Related Questions

According to IS classification, the range of silt size particles is
A 4.75 mm to 2.00 mm
B 2.00 mm to 0.425 mm
C 0.425 mm to 0.075 mm
D 0.075 mm to 0.002 mm
The Zaskar range, the Ladakh range, the Kailas and the Karakoram Range are the main ranges of:
A The Western Ghat
B The Aravali
C The Himalayan system
D The Eastern Ghat
__________ are used for the separation of coarse particles from a slurry of fine particles.
A Thickeners
B Classifiers
C Hydrocyclones
D Decanters
For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A, B or C
For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A, B or C
The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is
A 0.5
B 1
C 2
D 0.33
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is
A $$\frac{{24}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
B $$\frac{{16}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
C $$\frac{{64}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
D $$\frac{{48}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
Size measurement of ultrafine particles can be best expressed in terms of
A Centimetre
B Screen size
C Micron
D Surface area per unit mass
Suspension particles have the size between
A 10–2 – 10–4 cm
B 10–5 – 10–7cm
C 10–8 – 10–10cm
D 10–1 – 10–2 cm
The effective size of sand particles used in slow sand filters is
A 0.25 to 0.35 mm
B 0.35 to 0.60 mm
C 0.60 to 1.00 mm
D 1.00 to 1.80 mm

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