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 pair is correctly matched?%! |
| A. | Heat transfer: Thermal diffusivity |
| B. | Mass transfer: Diffusion co-efficient |
| C. | Momentum transfer: Kinematic viscosity |
| D. | All of the above |
| Answer» E. | |
| 2. |
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.%! |
| A. | Rapid sand |
| B. | Pressure |
| C. | Gravity |
| D. | Slow sand |
| Answer» C. Gravity | |
| 3. |
Maximum carbon content in cast iron is __________ percent.%! |
| A. | 3.8 |
| B. | 4 |
| C. | 4.3 |
| D. | 4.6 |
| Answer» D. 4.6 | |
| 4. |
About __________ ton of coke is required in a cupola to produce one ton of casting.%! |
| A. | 0.03 |
| B. | 0.3 |
| C. | 0.8 |
| D. | 1.5 |
| Answer» C. 0.8 | |
| 5. |
For preparation of porous bearings by powder metallurgy, preferred particle shape is%! |
| A. | Spherical |
| B. | Nodular |
| C. | Irregular |
| D. | No preferred shape |
| Answer» B. Nodular | |
| 6. |
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 | |
| 7. |
Insulation of liquid surface can be achieved by __________ on top of its surface.%! |
| A. | Floating hollow polypropylene spheres |
| B. | Spraying alumina powder |
| C. | Putting cement |
| D. | None of these |
| Answer» B. Spraying alumina powder | |
| 8. |
At the point of boundary layer separation in fluid flow, the%! |
| A. | Shear stress is maximum |
| B. | Velocity gradient is flat |
| C. | Density variation is maximum |
| D. | Shear stress is zero |
| Answer» B. Velocity gradient is flat | |
| 9. |
Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.%! |
| A. | Invar |
| B. | Hastealloy |
| C. | Duralumin |
| D. | Monel metal |
| Answer» B. Hastealloy | |
| 10. |
The majority charge carriers in p-type silicon are%! |
| A. | Free electrons |
| B. | Ions |
| C. | Conduction electrons |
| D. | Holes |
| Answer» E. | |
| 11. |
Annealing of cast iron%! |
| A. | Softens it to facilitate machining |
| B. | Decreases the free carbon |
| C. | Increases the strength |
| D. | None of these |
| Answer» B. Decreases the free carbon | |
| 12. |
Reduction reaction involves the%! |
| A. | Loss of electrons |
| B. | Increase in oxidation number |
| C. | Gain of electrons |
| D. | Addition of oxygen |
| Answer» D. Addition of oxygen | |
| 13. |
Which of the following properties of a solid is not dependent on crystal imperfection ?%! |
| A. | Ductility |
| B. | Semiconductiyity |
| C. | Melting point |
| D. | Yield stress |
| Answer» D. Yield stress | |
| 14. |
Ganister contains maximum percentage of%! |
| A. | FeO |
| B. | SiO‚ÇÇ |
| C. | MgO |
| D. | MnO‚ÇÇ |
| Answer» C. MgO | |
| 15. |
Nickel is a __________ material.%! |
| A. | Ferromagnetic |
| B. | Semi-conductor |
| C. | Paramagnetic |
| D. | Ferroelectric |
| Answer» B. Semi-conductor | |
| 16. |
Ceramic compounds as compared to metallic compounds%! |
| A. | Crystallise faster |
| B. | Resist greater tensile stress at room temperature |
| C. | Have higher melting temperature |
| D. | Are better conductor of electricity at higher temperature |
| Answer» D. Are better conductor of electricity at higher temperature | |
| 17. |
The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.%! |
| A. | Casting |
| B. | Pattern |
| C. | Draft |
| D. | Distoration |
| Answer» D. Distoration | |
| 18. |
Ceramic materials are%! |
| A. | Organic in nature |
| B. | Stronger in compression than in tension |
| C. | Always amorphous in nature |
| D. | Always bad heat conductors |
| Answer» C. Always amorphous in nature | |
| 19. |
Which is the most lethal weapon ?%! |
| A. | Atom (fusion) bomb |
| B. | Hydrogen bomb |
| C. | Cobalt bomb |
| D. | Neutron bomb |
| Answer» D. Neutron bomb | |
| 20. |
Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8%! |
| A. | °C |
| B. | °F |
| C. | °K |
| D. | °R |
| Answer» C. ¬¨‚àûK | |
| 21. |
A jet engine turbine blade is normally manufactured by%! |
| A. | Forging |
| B. | Shell moulding |
| C. | Investment casting |
| D. | Pressure die casting |
| Answer» D. Pressure die casting | |
| 22. |
Scab is a defect developed during __________ of metals.%! |
| A. | Forging |
| B. | Sand casting |
| C. | Machining |
| D. | Welding |
| Answer» C. Machining | |
| 23. |
Fibrous fracture is normally encountered in the __________ materials.%! |
| A. | Hard |
| B. | Elastic |
| C. | Ductile |
| D. | Brittle |
| Answer» D. Brittle | |
| 24. |
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?%! |
| A. | Emissivity of pipe surface |
| B. | Diameter & length of the pipe |
| C. | Temperature of hot pipe surface & that of air in the room |
| D. | None of these |
| Answer» E. | |
| 25. |
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the%! |
| A. | Specific fuel consumption is very low due to the use of heavy water |
