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. |
Dielectric___________________? |
| A. | Is an electrical insulating material |
| B. | Of low resistivity is preferred |
| C. | Should have high thermal conductivity |
| D. | Need not defy the corrosive action of chemicals |
| Answer» B. Of low resistivity is preferred | |
| 2. |
Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be ______________ mm? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» E. | |
| 3. |
Diamagnetic materials___________________? |
| A. | Are magnetised by eddy currents only |
| B. | Are non-magnetic and cannot be magnetised |
| C. | Are magnetised in direction opposite to the magnetic field |
| D. | Can be magnetised in one direction only |
| Answer» D. Can be magnetised in one direction only | |
| 4. |
Dew point temperature always gives an indication of the __________________ of the moist air ? |
| A. | Dryness |
| B. | Moisture content |
| C. | Coolness |
| D. | Latent heat |
| Answer» C. Coolness | |
| 5. |
Desalination of water__________________? |
| A. | Makes it potable |
| B. | Makes it non-potable |
| C. | Means distillation of water |
| D. | None of these |
| Answer» B. Makes it non-potable | |
| 6. |
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method? |
| A. | Diminishing balance |
| B. | Sinking fund |
| C. | Multiple straight line |
| D. | Sum of the years digit |
| Answer» B. Sinking fund | |
| 7. |
Dephosphorization of molten pig iron is favoured by_______________________? |
| A. | Oxidising and basic slag |
| B. | Reducing and basic slag |
| C. | High activity co-efficient of phosphorous in metal |
| D. | Oxidising and neutral slag |
| Answer» C. High activity co-efficient of phosphorous in metal | |
| 8. |
Density in the solid state is slightly less than that in its liquid state, in case of____________________? |
| A. | Carbon dioxide |
| B. | Water |
| C. | Mercury |
| D. | None of these |
| Answer» C. Mercury | |
| 9. |
Damage to metal surface by mechanical action is called____________________? |
| A. | Pitting |
| B. | Corrosion |
| C. | Erosion |
| D. | None of these |
| Answer» D. None of these | |
| 10. |
Current employed in resistance welding ranges from ____________________ kVA/cm2? |
| A. | 1.2 to 2.5 |
| B. | 4.5 to 6.2 |
| C. | 7.5 to 8.5 |
| D. | 10.5 to 15.5 |
| Answer» C. 7.5 to 8.5 | |
| 11. |
Cupola produces _________________ iron? |
| A. | Pig |
| B. | Cast |
| C. | Wrought |
| D. | Carbon free |
| Answer» C. Wrought | |
| 12. |
‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________? |
| A. | 0°K to 123°K |
| B. | 0°C to – 123°C |
| C. | 0°C to – 273°C |
| D. | 0°K to 273°K |
| Answer» B. 0°C to – 123°C | |
| 13. |
Corrosion of metals cannot be prevented by its__________________? |
| A. | Tempering |
| B. | Chromising |
| C. | Aluminising |
| D. | Alloying |
| Answer» B. Chromising | |
| 14. |
Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium? |
| A. | Concentration |
| B. | Velocity |
| C. | Temperature |
| D. | None of these |
| Answer» B. Velocity | |
| 15. |
Corrosion is____________________? |
| A. | A physical phenomenon |
| B. | A chemical phenomenon |
| C. | Same as erosion |
| D. | An uncontrollable phenomenon |
| Answer» C. Same as erosion | |
| 16. |
Copper deposits are found in India at the following location ? |
| A. | Kudremukh |
| B. | Kolar |
| C. | Khetri |
| D. | Ramagundam |
| Answer» D. Ramagundam | |
| 17. |
Consumable electrodes are used in the ____________________ welding? |
| A. | Gas |
| B. | Arc |
| C. | Thermit |
| D. | Resistance |
| Answer» C. Thermit | |
| 18. |
Constituents of stellite are ____________________? |
| A. | Zinc, copper & nickel |
| B. | Cobalt, chromium & tungsten |
| C. | Zinc, aluminium & nickel |
| D. | Nickel, cobalt & vanadium |
| Answer» C. Zinc, aluminium & nickel | |
| 19. |
Consideration of the creep is the most important in case of the_____________________? |
| A. | Blades of gas turbine |
| B. | Piston of an I. C. engine |
| C. | Flywheel of steam engine |
| D. | Cycle chain |
| Answer» B. Piston of an I. C. engine | |
| 20. |
Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________? |
| A. | R ln 2 |
| B. | -R ln 2 |
| C. | 3 R ln 2 |
| D. | -3R ln 2 |
| Answer» B. -R ln 2 | |
| 21. |
Compressed dry air is used as the cutting fluid, while machining____________________? |
| A. | Steel |
| B. | Cast iron |
| C. | Aluminium |
| D. | None of these |
| Answer» C. Aluminium | |
| 22. |
Common salt is produced from sea water in India generally by the ________________ method? |
| A. | Freeze drying |
| B. | Solar evaporation |
| C. | Electrolytic |
| D. | None of these |
| Answer» C. Electrolytic | |
| 23. |
Colour comparator is used to measure the___________________? |
| A. | pH value |
| B. | Electrode potential |
| C. | Colour intensity |
| D. | None of these |
| Answer» B. Electrode potential | |
| 24. |
Cold working of a material results in increase in hardness, which is termed as the ______________ hardening ? |
| A. | Cold |
| B. | Work |
| C. | Age |
| D. | Induction |
| Answer» C. Age | |
| 25. |
Cold heading or upsetting is categorised as the ________________ process ? |
| A. | Extrusion |
| B. | Bending |
| C. | Rolling |
| D. | Forging |
| Answer» E. | |
| 26. |
