MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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. | |
| 2. |
The fluid property, due to which, mercury does not wet the glass is |
| A. | surface tension |
| B. | viscosity |
| C. | cohesion |
| D. | adhesion |
| Answer» B. viscosity | |
| 3. |
Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds |
| A. | 4000 |
| B. | 2100 |
| C. | 1500 |
| D. | 3000 |
| Answer» C. 1500 | |
| 4. |
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of |
| A. | Grashoff number. |
| B. | Grashoff number & Reynolds number. |
| C. | Reynolds number. |
| D. | Grashoff number & Prandtl number. |
| Answer» E. | |
| 5. |
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» B. hyperbolic | |
| 6. |
Energy of the sun arises mainly from __________ reactions. |
| A. | fusion |
| B. | fission |
| C. | combustion |
| D. | none of these |
| Answer» B. fission | |
| 7. |
Which of the following fastening devices has a head at one end and a nut fitted to the other ? |
| A. | Bolt |
| B. | Stud |
| C. | Top bolt |
| D. | None of these |
| Answer» C. Top bolt | |
| 8. |
Sudden fall of atmospheric pressure by a large amount is an indication of the |
| A. | rain |
| B. | cold wave |
| C. | storm |
| D. | fair weather |
| Answer» D. fair weather | |
| 9. |
Copper deposits are found in India at the following location: |
| A. | Kudremukh |
| B. | Kolar |
| C. | Khetri |
| D. | Ramagundam |
| Answer» D. Ramagundam | |
| 10. |
Corrosion of metals can not be prevented by its |
| A. | tempering |
| B. | chromising |
| C. | aluminising |
| D. | alloying |
| Answer» B. chromising | |
| 11. |
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body. |
| A. | grey |
| B. | black |
| C. | opaque |
| D. | white |
| Answer» B. black | |
| 12. |
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that |
| A. | compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller. |
| B. | maintaining vacuum on tube side is more difficult than that on the shell side. |
| C. | water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam. |
| D. | condenser can act as a storage unit for condensed steam. |
| Answer» D. condenser can act as a storage unit for condensed steam. | |
| 13. |
Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography. |
| A. | X-rays |
| B. | -rays |
| C. | -rays |
| D. | -rays |
| Answer» C. -rays | |
| 14. |
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 | |
| 15. |
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. | |
| 16. |
Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience. |
| A. | yield strength |
| B. | elastic limit |
| C. | proportional limit |
| D. | maximum point |
| Answer» D. maximum point | |
| 17. |
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required. |
| A. | Beryllia |
| B. | Zirconia |
| C. | Alumina |
| D. | Magnesia |
| Answer» D. Magnesia | |
| 18. |
Titanium alloys are welded using the Following process: |
| A. | TIG welding. |
| B. | Submerged arc welding. |
| C. | Butt welding. |
| D. | Electron beam welding. |
| Answer» B. Submerged arc welding. | |
| 19. |
A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is |
| A. | lead |
| B. | glass |
| C. | mica |
| D. | silver |
| Answer» B. glass | |
| 20. |
Powder metallurgy process does not make metal powder by |
| A. | atomisation |
| B. | grinding/milling |
| C. | hammering |
| D. | electrolytic deposition |
| Answer» D. electrolytic deposition | |
| 21. |
An alloy of Fe - 0.4 % C is |
| A. | cast iron. |
| B. | hypo-eutectoid steel. |
| C. | hyper-eutectoid steel. |
| D. | eutectoid steel |
| Answer» C. hyper-eutectoid steel. | |
| 22. |
The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel. |
| A. | 60 - 100 |
| B. | 400 - 700 |
| C. | 1200 -1500 |
| D. | 2000 - 2300 |
| Answer» C. 1200 -1500 | |
| 23. |
Maximum permissible air velocity in pipelines is about __________ metre/second. |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» C. 20 | |
| 24. |
Annealing ofwhite cast iron produces __________ iron. |
| A. | grey |
| B. | nodular |
| C. | malleable |
| D. | spheroidal |
| Answer» D. spheroidal | |
| 25. |
Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor) |
| A. | <i>A</i> |
| B. | <i>l</i> |
| C. | <i>A</i> |
| D. | <sup>2</sup> |
| E. | both 'a' & 'b' |
| Answer» E. both 'a' & 'b' | |
| 26. |
A solar cell converts the sunlight directly into __________ energy. |
| A. | thermal |
| B. | electrical |
| C. | mechanical |
| D. | chemical |
| Answer» C. mechanical | |
| 27. |
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor. |
| A. | critical |
| B. | breeder |
| C. | fertile |
| D. | heterogenous |
| Answer» C. fertile | |
| 28. |
Wrought iron is never shaped by |
| A. | casting |
| B. | cold working |
| C. | forging |
| D. | welding |
| Answer» B. cold working | |
| 29. |
