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. |
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be%! |
| A. | ΔQ = 0, ΔS=0 |
| B. | ΔQ = 0 , ΔS = +ve |
| C. | ΔQ = 0, ΔS = -ve |
| D. | ΔQ = +ve , ΔS= +ve |
| Answer» C. ≈í√ÆQ = 0, ≈í√ÆS = -ve | |
| 2. |
α-rays are%! |
| A. | Negatively charged |
| B. | Positively charged |
| C. | Neutral |
| D. | Same as X-rays |
| Answer» C. Neutral | |
| 3. |
Lap joints are preferred over butt joints in soldering/brazing, because these joints are%! |
| A. | Weaker in tension but stronger in shear |
| B. | Weaker in shear but stronger in tension |
| C. | Stronger in both shear and tension |
| D. | The lap joints are easily made |
| Answer» E. | |
| 4. |
Which of the following is not an ore of copper?%! |
| A. | Evaporation and condensation |
| B. | Solid state diffusion processes |
| C. | Liquid formation in grain boundaries |
| D. | Creation of more dislocations |
| Answer» C. Liquid formation in grain boundaries | |
| 5. |
'Cryogenics' is concerned with the generation & use of low temperature in the range of%! |
| A. | Cryolite |
| B. | Azurite |
| C. | Chalcopyrite |
| D. | Malachite |
| Answer» B. Azurite | |
| 6. |
Which of the following is not the function of a volute casing provided in a centrifugal pump?%! |
| A. | To reduce the head loss in discharge |
| B. | To increase the pump efficiency |
| C. | To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity |
| D. | To increase the pump discharge rate |
| Answer» B. To increase the pump efficiency | |
| 7. |
Tungsten in high speed steel is responsible for its%! |
| A. | Toughness & wear resistance |
| B. | Cold hardness |
| C. | Hot hardness |
| D. | Sharp cutting edge |
| Answer» D. Sharp cutting edge | |
| 8. |
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.%! |
| A. | Hard |
| B. | Soft |
| C. | Silicon carbide |
| D. | Aluminium oxide |
| Answer» E. | |
| 9. |
__________ the exhaust gas is an indication of the incomplete combustion of fuel.%! |
| A. | Low temperature of |
| B. | High temperature of |
| C. | High % of CO in |
| D. | High % of CO‚ÇÇ in |
| Answer» E. | |
| 10. |
Silicon percentage in acid resistant cast iron is about%! |
| A. | 4 |
| B. | 8 |
| C. | 14 |
| D. | 20 |
| Answer» B. 8 | |
| 11. |
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be%! |
| A. | Parabolic |
| B. | Hyperbolic |
| C. | Straight line |
| D. | None of these |
| Answer» D. None of these | |
| 12. |
Working of linear variable differential transducer (LVDT) is based on the principle of variable%! |
| A. | Capacitance |
| B. | Resistance |
| C. | Mutual inductance |
| D. | None of these |
| Answer» D. None of these | |
| 13. |
Dislocation cross-slip is difficult in those materials, which have%! |
| A. | Large number of slip systems |
| B. | High work hardening rate |
| C. | Coarse grain size |
| D. | Low stacking fault energy |
| Answer» B. High work hardening rate | |
| 14. |
Classification of metal forming processes into hot and cold working is based on the following parameters.%! |
| A. | Stacking fault energy |
| B. | Recrystallisation temperature |
| C. | Solidus temperature |
| D. | Transformation temperature |
| Answer» C. Solidus temperature | |
| 15. |
Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of%! |
| A. | Lumps |
| B. | Pellets |
| C. | Briquettes |
| D. | Sinter |
| Answer» C. Briquettes | |
| 16. |
Alloys having more than 80% copper are generally more%! |
| A. | Abrasion resistant |
| B. | Corrosion resistant |
| C. | Prone to season cracking |
| D. | Machinable |
| Answer» C. Prone to season cracking | |
| 17. |
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then%! |
