? |
| A. | Thomson effect |
| B. | Seeback effect |
| C. | Peltier effect |
| D. | Joule effect |
| E. | None of the above |
| Answer» C. Peltier effect | |
| 21. |
Iron alloyed with carbon more than 2% is called |
| A. | Mild steel |
| B. | Carbon steel |
| C. | Cast iron |
| D. | Alloy steel |
| E. | High carbon steel |
| Answer» D. Alloy steel | |
| 22. |
Within elastic limits |
| A. | Load is gradually applied |
| B. | Deformation is permanent |
| C. | Deformation is proportional to the load |
| D. | Load is less |
| E. | Load is static |
| Answer» D. Load is less | |
| 23. |
The material for wire drawing should have |
| A. | High hardness |
| B. | High melting point |
| C. | Low boiling point |
| D. | Stiffness |
| E. | High ductility |
| Answer» F. | |
| 24. |
The maximum hardenability of any steel depends on |
| A. | The carbon content |
| B. | The chemical composition |
| C. | The grain size |
| D. | The alloying elements present |
| E. | None of the above |
| Answer» B. The chemical composition | |
| 25. |
Corrosion resistance of steels is increased by the addition of alloying elements like |
| A. | Tungsten |
| B. | Chromium and nickel |
| C. | Cobalt and vanadium |
| D. | Silicon and sulphur |
| E. | Sulphur |
| Answer» D. Silicon and sulphur | |
| 26. |
The variable stress below which the probability of failure of a material is negligible, is called |
| A. | Endurance limit |
| B. | Tolerance limit |
| C. | Yield point |
| D. | Elastic limit |
| E. | Plastic limit |
| Answer» C. Yield point | |
| 27. |
Galena is the ore for |
| A. | Zinc |
| B. | Lead |
| C. | Germanium |
| D. | Aluminium |
| E. | Copper |
| Answer» C. Germanium | |
| 28. |
Process of making a thin phosphate coating on steel to act as a base or primer for enamels and paints in known as |
| A. | Prepainting |
| B. | Colourizing |
| C. | Anodising |
| D. | Surface preparing |
| E. | Parkerizing |
| Answer» F. | |
| 29. |
Which is expected to be strongest in tension? |
| A. | Aluminium wire |
| B. | Mild steel wire |
| C. | Piano wire |
| D. | Stainless steel wire |
| E. | Brass wire |
| Answer» D. Stainless steel wire | |
| 30. |
Stress concentration may be caused by |
| A. | Change in shape |
| B. | A home or a notch in the body |
| C. | Polishing or painting a surface |
| D. | Change in dimensions |
| E. | Change in cross-sectional area |
| Answer» C. Polishing or painting a surface | |
| 31. |
Polystrene at room temperature is |
| A. | Brittle |
| B. | Malleable |
| C. | Ductile |
| D. | Soft |
| E. | None of the above |
| Answer» B. Malleable | |
| 32. |
Electro-forming is particularly vauable for |
| A. | Non-ferrous components |
| B. | Good conductors of electricity |
| C. | Parts which cannot be machined |
| D. | Decorative items |
| E. | Thin walled parts requiring a high order of accuracy and internal surface finish |
| Answer» F. | |
| 33. |
A surface damage which results when two surfaces in contact experience light periodic relative motion is |
| A. | Fretting |
| B. | Pitting |
| C. | Corrosion |
| D. | Surface wear |
| E. | None of the above |
| Answer» B. Pitting | |
| 34. |
All of the following are examples of ceramic materials EXCEPT |
| A. | Bakelite |
| B. | Aluminium oxide |
| C. | Magnesium oxide |
| D. | Glass |
| E. | None of the above is true |
| Answer» B. Aluminium oxide | |
| 35. |
Shot peening |
| A. | Changes the crystalline structure of material |
| B. | Refines the grain structure |
| C. | Is done at recrystallization temperature |
| D. | Improves fatigue life of small parts |
| E. | Causes metal surface to be in tension and the layer beneath in compression |
| Answer» E. Causes metal surface to be in tension and the layer beneath in compression | |
| 36. |
Small end of a connecting rod forging is |
| A. | Super finished |
| B. | Ground |
