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. |
The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is |
| A. | Iso-strain |
| B. | Hysteresis |
| C. | Bounhinger effect |
| D. | Relaxation |
| E. | Hooke's effect |
| Answer» C. Bounhinger effect | |
| 2. |
Which material has the best damping capacity |
| A. | Cast iron |
| B. | Mild steel |
| C. | High speed steel |
| D. | Diamond |
| E. | Stainless steel |
| Answer» B. Mild steel | |
| 3. |
Plastic are |
| A. | Good conductors of heat and bad conductors of electricity |
| B. | Good conductors of heat as well as electricity |
| C. | Bad conductors of heat and good conductors of electricity |
| D. | Bad conductors of heat as well as electricity |
| E. | Semi-conductors |
| Answer» E. Semi-conductors | |
| 4. |
Spring steel sections are originally applied in |
| A. | Hardened condition |
| B. | Hardened and tempered condition |
| C. | Annealed condition |
| D. | Carburized condition |
| E. | None of the above |
| Answer» D. Carburized condition | |
| 5. |
When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be |
| A. | Anisotropic |
| B. | Identical |
| C. | Isotropic |
| D. | Uniform |
| E. | Non-uniform |
| Answer» B. Identical | |
| 6. |
The defect responsible for the phenomenon of slip, by which most metals deform plastically, is known as |
| A. | Fracture |
| B. | Twinning |
| C. | Dislocation |
| D. | Strain hardening |
| E. | None of the above |
| Answer» D. Strain hardening | |
| 7. |
In a 0.2% carbon steel which has been heated above the third critical temperature on cooling at the first critical point the austenite remaining in solution is transformed to new structure called |
| A. | Ferrite |
| B. | Cementite |
| C. | Austenite |
| D. | Ferrite |
| E. | Pearlite |
| Answer» F. | |
| 8. |
Galvanizing is generally done on |
| A. | Low carbon steels |
| B. | Cast iron |
| C. | Non-ferrous metals |
| D. | Non-metallic substances |
| E. | None of the above |
| Answer» B. Cast iron | |
| 9. |
Cheek is |
| A. | Top surface of metal |
| B. | Physical property of metal |
| C. | Non-ferrous coating on materials |
| D. | Core of the welded joints in case of very thick material |
| E. | Intermediate flask between copes and drag |
| Answer» F. | |
| 10. |
Cast irons are generally specified by |
| A. | Hardness |
| B. | Carbon percentage |
| C. | Tensile strength |
| D. | Iron percentage |
| E. | Process of manufacture |
| Answer» D. Iron percentage | |
| 11. |
If a material recovers its original dimensions, when the load is removed, it is known as |
| A. | Elastic |
| B. | Soft |
| C. | Annealed |
| D. | Plastic |
| E. | Brittle |
| Answer» B. Soft | |
| 12. |
Cold shuts are |
| A. | Saturation of pores in bricks |
| B. | Saturation of pores in metals by subsituting materials different from parent materials |
| C. | Defects in castings due to two streams of metal which are too cold to fuse properly |
| D. | Forging defects due to improper heating of materials |
| E. | None of the above |
| Answer» D. Forging defects due to improper heating of materials | |
| 13. |
Which of the following is a composite material? |
| A. | Y-alloy |
| B. | High speed steel |
| C. | Tungsten carbide |
| D. | Fibre reinforced plastic |
| E. | None of the above |
| Answer» E. None of the above | |
| 14. |
Which of the following does not contain copper as one of the alloying elements? |
| A. | Monel metal |
| B. | Perminivar |
| C. | Nichrome |
| D. | Manganin |
| E. | All of the above |
| Answer» D. Manganin | |
| 15. |
"Troosite" is obtained when |
| A. | Quenching steel during transformation |
| B. | A fully hardened steel is finally drawn at about 677?C |
| C. | Steel is rapidly quenched in oil |
| D. | When alloy steels are rapidly quenched in water |
| E. | None of the above |
| Answer» B. A fully hardened steel is finally drawn at about 677?C | |
| 16. |
A steel having ferrite and pearite is |
| A. | Soft |
| B. | Hard |
| C. | Ductile |
| D. | (A) and (B) above |
| E. | (A) and (C) above |
| Answer» B. Hard | |
| 17. |
The tendency for brittle fracture increases with |
| A. | Increasing temperature |
| B. | Decreasing strain rate |