| A. | It will deliver low discharge of liquid |
| B. | Its efficiency will not be affected |
| C. | It will not develop sufficient head to raise water |
| D. | It will be cavitated |
| Answer» C. It will not develop sufficient head to raise water | |
| 18. |
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an%! |
| A. | Pitot tube |
| B. | Hot wire anemometer |
| C. | Rotameter |
| D. | Stroboscope |
| Answer» B. Hot wire anemometer | |
| 19. |
Specific heat of an ideal gas depends upon its |
| A. | Molecular weight |
| B. | Pressure |
| C. | Temperature |
| D. | Volume |
| Answer» D. Volume | |
| 20. |
Materials having __________ lattice structure are usually the most ductile.%! |
| A. | Body centred cubic (bcc) |
| B. | Hexagonal close packed (hcp) |
| C. | Face centred cubic (fcc) |
| D. | None of these |
| Answer» D. None of these | |
| 21. |
A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/seC‚ÇÇ is%! |
| A. | 8.82 |
| B. | 9.81 |
| C. | 10.88 |
| D. | 0.95 |
| Answer» B. 9.81 | |
| 22. |
Free oxygen is removed from boiler feed water, because it%! |
| A. | Reduces heat transfer co-efficient |
| B. | Is corrosive |
| C. | Causes explosion |
| D. | None of these |
| Answer» C. Causes explosion | |
| 23. |
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.%! |
| A. | Proportional |
| B. | Integral |
| C. | Derivative |
| D. | None of these |
| Answer» C. Derivative | |
| 24. |
The reductant used in the extraction of magnesium from calcined dolomite via Pidgeon's process is%! |
| A. | Pure carbon |
| B. | Pure silicon |
| C. | Ferro silicon |
| D. | Ferro manganese |
| Answer» D. Ferro manganese | |
| 25. |
Which of the following alloying elements reduces the formation of iron sulphide in steel?%! |
| A. | Cobalt |
| B. | Nickel |
| C. | Manganese |
| D. | Vanadium |
| Answer» C. Manganese | |
| 26. |
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.%! |
| A. | 0.5 |
| B. | 3 |
| C. | 10 |
| D. | 25 |
| Answer» C. 10 | |
| 27. |
The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the%! |
| A. | Ability to absorb shock |
| B. | Capacity to store energy |
| C. | Ratio of the wire & coil diameters |
| D. | Load to produce unit deflection |
| Answer» E. | |
| 28. |
Coating of zinc over steel is known as%! |
| A. | Cladding |
| B. | Galvanising |
| C. | Anodising |
| D. | Passivation |
| Answer» C. Anodising | |
| 29. |
The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.%! |
| A. | 768 |
| B. | 908 |
| C. | 1400 |
| D. | 1539 |
| Answer» B. 908 | |
| 30. |
An ingot is hot forged to a 60% reduction in cross-section area. The percentage reduction in the volume for the above process is%! |
| A. | 0 |
| B. | 60 |
| C. | 30 |
| D. | 20 |
| Answer» B. 60 | |
| 31. |
Particle nature of cathode rays is proved due to the fact that they%! |
| A. | Travel in a straight line |
| B. | Get deflected by magnetic electric field |
| C. | Produce fluorescence |
| D. | Heat the exposed material |
| Answer» C. Produce fluorescence | |
| 32. |
Increase in the entropy of a system represents the%! |
| A. | Degradation of energy |
| B. | Decrease in system pressure |
| C. | Increase in the availability of energy |
| D. | Increase in the temperature |
| Answer» B. Decrease in system pressure | |
| 33. |
Basic open hearth furnace (BOF) is not used for producing __________ steel.%! |
| A. | Killed |
| B. | Rimming |
| C. | High alloy |
| D. | None of these |
| Answer» D. None of these | |
| 34. |
Sudden immersion/dipping of red hot steel bar in water makes it%! |
| A. | Malleable & tough |
| B. | Ductile & soft |
| C. | Brittle & hard |
| D. | None of these |
| Answer» D. None of these | |
| 35. |