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the___________________? |
| A. | Retained austenite |
| B. | Martensite formation |
| C. | Relatively high sulphur content in the base metal |
| D. | Sufficient hydrogen present in the welding arc |
| Answer» C. Relatively high sulphur content in the base metal | |
| 27. |
Cold chisel‟s hammers are made of___________________? |
| A. | High speed steel |
| B. | High carbon steel |
| C. | Forged steel |
| D. | Mild steel |
| Answer» C. Forged steel | |
| 28. |
Cold chisel & hammers are made of_________________? |
| A. | High speed steel |
| B. | High carbon steel |
| C. | Forged steel |
| D. | Mild steel |
| Answer» C. Forged steel | |
| 29. |
Cobalt – 60 is used as a source of _____________ in medical therapy & industrial radiography? |
| A. | X-rays |
| B. | γ-rays |
| C. | α-rays |
| D. | β-rays |
| Answer» C. α-rays | |
| 30. |
Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ? |
| A. | 5-10 |
| B. | 1000-1500 |
| C. | 120-500 |
| D. | 1500-3000 |
| Answer» D. 1500-3000 | |
| 31. |
Coating provided on the electrodes used in the arc welding is not expected to_________________? |
| A. | Add alloying elements |
| B. | Prevent electrode from contamination |
| C. | Stabilise the arc |
| D. | Provide protective atmosphere to weld |
| Answer» C. Stabilise the arc | |
| 32. |
Coarse grained steels have____________________? |
| A. | Low toughness |
| B. | No tendency to distort |
| C. | High density |
| D. | Very high toughness |
| Answer» C. High density | |
| 33. |
Co-efficient of performance of a Carnot cycle refrigerator operating between – 23°C and + 27°C is ________________? |
| A. | 3 |
| B. | 5 |
| C. | 0.5 |
| D. | 1.5 |
| Answer» C. 0.5 | |
| 34. |
Closeness of packing is maximum in case of ____________________ crystal lattice? |
| A. | Face centred |
| B. | Simple cubic |
| C. | Body centred |
| D. | None of these |
| Answer» B. Simple cubic | |
| 35. |
Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_____________________? |
| A. | Piercing |
| B. | Spinning |
| C. | Drawing |
| D. | Extrusion |
| Answer» C. Drawing | |
| 36. |
______________ circuit is most commonly used to measure strain with the help of a strain gauge? |
| A. | Ballast |
| B. | Voltage balancing potentiometric |
| C. | Simple current sensitive |
| D. | None of these |
| Answer» C. Simple current sensitive | |
| 37. |
Chromium molybdenum steel cannot be welded using ______________ welding ? |
| A. | Thermit |
| B. | Electrical resistance |
| C. | Oxy-acetylene |
| D. | Any of these |
| Answer» C. Oxy-acetylene | |
| 38. |
Chlorine acts as a bleaching agent only in the presence of ______________________? |
| A. | Dry air |
| B. | Pure oxygen |
| C. | Moisture |
| D. | Sunlight |
| Answer» D. Sunlight | |
| 39. |
Change in volume of metals from absolute zero temperature to their melting points is___________________? |
| A. | Almost same for all metals |
| B. | Different for different metals |
| C. | Less for low melting point metals |
| D. | Less for high melting point metals |
| Answer» B. Different for different metals | |
| 40. |
Cementite is in the lamellar form in the _____________________ phase of steel ? |
| A. | Martenistic |
| B. | Bainitic |
| C. | Pearlitic |
| D. | Ferritic |
| Answer» D. Ferritic | |
| 41. |
Cemented carbide tools are not suitable for cutting___________________? |
| A. | Aluminium |
| B. | Brass |
| C. | Cast iron |
| D. | Steel |
| Answer» B. Brass | |
| 42. |
Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is___________________? |
| A. | Nickel |
| B. | Cobalt |
| C. | Vanadium |
| D. | Platinum |
| Answer» E. | |
| 43. |
Cast iron contains ____________________ percent carbon? |
| A. | 2.5 |
| B. | 3.75 |
| C. | 4.75 |
| D. | 5.25 |
| Answer» B. 3.75 | |
| 44. |
Cassiterite is an ore of_________________? |
| A. | Tin |
| B. | Lead |
| C. | Molybdenum |
| D. | Chromium |
| Answer» B. Lead | |
| 45. |
Case hardening of a material is__________________? |
| A. | Followed by tempering or carburising |
| B. | Preceded by its tempering |
| C. | Done to get a soft ductile interior with a very hard surface |
| D. | Carried out to get extreme hardness in its core |
| Answer» E. | |
| 46. |
Case hardening is not done by________________? |
| A. | Nitriding |
| B. | Hot dipping |
| C. | Electroplating |
| D. | Both ‘B’ & ‘C’ |
| Answer» E. | |
| 47. |
Cascade control is___________________? |
| A. | The continuous adjustment of the set point index of an automatic control loop by a primary(master) controller |
| B. | Used when changes in process conditions cause serious upsets in the controlled variable |
| C. | Useful to control flow from temperature |
| D. | All A, B & C |
| Answer» E. | |
| 48. |
Carnot cycle is also termed as the constant _________________ cycle in thermodynamics? |
| A. | Entropy |
| B. | Pressure |
| C. | Volume |
| D. | Heat |
| Answer» E. | |
| 49. |
Carbon supply in pack carburising process is in the form of ___________________? |
| A. | Charcoal |
| B. | Calcium carbide |
| C. | Hydrocarbon oil |
| D. | Graphite |
| Answer» B. Calcium carbide | |
| 50. |
Carbon is present in the form of _______________________ in grey cast iron ? |
| A. | Spheroids |
| B. | Nodular aggregates of graphite |
| C. | Flakes |
| D. | Cementite |
| Answer» D. Cementite | |