For a particle settling in water at its terminal settling velocity, which of the following is true ? |
| A. | Buoyancy = weight + drag |
| B. | Weight = buoyancy + drag |
| C. | Drag = buoyancy + weight |
| D. | Drag = weight |
| Answer» C. Drag = buoyancy + weight | |
| 30. |
A Bingham fluid of viscosity = 10 Pa.s and yield stress, 0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is |
| A. | 10 KPa |
| B. | 20 KPa |
| C. | 30 KPa |
| D. | 40 KPa |
| Answer» C. 30 KPa | |
| 31. |
Shear stress in a fluid flowing in a round pipe |
| A. | varies parabolically across the cross-section. |
| B. | remains constant over the cross-section. |
| C. | is zero at the centre and varies linearly with the radius. |
| D. | is zero at the wall and increases linearly to the centre. |
| Answer» D. is zero at the wall and increases linearly to the centre. | |
| 32. |
The resistance wire used in a hot wire anemometer for conducting electrical current is made of |
| A. | copper |
| B. | tungsten |
| C. | chromium |
| D. | aluminium |
| Answer» C. chromium | |
| 33. |
Pressure drag does not depend upon the |
| A. | roughness of surface of the body. |
| B. | pressure of main flow only. |
| C. | length of the body in flow direction. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 34. |
__________ pumps are axial flow pumps. |
| A. | Turbine |
| B. | Propeller |
| C. | Diffuser |
| D. | none of these |
| Answer» C. Diffuser | |
| 35. |
Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid. |
| A. | 2 to 3 |
| B. | 0.01 to 0.10 |
| C. | 200 to 300 |
| D. | 100 to 1000 |
| Answer» B. 0.01 to 0.10 | |
| 36. |
Co-efficient of velocity is __________ the coefficient of discharge. |
| A. | less than |
| B. | more than |
| C. | equal to |
| D. | not related to |
| Answer» C. equal to | |
| 37. |
All pipes of a particular nominal size have the same |
| A. | inside diameter |
| B. | outside diameter |
| C. | thickness |
| D. | none of these |
| Answer» C. thickness | |
| 38. |
Maximum theoretical suction lift for water at 15 C by a centrifugal pump is 34 ft. The same for water at 90 C will be __________ ft. |
| A. | 40 |
| B. | 34 |
| C. | 8 |
| D. | 37 |
| Answer» D. 37 | |
| 39. |
With increasing flow rate, the hydraulic efficiency of a centrifugal pump |
| A. | monotonically decreases. |
| B. | decreases and then increases. |
| C. | remains constant. |
| D. | increases and then decreases. |
| Answer» B. decreases and then increases. | |
| 40. |
The velocity profile for turbulent flow through a closed conduit is |
| A. | logarithmic |
| B. | parabolic |
| C. | hyperbolic |
| D. | linear |
| Answer» B. parabolic | |
| 41. |
For the transfer of solution of thick slurry, the pump used is a __________ pump. |
| A. | reciprocating |
| B. | gear |
| C. | diaphragm |
| D. | centrifugal |
| Answer» D. centrifugal | |
| 42. |
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of |
| A. | relative roughness. |
| B. | absolute roughness. |
| C. | friction co-efficient for flows at equal Reynold number. |
| D. | all (a), (b) & (c). |
| Answer» D. all (a), (b) & (c). | |
| 43. |
Water hammer in a pipeline results from the |
| A. | bursting of pipelines due to closure by a valve. |
| B. | rapid pressure change due to a rapid change in the rate of flow. |
| C. | pressure increase due to closure of a valve resulting in decrease in rate of flow. |
| D. | none of these. |
| Answer» C. pressure increase due to closure of a valve resulting in decrease in rate of flow. | |
| 44. |
Molten soap mass is transported by a __________ pump. |
| A. | diaphragm |
| B. | reciprocating |
| C. | gear |
| D. | centrifugal |
| Answer» E. | |
| 45. |
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity |
| A. | same as that of A. |
| B. | one fourth as that of A. |
| C. | twice as that of A. |
| D. | four times as that of A. |
| Answer» C. twice as that of A. | |
| 46. |
At high Reynolds number |
| A. | inertial forces control and viscous forces are unimportant. |
| B. | viscous forces predominate. |
| C. | inertial forces are unimportant and viscous forces control. |
| D. | none of these. |
| Answer» B. viscous forces predominate. | |
| 47. |
The pitot static tube does not measure the __________ pressure. |
| A. | static |
| B. | total |
| C. | difference in static & dynamic |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 48. |
In fluid flow, cavitation is caused, if the |
| A. | fluid velocity decreases to zero. |
| B. | total energy decreases. |
| C. | both (a) and (b). |
| D. | flow pressure approaches its vapor pressure at the prevailing temperature. |
| Answer» E. | |
| 49. |
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 50. |
The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime ? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 3 |
| Answer» B. 1 | |