| C. | Appreciable plastic deformation before fracture |
| D. | Appreciable plastic deformation during propagation of the crack |
| E. | None of the above |
| Answer» F. | |
| 18. |
Delta iron occurs at temperature in the range of |
| A. | Room temperature to 600?C |
| B. | 600?C to critical temperature |
| C. | Between 800?C and 1200?C |
| D. | Between 1400?C and 1530?C |
| E. | None of the above |
| Answer» E. None of the above | |
| 19. |
Which variety of copper has the best mechanical strength? |
| A. | Annealed copper |
| B. | Hard drawn copper |
| C. | Cast copper |
| D. | Soft copper |
| E. | None of the above |
| Answer» C. Cast copper | |
| 20. |
Preheating of material to be welded is necessary in case of |
| A. | Non-ferrous materials |
| B. | Cast iron |
| C. | Stainless steel |
| D. | Carbon steel |
| E. | High speed steel |
| Answer» C. Stainless steel | |
| 21. |
In carbon steel castings |
| A. | The percentage of carbon is less than 1.7% |
| B. | The percentage of carbon is between 1.7% to 2% |
| C. | The percentage for alloying elements is controlled |
| D. | (A) and (C) above |
| E. | (B) and (C) above |
| Answer» B. The percentage of carbon is between 1.7% to 2% | |
| 22. |
Gamma iron has |
| A. | Body centred space lattice structure containing 6 atoms |
| B. | Body centred space lattice structure containing 10 atoms |
| C. | Face centred space lattice structure with 8 atoms |
| D. | Face centred space lattice structure with 14 atoms |
| E. | None of the above |
| Answer» E. None of the above | |
| 23. |
Moh's scale of hardness has the range |
| A. | 10--15 |
| B. | 1--5 |
| C. | 1--3 |
| D. | 1--10 |
| E. | 5--10 |
| Answer» E. 5--10 | |
| 24. |
In normalising steel is heated 40-50 C |
| A. | Above the upper transformation range |
| B. | Above the lower transformation range |
| C. | Below the lower transformation range |
| D. | Above room temperature |
| E. | Below the upper transformation range |
| Answer» B. Above the lower transformation range | |
| 25. |
In order to improve machinability of steels, the treatment generally done is |
| A. | Cyniding |
| B. | Tempering |
| C. | Spheroidising |
| D. | Annealing |
| E. | Normalising |
| Answer» E. Normalising | |
| 26. |
The process by which steel is coated by a thin layer of phosphate is known as |
| A. | Anodising |
| B. | Phosphorizing |
| C. | Spheroidizing |
| D. | Parkerising |
| E. | Sheradising |
| Answer» E. Sheradising | |
| 27. |
Steel balls for ball bearings are generally made of |
| A. | Carbon chrome steel |
| B. | Stainless steel |
| C. | Cast steel |
| D. | Nodular cast iron |
| E. | Free carbon steel |
| Answer» B. Stainless steel | |
| 28. |
The effect f rolling on steel is |
| A. | To elongate the inclusions in the direction of rolling giving the steel excellent properties |
| B. | Reduction in tensile strength |
| C. | Reduction in fatigue strength |
| D. | Reduction in hardness |
| E. | None of the above |
| Answer» B. Reduction in tensile strength | |
| 29. |
A concrete wall generally |
| A. | Isentropic material |
| B. | Creates sound |
| C. | Transmits sound |
| D. | Reflects sound |
| E. | Absorbs sound |
| Answer» E. Absorbs sound | |
| 30. |
The size of coarse grams in metals is |
| A. | > 0.0005 mm |
| B. | >1 mm |
| C. | > 0.05 mm |
| D. | > 0.005 mm |
| E. | > 0.5 mm |
| Answer» D. > 0.005 mm | |
| 31. |
The surface hardness that can be obtained by nitriding is generally in the range |
| A. | 600 to 800 VPN |
| B. | Strength and hardness of steel is increased |
| C. | 400 to 600 VPN |
| D. | 1000 to 1100 VPN |
| E. | Below 400 VPN |
| Answer» E. Below 400 VPN | |
| 32. |
Machining properties of brass can be improved by the addition of |
| A. | Carbon |
| B. | Lead |
| C. | Zinc |
| D. | Chromium |
| E. | Aluminium Copper alloy |
| Answer» C. Zinc | |
| 33. |
In cast irons |
| A. | Impact strength is high |
| B. | With static loading the strength in tension is higher than that in compression |
| C. | With static loading the strength in tension is lower than that in compression |
| D. | (A) and (B) above |
| E. | (A) and (C) above |
| Answer» D. (A) and (B) above | |
| 34. |
Creep is expressed in terms of |
