Flow rate of sludge is not measured by a/an

For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

A

4.5 to 6.0

B

6.5 to 8.0

C

8.5 to 10.0

D

10.5 to 12.0

For normal sludge, the value of sludge index for Indian conditions is

A

0 to 50

B

50 to 150

C

150 to 350

D

350 to 500

Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is

A

$$\frac{{\text{Q}}}{2}$$

B

$$\frac{{\text{Q}}}{4}$$

C

$$\frac{{\text{Q}}}{8}$$

D

$$\frac{{\text{Q}}}{{16}}$$

Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a

A

Magnetic flowmeter

B

Pitot tube

C

Flow nozzle type flowmeter

D

Turbine flowmeter

Liquid flow rate in an open channel can not be measured by a/an

A

Orifice meter

B

Cipolletti weir

C

Rectangular weir

D

V-notch

The rate of accumulation of sludge in septic tanks is recommended as

A

30 litres/person/year

B

25 litres/person/year

C

30 litres/person/month

D

25 litres/person/month

The rate of accumulation of sludge per person per year, is

A

10 litres

B

15 litres

C

20 litres

D

25 litres

To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

A

Increase both 'G' and 'S'

B

Decrease both 'G' and 'S'

C

Increase 'S' and decrease 'G'

D

Increase 'G' and decrease 'S'

Flow rate of a river is measured by a/an

A

Pitot tube

B

Vane meter

C

Kennison nozzle

D

Open weir

Liquid flow rate in a small channel is best measured by a/an

A

Weir

B

Pitot tube

C

Vane meter

D

Venturimeter

Flow rate of sludge is not measured by a/an

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