Related Questions

A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
A 45
B 60
C 80
D 95
For flow past a flat plate, if x is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to
A $$\sqrt {\text{x}} $$
B $$\frac{1}{{\sqrt {\text{x}} }}$$
C x
D $$\frac{1}{{\text{x}}}$$
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?
A 0.5
B 1
C 1.5
D 2
The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number.
A Increases
B Decreases
C Remains same
D May increase or decrease
A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is
A v
B 2v
C 4v
D 8v
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to
A $$ - \frac{1}{3}$$
B $$ - \frac{2}{3}$$
C 1
D $$-1$$
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is
A [

A.

B. 1

B > 1
C 2
Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is
A 1
B > 1
C > 5
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above

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