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.
| 51. |
What is the normal range of exit cone angle of a venturimeter ? |
| A. | 2 to 5 |
| B. | 7 to 15 |
| C. | 15 to 25 |
| D. | >25 |
| Answer» C. 15 to 25 | |
| 52. |
Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum |
| A. | flow rate |
| B. | mean velocity |
| C. | both 'a' & 'b' |
| D. | neither 'a' nor 'b' |
| Answer» C. both 'a' & 'b' | |
| 53. |
Most commonly used joint in the underground pipe lines is the |
| A. | sleevejoint |
| B. | coupling |
| C. | flange |
| D. | expansion joint |
| Answer» B. coupling | |
| 54. |
Schedule number of a pipe, which is a measure of its wall thickness, is given by |
| A. | 1000 P'/S |
| B. | 100 P'/S |
| C. | 1000 S/P' |
| D. | 10000 P'/S |
| Answer» B. 100 P'/S | |
| 55. |
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the |
| A. | discharge. |
| B. | suction. |
| C. | suction minus vapor pressure of the liquid at suction temperature. |
| D. | discharge minus vapor pressure of the liquid at the discharge temperature. |
| Answer» D. discharge minus vapor pressure of the liquid at the discharge temperature. | |
| 56. |
Which of the following denotes the effect of compressibility in fluid flow ? |
| A. | Weber number |
| B. | Mach number |
| C. | Euler number |
| D. | Reynolds number |
| Answer» C. Euler number | |
| 57. |
Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe. |
| A. | smaller than |
| B. | larger than |
| C. | same as |
| D. | twice |
| Answer» B. larger than | |
| 58. |
The terminal velocity of a small sphere settling in a viscous fluid varies as the |
| A. | first power of its dimeter. |
| B. | inverse of the fluid viscosity. |
| C. | inverse square of the diameter. |
| D. | square of the difference in specific weights of solid & fluid. |
| Answer» C. inverse square of the diameter. | |
| 59. |
If the discharge of a centrifugal pump is throttled, then its suction lift |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| D. | data insufficient to predict |
| Answer» B. decreases | |
| 60. |
Foot valves provided in pumps are __________ valves. |
| A. | relief |
| B. | three/four way |
| C. | pressure reducing |
| D. | directional control |
| Answer» E. | |
| 61. |
The maximum delivery pressure of compressors can be upto __________ atmospheres. |
| A. | 10 |
| B. | 100 |
| C. | 250 |
| D. | 1000 |
| Answer» E. | |
| 62. |
Fog is an example of colloidal system of |
| A. | solid dispersed in gas. |
| B. | solid dispersed in liquid. |
| C. | liquid dispersed in gas. |
| D. | gas dispersed in liquid. |
| Answer» D. gas dispersed in liquid. | |
| 63. |
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 | |
| 64. |
Auto collimator is used to check |
| A. | flatness |
| B. | angle |
| C. | rotor balancing |
| D. | roughness |
| Answer» C. rotor balancing | |
| 65. |
The following type of bonding is strongly directional in solids. |
| A. | Vander Waal's |
| B. | Ionic |
| C. | Metallic |
| D. | Covalant |
| Answer» E. | |
| 66. |
A high pressure boiler generates steam at a pressure greater than __________ kg/cm2 . |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 80 |
| Answer» E. | |
| 67. |
Evaporative cooling process employs a combination of cooling and humidification in which the |
| A. | sensible heat is added. |
| B. | sensible heat is removed and the latent heat is added. |
| C. | latent heat is removed. |
| D. | sensible heat is added and latent heat is removed. |
| Answer» C. latent heat is removed. | |
| 68. |
Which of the following is not an explosive ? |
| A. | TNT |
| B. | CMC |
| C. | RDX |
| D. | Lead azide |
| Answer» C. RDX | |
| 69. |
Maxwell's thermodynamic relations applies to the |
| A. | chemical systems in equilibrium. |
| B. | mechanical systems in equilibrium. |
| C. | irreversible thermodynamic processes. |
| D. | reversible thermodynamic processes. |
| Answer» B. mechanical systems in equilibrium. | |
| 70. |
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating. |
| A. | cementite |
| B. | austenite |
| C. | martensite |
| D. | pearlite |
| Answer» C. martensite | |
| 71. |
Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV. |
| A. | 20 |
| B. | 200 |
| C. | 500 |
| D. | 1000 |
| Answer» C. 500 | |
| 72. |
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. | |
| 73. |
Machinability of hard alloys and tool steels is improved by |
| A. | spherodising |
| B. | annealing |
| C. | tempering |
| D. | normalising |
| Answer» C. tempering | |
| 74. |
When the momentum of one fluid is used for moving another fluid, such a device is called a/an |
| A. | jet pump |
| B. | blower |
| C. | acid egg |
| D. | none of these |
| Answer» B. blower | |
| 75. |
The normal stress is the same in all directions at a point in a fluid, when the fluid is |
| A. | non-viscous. |
| B. | incompressible. |
| C. | both (a) and (b). |
| D. | having no motion of one fluid layer relative to the other. |
| Answer» E. | |
| 76. |
Head developed by a centrifugal pump depends on its |
| A. | speed |
| B. | impeller diameter |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 77. |
Tin based white metals are used, where bearings are subjected to |
| A. | high pressure & load. |