| C. | Broached |
| D. | Honned |
| E. | Lapped |
| Answer» D. Honned | |
| 37. |
Which of the following class of materials are good conductors of heat and electricity? |
| A. | Polymers |
| B. | Dielectries |
| C. | Ceramics |
| D. | Semi-conductors |
| E. | Metals |
| Answer» F. | |
| 38. |
By alloying copper with manganese which of the following increases? |
| A. | Specific gravity |
| B. | Tensile strength |
| C. | Melting point |
| D. | Electrical conductivity |
| E. | None of the above |
| Answer» C. Melting point | |
| 39. |
When metal is deformed by cold work, severe stresses known as residual stresses are undesirable and to remove them |
| A. | The metal should be stressed in reverse direction |
| B. | The metal should be painted |
| C. | The metal should be reheated below recrystallization temperature |
| D. | The metal should be reheated above recrystallization temperature |
| E. | None of the above |
| Answer» D. The metal should be reheated above recrystallization temperature | |
| 40. |
Sorbite' is obtained when |
| A. | Quenching steel during transformation |
| B. | Steel is annealed |
| C. | A fully hardened steel is finally 'drawn' at about 677?C |
| D. | None of the above |
| E. | Copper nickel and chromium |
| Answer» C. A fully hardened steel is finally 'drawn' at about 677?C | |
| 41. |
When piece of 0.2% carbon steel is heated above third critical point the steel is a solid solution of carbon in gamma iron and called |
| A. | Ferrite |
| B. | Austenite |
| C. | Pearlite |
| D. | Eutectoid |
| E. | Cementite |
| Answer» C. Pearlite | |
| 42. |
Monel metal consists of |
| A. | At which change of allotropic form takes place. |
| B. | Aluminium copper and nickel |
| C. | Zinc, copper and lead |
| D. | Zinc nickel and copper |
| E. | Nickel, lead and tin |
| Answer» C. Zinc, copper and lead | |
| 43. |
Selenium is an |
| A. | intrinsic semi-conductor |
| B. | extrinsic semi-conductor |
| C. | p-type semi-conductor |
| D. | n-type semi-conductor |
| E. | None of the above |
| Answer» B. extrinsic semi-conductor | |
| 44. |
During induction hardening the depth of hardening is controlled by |
| A. | Current |
| B. | Voltage |
| C. | Frequency |
| D. | Phase angle |
| E. | None of the above |
| Answer» C. Frequency | |
| 45. |
Silicon doped with phosphorous is an |
| A. | intrinsic semi-conductor |
| B. | extrinsic semi-conductor |
| C. | p-type semi-conductor |
| D. | n-type semi-conductor |
| E. | None of the above |
| Answer» E. None of the above | |
| 46. |
The material which undergo recoverable deformation and exhibit rubber like elsticity are called |
| A. | Pure elastic materials |
| B. | Elastomers |
| C. | Rubbers |
| D. | Creep-elastic |
| E. | None of the above |
| Answer» C. Rubbers | |
| 47. |
Cadmium sulphide cell is a |
| A. | Photo conductive cell |
| B. | Solar cell |
| C. | Thermocouple |
| D. | Photovoltaic cell |
| E. | Photo emissive cell |
| Answer» B. Solar cell | |
| 48. |
when atoms are hold together by the sharing of valence electrons |
| A. | They form a covalent bond |
| B. | The valence electrons are free to move away from the atom |
| C. | Each shared electron leaves a hole |
| D. | Each atom becomes free to move |
| E. | None of the above |
| Answer» B. The valence electrons are free to move away from the atom | |
| 49. |
Machinability of a metal depends on |
| A. | Tensile strength |
| B. | Hardness |
| C. | Toughness |
| D. | (A) and (B) above |
| E. | (B) and (C) above |
| Answer» E. (B) and (C) above | |
| 50. |
Cold shortness is |
| A. | Too much shrinkage of materials at low temperatures |
| B. | Uneven shrinkage of materials at low temperatures |
| C. | Brittleness of material at low temperature |
| D. | The region where Hooke's law does not hold good |
| E. | None of the above |
| Answer» E. None of the above | |