| A. | cm/cm2/hr |
| B. | cm/cm |
| C. | kg/cm2 |
| D. | cm/cm/hr |
| E. | kg/cm |
| Answer» E. kg/cm | |
| 35. |
Heavy water is used in atomic power plants as |
| A. | Source of energy |
| B. | Moderator |
| C. | Lubricant |
| D. | Fuel |
| E. | Viscous damping fluid |
| Answer» C. Lubricant | |
| 36. |
As per ISS : designation T 70 W 18 4V 1 is |
| A. | Stainless steel |
| B. | Low carbon steels |
| C. | High speed steel |
| D. | Soft |
| E. | Silicon steel |
| Answer» D. Soft | |
| 37. |
In 18-4-1 high speed steel the maximum percentage of any constituent is |
| A. | Iron |
| B. | Chromium |
| C. | Tungsten |
| D. | Carbon |
| E. | Vanadium |
| Answer» B. Chromium | |
| 38. |
The advantage of electroforming is |
| A. | Extreme dimensional accuracy can be held on surfaces with surface finish of 8 r.m.s. or even less |
| B. | Laminated metals can be produced |
| C. | Rate of production is very high |
| D. | (A) and (B) above |
| E. | (A) and (C) above |
| Answer» E. (A) and (C) above | |
| 39. |
According to Hooke's law |
| A. | Stress is proportional to strain |
| B. | Stress/strain is constant |
| C. | Average stress is proportional to average strain |
| D. | Within elastic limits average stress is proportional to average strain |
| E. | None of the above |
| Answer» E. None of the above | |
| 40. |
Which of the following is not the characteristic property of aluminium? |
| A. | Good electrical conductivity |
| B. | Lightness |
| C. | Lest affinity for oxygen |
| D. | Resistance to corrosion |
| E. | High thermal conductivity |
| Answer» D. Resistance to corrosion | |
| 41. |
Fatigue failure occurs when a part is subjected to |
| A. | Tensile stress |
| B. | Compressive stress |
| C. | Torsion |
| D. | Fluctuating stress |
| E. | None of the above |
| Answer» E. None of the above | |
| 42. |
Which one is different from the others in press work operations? |
| A. | Riveting |
| B. | Sizing |
| C. | Coining |
| D. | Flattening |
| E. | Punching |
| Answer» F. | |
| 43. |
Every material obeys the Hooke's law within |
| A. | Breaking limit |
| B. | Elastic limit |
| C. | Plastic limit |
| D. | Limit of proportionality |
| E. | Yield limit |
| Answer» C. Plastic limit | |
| 44. |
Residual magnetism is |
| A. | Magnetism left in a sample after a decade |
| B. | Magnetism left in a sample after one year |
| C. | Flux density present in a material after magnetising force is removed |
| D. | The magnetic force required to fully demagnetise a sample |
| E. | None of the above |
| Answer» D. The magnetic force required to fully demagnetise a sample | |
| 45. |
A ductile fracture is characterized by |
| A. | Rapid rate for crack propagation |
| B. | Negligible deformation |
| C. | Fragmentation into more than two pieces |
| D. | Appreciable plastic deformation prior to propagation of crack |
| E. | None of the above |
| Answer» E. None of the above | |
| 46. |
In powder metallurgy the process of heating the cold pressed metal powder is known as |
| A. | Sintering |
| B. | Granulation |
| C. | Deposition |
| D. | Precipitation |
| E. | None of the above |
| Answer» B. Granulation | |
| 47. |
In press work the dies that perform two or more operations simultaneously, but at different stations are known as |
| A. | Multi-dies |
| B. | Simple dies |
| C. | Compound dies |
| D. | Die and punch set |
| E. | Progressive dies |
| Answer» F. | |
| 48. |
Which process is used for machining parts to planned dimensions? |
| A. | Shearadising |
| B. | Swaging |
| C. | Electroforming |
| D. | Anodizing |
| E. | Routing |
| Answer» F. | |
| 49. |
In electro-forming the metal is supplied to the mould from |
| A. | Solution |
| B. | By liquids |
| C. | Electrolytic solution in which bar of pure metal acts as an anode for the plating current |
| D. | Separately by coating with a point |
| E. | None of the above |
| Answer» D. Separately by coating with a point | |
| 50. |
The materials which has the same elastic properties in all directions is called |
| A. | Brittle material |
| B. | Homogeneous material |
| C. | Hard material |
| D. | Isotropic material |
| E. | Isentropic material |
| Answer» E. Isentropic material | |