| B. | low pressure & load. |
| C. | high temperature. |
| D. | large surface wear. |
| Answer» B. low pressure & load. | |
| 78. |
Friction factor for fluid flow in pipe does not depend upon the |
| A. | pipe length. |
| B. | pipe roughness. |
| C. | fluid density & viscosity. |
| D. | mass flow rate of fluid. |
| Answer» B. pipe roughness. | |
| 79. |
All of the following alloying elements of steel increases hardness but sacrifice ductility, except |
| A. | nickel |
| B. | vanadium |
| C. | molybdenum |
| D. | chromium |
| Answer» B. vanadium | |
| 80. |
Power loss in an orificemeter is __________ that in a venturimeter. |
| A. | less than |
| B. | same as |
| C. | more than |
| D. | data insufficient, cannot be predicted |
| Answer» D. data insufficient, cannot be predicted | |
| 81. |
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid. |
| A. | Bingham |
| B. | Newtonion |
| C. | perfect |
| D. | none of these |
| Answer» C. perfect | |
| 82. |
Which of the following is not concerned with the fluid-particle interaction ? |
| A. | Drag co-efficient |
| B. | Froude number |
| C. | Galileo number |
| D. | Weber number |
| Answer» E. | |
| 83. |
The Navier-Stokes equation deals with the law of conservation of |
| A. | mass |
| B. | energy |
| C. | both (a) & (b) |
| D. | momentum |
| Answer» E. | |
| 84. |
The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s). |
| A. | 24000 |
| B. | 24 |
| C. | 0.24 |
| D. | 0.44 |
| Answer» E. | |
| 85. |
For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe , plot is |
| A. | 1 |
| B. | -1 |
| C. | 0.5 |
| D. | -0.5 |
| Answer» C. 0.5 | |
| 86. |
In the blast furnace, incorporation of water vapour in the blast gives the following effect. |
| A. | Increases the reducing potential of the gas. |
| B. | Increases the flame temperature. |
| C. | No significant change occurs. |
| D. | Increases the hydrogen content in the metal. |
| Answer» B. Increases the flame temperature. | |
| 87. |
Salvage value is the most flexible criteria for analysing a financial investment. 'Salvaging' means |
| A. | disposing off a machine/property on as is where is basis. |
| B. | disposing off machine/property, which is no longer useful in the present scenerio. |
| C. | mortgaging the obsolete machine/property. |
| D. | writing off the obsolete machine/ property. |
| Answer» C. mortgaging the obsolete machine/property. | |
| 88. |
Titanium can be easily welded using __________ welding. |
| A. | submerged arc |
| B. | TIG |
| C. | shielded metal arc |
| D. | electroslag |
| Answer» C. shielded metal arc | |
| 89. |
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the |
| A. | pipe length |
| B. | fluid velocity in the pipe |
| C. | time taken to close the valve |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 90. |
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062. |
| A. | 10 m |
| B. | 11 m |
| C. | 12 m |
| D. | 20 m |
| Answer» C. 12 m | |
| 91. |
The rate of change of moment of momentum represents the __________ by the fluid. |
| A. | torque applied |
| B. | force exerted |
| C. | work done |
| D. | power developed |
| Answer» B. force exerted | |
| 92. |
Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about |
| A. | 0.42 |
| B. | 0.62 |
| C. | 0.82 |
| D. | 0.98 |
| Answer» C. 0.82 | |
| 93. |
The curve of metacentre for a floating body __________ the curve of buoyancy. |
| A. | is always below |
| B. | is the evolute of |
| C. | intersects at right angle |
| D. | is tangential to |
| Answer» C. intersects at right angle | |
| 94. |
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics. |
| A. | piston |
| B. | gear |
| C. | positive displacement |
| D. | sump |
| Answer» C. positive displacement | |
| 95. |
Which of the following is a Newtonian fluid? |
| A. | Rubber latex |
| B. | Sewage sludge |
| C. | Quicksand |
| D. | Non-colloidal solution |
| Answer» E. | |
| 96. |
Froude number is the ratio of |
| A. | shear stress to gravitational stress. |
| B. | drag stress to shear stress. |
| C. | inertial stress to shear stress. |
| D. | inertial stress to gravitational stress. |
| Answer» E. | |
| 97. |
Pick out the correct statement pertaining to the flow through a converging-diverging tube. |
| A. | The value of Mach number is always unity at the throat. |
| B. | No shock wave develops in the tube when the Mach number at exit is greater than unity. |
| C. | Throughout the converging portion of the tube, the density increases in the downstream direction. |
| D. | none of these. |
| Answer» C. Throughout the converging portion of the tube, the density increases in the downstream direction. | |
| 98. |
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water) |
| A. | 39.6y |
| B. | 48y |
| C. | 49.2y |
| D. | 58y |
| Answer» C. 49.2y | |
| 99. |
For the same terminal conditions and fitting size, the least friction loss is incurred in a/an |
| A. | T-joint |
| B. | union |
| C. | 45 elbow |
| D. | 90 bend |
| Answer» C. 45 elbow | |
| 100. |
The order of a chemical reaction |
| A. | can be determined only experimentally |
| B. | can be determined from the stoichiometry of the reaction. |
| C. | can not be zero. |
| D. | can be fractional. |
| Answer» C. can not be zero. | |