Specific __________ is a dimensionless quantity.
Heat
Humidity
Weight
None of these
Correct Answer :
D. None of these
Related Questions
Pressure exerted by a liquid depends upon its
Surface tension
Density
Viscosity
Buoyancy
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the
Range is 15°F
Approach is 10°F
Both (A) & (B)
Neither (A) nor (B)
__________ is a special constituent of chlorophyll without which photosynthesis is not possible.
Calcium
Nitrogen
Phosphorous
Hydrogen
Unit of viscosity in CGS system is
Ganister contains maximum percentage of
FeO
SiO2
MgO
MnO2
Annealing of cast iron
Softens it to facilitate machining
Decreases the free carbon
Increases the strength
None of these
In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is
Less
More
Equal
Unpredictable
Powder metallurgy is used to produce
High precision components with complex cavities and sharp features
Components of large size
Porosity free components
Components of such alloys whose constituents do not form alloys readily
Which one is neutral in character?
N2O4
N2O
N2O5
N2O3
Silicon percentage in silicon steel used for electrical equipments is about
1
4.0
8
14
High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
5 to 10
15 to 25
45 to 50
75 to 80
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
Strain rate is increased
Grain size is increased
Prior cold deformation is increased
Not affected by any of the above parameters
Good design of the casing of a centrifugal pump aims at minimising the
Cavitation
Frictional losses
Kinetic energy loss
Static head
In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be
Higher, as it gives higher wavelength
Lower, as it gives higher wavelength
Higher, as it gives shorter wavelength
Lower, as it gives shorter wavelength
Percentage of argon (by volume) in dry atmospheric air is about
0.09
0.3
0.57
0.94
The dew point of moist air becomes __________ with decrease in its relative humidity.
Less than the wet bulb temperature
More than the wet bulb temperature
More than the dry bulb temperature
Equal to wet bulb temperature
Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
1
10
25
50
Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
Sorbite
Bainite
Martensite
Troostite
Heating of ferromagnetic materials to a temperature above Curie temperature makes it
Insulator for heat & electricity transmission
Ferritic
Behave like paramagnetic materials
Superconductor
Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.
Decreases
Increases
Remain same
May increase or decrease
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.
Hard
Soft
Silicon carbide
Aluminium oxide
Quartz is a __________ material.
Diamagnetic
Ferromagnetic
Ferroelectric
Piezoelectric
The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
7 and 30
10 and 50
2 and 50
13 and 55
In a good rimming steel
Carbon and silicon should be low
Silicon should be low but carbon should be high
Both silicon & carbon should be high
Silicon should be high but carbon should be low
The atmospheric temperature during melting of ice/snow (in the atmosphere)
Decreases
Increases
Remain same
May increase or decrease; depends on the altitude where snow melts
__________ property of a material is determined by the Herbert Pendulum device.
Hardness
Tensile
Toughness
Compressive
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)
T
1/T
T2
1/T2
The product out from a cupola is called
Wrought iron
Pig iron
Cast iron
None of these
Fahrenheit and Centigrade scales have the same readings at
-55°
-40°
-33°
-58°
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
Tin
Lead
Zinc
Glass