The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed ( N ) is proportional to

The power number for a stirred tank becomes constant at high Reynolds

1.	The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed ( N ) is proportional to
A.	N Â°
B.	N 1
C.	N 2
D.	N 3
Answer» D. N 3

Discussion

No Comment Found

Related MCQs

Which of the following relationships between co-efficinet of friction (%u03BC) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?
Which of the following mineral dressing operations is termed as \'comminution\'?
The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond\'s law) of the energy to grind the particles from a very large size to 50 μrn is
What is the reduction ratio in a fine crushing operation having following feed and product sizes?
Filtrate flow rate in case of a rotary drum vacuum filter (in which R m < < R c ) is proportional to __________ and the cycle time (where, ? = filtrate viscosity R m = filter medium resistance R c = cake resistance ).
Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ? = density of material to be crushed, kg/m 3 here, V =? N.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)
In ball mill operation, the feed size ( D f in meters) and the ball diameter ( D b in metres) are related as ( where, K = grindability constant (varying from 0.9 to 1.4 in increasing order of hard ness))
A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 ?m/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is
For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number ( N p ) varies with N Re as
Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ? = bulk density of material, kg/m 3 )

The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed ( N ) is proportional to

Discussion

No Comment Found

Related MCQs

Reply to Comment