A floating body oscillates about its __________ when it is displaced slightly.%! |
| A. | Centre of gravity |
| B. | Metacentre |
| C. | Centre of buoyancy |
| D. | Centre of pressure |
| Answer» C. Centre of buoyancy | |
| 36. |
Which of the following is a permanent fastening?%! |
| A. | Rivets |
| B. | Bolts |
| C. | Screws |
| D. | Keys |
| Answer» B. Bolts | |
| 37. |
Shampoos are commercially not available in the form of%! |
| A. | Powder |
| B. | Gaseous mixture |
| C. | Solution |
| D. | Emulsion |
| Answer» C. Solution | |
| 38. |
Wrought iron does not have the%! |
| A. | Uniform strength in all directions |
| B. | Ability to hold protective coating |
| C. | High ductility & corrosion resistance |
| D. | Easily weldable characteristics |
| Answer» B. Ability to hold protective coating | |
| 39. |
The phenomenon occurring during explosion of a hydrogen bomb is%! |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | A combination of both nuclear fission & fusion |
| D. | None of these |
| Answer» D. None of these | |
| 40. |
Function of feed check valve in a boiler is to%! |
| A. | Facilitate circulation of high pressure feed water |
| B. | Check the water level in the boiler drum |
| C. | Prevent the back flow of water |
| D. | Regulate the water flow to boiler |
| Answer» D. Regulate the water flow to boiler | |
| 41. |
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as%! |
| A. | Rigid |
| B. | Tough |
| C. | Ductile |
| D. | Plastic |
| Answer» D. Plastic | |
| 42. |
A coal with high __________ content will ignite most easily.%! |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Volatile matter |
| D. | Fixed carbon |
| Answer» D. Fixed carbon | |
| 43. |
In hot working, dynamic recovery occurs in%! |
| A. | Metals of low stacking fault energy |
| B. | Metals of high stacking fault energy e.g. α-iron |
| C. | Single crystal of Ni-based superalloys |
| D. | None of these |
| Answer» C. Single crystal of Ni-based superalloys | |
| 44. |
Fatigue strength of a metal is improved by%! |
| A. | Overstressing |
| B. | Scratching the surface |
| C. | Raising the temperature |
| D. | Understressing |
| Answer» E. | |
| 45. |
All radiations falling on a black body are%! |
| A. | Refracted |
| B. | Reflected |
| C. | Transmitted |
| D. | Absorbed |
| Answer» E. | |
| 46. |
Which of the following is an example of stress corrosion ?%! |
| A. | Season cracking of brass |
| B. | Caustic embrittlement of steel |
| C. | Both (a) & (b) |
| D. | Neither (a) nor (b) |
| Answer» D. Neither (a) nor (b) | |
| 47. |
The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by%! |
| A. | Decreasing the surface area of the electrodes |
| B. | Increasing the concentration of zinc sulphate solution |
| C. | Increasing the surface area of the electrodes |
| D. | Increasing the concentration of copper sulphate solution |
| Answer» E. | |
| 48. |
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.%! |
| A. | Electromagnetic |
| B. | Axial flow |
| C. | Diaphragm |
| D. | Reciprocating |
| Answer» B. Axial flow | |
| 49. |
In extrusion of metals, which of the following statement is true ?%! |
| A. | Speed of the extruded material is same as that of ram speed |
| B. | Redundant work is a function of the die angle |
| C. | Relative motion between the billet surface and the container wall is always present |
| D. | Hollow ram is used for indirect extrusion |
| Answer» E. | |
| 50. |
Leakage in a cooking gas cylinder is detected by%! |
| A. | Radio-isotopes |
| B. | Pouring soap solution on the surface and locating the gas bubbles |
| C. | Halide torch |
| D. | Pungent smell of mercaptans present in the gas |
| Answer» E. | |