Practice Test: Question Set - 22
1. The four major water supply distribution systems, are
- (A) Dead
end, tree, grid iron and reticulation
- (B) Dead
end, tree, grid iron and circular
- (C) Tree,
grid iron, ring and radial
- (D) Tree,
reticulation, circular and ring
2. Pick up the correct statement from the following:
- (A) For
determination of small color intensities, tintometer is generally used
- (B) The
odour of water sample is generally measured by a term called odour intensity
- (C) The
color of water sample may be detected by Nessler tube
- (D) All the
above
3. The type of joint generally used in cast iron pipes, is
- (A) Socket and
spigot joint
- (B) Flanged
joint
- (C) Dresser
coupling joint
- (D) All
the above
4. The percentage of chlorine in fresh bleaching powder is roughly
- (A) 50 to 60
- (B) 30 to 35
- (C) 40 to 50
- (D) 20 to 25
5. Normal values of overflow rate for plain sedimentation tank using coagulants, is
- (A) 750 to 1000
liters/hr/m2
- (B) 1000 to 1250
liters/hr/m2
- (C) 1250 to 1500
liters/hr/m2
- (D) 1500
liters/hr/m2
6. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called
- (A) Working
pressure
- (B) Design
pressure
- (C) Test
pressure
- (D) Hydrostatic
pressure
7. Growth of population can be conveniently represented by
- (A) An
arithmetical curve
- (B) A
semi-logarithmic curve
- (C) A
logistic curve
- (D) A straight
line curve
8. An aquiclude is
- (A) A non
artesian aquifer
- (B) An
artesian aquifer
- (C) A
confined bed of impervious material between aquifers
- (D) A
large water body underground
9. The pH value of water fit for drinking, is
- (A) 13
- (B) 11
- (C) 9
- (D) 7
10. The coefficient of permeability of soils, is generally expressed in
- (A) cm/sec
- (B) cm/minute
- (C) cm2/sec
- (D) cm2/minute
11. Standard process of chlorination of water, is done by
- (A) Plain
chlorination
- (B) Pre-chlorination
- (C) Post-chlorination
- (D) Double
chlorination
12. Pressure exerted at 90° bend in a pipe of cross-sectional area A and carrying water with a velocity V under a pressure p, is
- (A) [pA + (w/g) AV]
- (B) 2 [pA + (w/g) AV²]
- (C) √2 [pA + (w/g) AV²]
- (D) √3 [pA + (w/g) A²V]
13. Service connections to consumers houses, are generally provided with
- (A) Copper pipes
- (B) Hume pipes
- (C) Galvanized
iron pipes
- (D) P.V.C. pipes
14. The permissible pH value for public water supplies may range between
- (A) 4.5 to 5.5
- (B) 5.5 to 6.5
- (C) 6.5 to 8.5
- (D) 8.5 to 10.5
15. In the equation P = PS/[1 + loge-1 (nt)] of a logistic curve of population growth, the constant m is
- (A) Ps × P
- (B) PS/P
- (C) (PS - Po)/Po
- (D) KPs
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