| B. | Fuel cost is much lower than that used in pressurised water or boiling water reactor |
| C. | Heavy water is used both as coolant as well as moderator |
| D. | Both B and C |
| Answer» E. | |
| 26. |
The excess air required for the combustion of pulverised coal is of the order of about __________ percent.%! |
| A. | 5 |
| B. | 15 |
| C. | 30 |
| D. | 45 |
| Answer» C. 30 | |
| 27. |
Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same%! |
| A. | Period increases |
| B. | Period decreases |
| C. | Group increases |
| D. | Both 'b' & 'c' |
| Answer» E. | |
| 28. |
An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.%! |
| A. | Adiabatic |
| B. | Isothermal |
| C. | Isentropic |
| D. | Isochoric |
| Answer» C. Isentropic | |
| 29. |
The joint for soldering is supported by binding wire made of%! |
| A. | Mild steel |
| B. | Copper |
| C. | Soft iron |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 30. |
Fire refining process is employed in case of%! |
| A. | Tin |
| B. | Copper |
| C. | Zinc |
| D. | Aluminium |
| Answer» C. Zinc | |
| 31. |
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?%! |
| A. | 159 |
| B. | 1837 |
| C. | 2537 |
| D. | 10000 |
| Answer» D. 10000 | |
| 32. |
A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².%! |
| A. | 6 |
| B. | 18 |
| C. | 38 |
| D. | 52 |
| Answer» C. 38 | |
| 33. |
A solar cell converts the sunlight directly into __________ energy.%! |
| A. | Thermal |
| B. | Electrical |
| C. | Mechanical |
| D. | Chemical |
| Answer» C. Mechanical | |
| 34. |
Material having maximum density is%! |
| A. | Plutonium |
| B. | Osmium |
| C. | Titanium |
| D. | Uranium |
| Answer» C. Titanium | |
| 35. |
Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.%! |
| A. | 20 |
| B. | 80 |
| C. | 120 |
| D. | 500 |
| Answer» D. 500 | |
| 36. |
Device used as a standard for the calibration of pressure gauges is a%! |
| A. | Bellow |
| B. | Diaphragm |
| C. | Dead weight pressure tester |
| D. | Mercury manometer |
| Answer» D. Mercury manometer | |
| 37. |
Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.%! |
| A. | 0.8 |
| B. | 7.8 |
| C. | 200 |
| D. | 10000 |
| Answer» B. 7.8 | |
| 38. |
As the fluid flow rate increases, the float of the rotameter%! |
| A. | Rises in the tube |
| B. | Rotates at higher speed |
| C. | Rotates at lower speed |
| D. | Drops down in the tube |
| Answer» B. Rotates at higher speed | |
| 39. |
Electrolytes conduct electric current by%! |
| A. | The movement of ions |
| B. | The movement of molecules |
| C. | Allowing electrons to flow through them from cathode to anode |
| D. | Movement of electric charge through them |
| Answer» B. The movement of molecules | |
| 40. |
Even though heat transfer co-efficients in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.%! |
| A. | Film |
| B. | Nucleate |
| C. | Transition |
| D. | All of the above |
| Answer» B. Nucleate | |
| 41. |
*$___________ remains constant during the adiabatic cooling of moist air.? |
| A. | Wet bulb temperature |
| B. | Dry bulb temperature |
| C. | Relative humidity |
| D. | Specific humidity |
| Answer» B. Dry bulb temperature | |
| 42. |
*$_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 | |
| 43. |
*$_Which of the following is the largest quantum of pressure?? |
| A. | 1 kg/cm² |
| B. | 1 bar |
| C. | 1 atmosphere |
| D. | 1 kilo Pascal |
| Answer» D. 1 kilo Pascal | |
| 44. |
*$_Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when? |
| A. | Strain rate is increased |
| B. | Grain size is increased |
| C. | Prior cold deformation is increased |
| D. | Not affected by any of the above parameters |
| Answer» B. Grain size is increased | |
| 45. |
*$_Absolute zero pressure can be attained at a temperature of? |
| A. | 0°C |
| B. | 50°K |
| C. | 0°R |
| D. | None of these |
| Answer» D. None of these | |
| 46. |
*$_Which drug is made from vegetables ?? |
| A. | Pencilin |
| B. | Aspirin |
| C. | Quinine |
| D. | Insulin |
| Answer» D. Insulin | |
| 47. |
*$_Addition of silicon to cast iron? |
| A. | Promotes graphite module formation |
| B. | Improves its ductility |
| C. | Does not promote graphite flakes formation |
| D. | Increases the fluidity of molten metal |
| Answer» E. | |
| 48. |
*$_The entropy change for a spontaneous process is? |
| A. | > 0 for the system |
| B. | < 0 for the system |
| C. | > 0 for the system & the surrounding |
| D. | < 0 for the system & the surrounding |
| Answer» E. | |
| 49. |
*$___________ addition increases the depth of hardness of steel.? |
| A. | Chromium |
| B. | Nickel |
| C. | Tungsten |
| D. | Vanadium |
| Answer» B. Nickel | |
| 50. |
*$_Chromium molybdenum steel can not be welded using __________ welding.? |
| A. | Thermit |
| B. | Electrical resistance |
| C. | Oxy-acetylene |
| D. | Any of these |
| Answer» C. Oxy-acetylene | |