1 >>The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is ?
- (A) reflux valve
- (B) sluice valve
- (C) air relief valve
- (D) pressure relief valve
2 >>A sewer that receives the discharge of a number of house sewers is called ?
- (A) house sewer
- (B) lateral sewer
- (C) intercepting sewer
- (D) submain sewer
3 >>pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called ?
- (A) house sewer
- (B) lateral sewer
- (C) main sewer
- (D) submain sewer
4 >>For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be ?
- (A) separate system
- (B) combined system
- (C) partially combined system
- (D) partially separate system
5 >>Average rate of water consumption perhead per day as per Indian Standard is ?
- (A) 100 litres
- (B) 135 litres
- (C) 165 litres
- (D) 200 litres
6 >>Sewerage system is usually designed for ?
- (A) 10 years
- (B) 25 years
- (C) 50 years
- (D) 75 years
7 >>Which of the following sewers is preferred for combined system of sewage ? ?
- (A) circular sewer
- (B) egg shaped sewer
- (C) rectangular sewer
- (D) none of the above
8 >>The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is ?
- (A) separate system
- (B) combined system
- (C) partially separate system
- (D) partially combined system
9 >>The specific gravity of sewage is ?
- (A) much greater than 1
- (B) slightly less than 1
- (C) equal to 1
- (D) slightly greater than 1
10 >>The slope of sewer shall be ?
- (A) given in the direction of natural slope of ground
- (B) given in the direction opposite to natural slope of ground
- (C) zero
- (D) steeper than 1 in 20
11 >>Pick up the correct statement from the following : ?
- (A) The portion of pellicular water which remains unutilised, is called hygroscopic water
- (B) The moisture content at which permanent wilting of plants takes place, is called the wilting point
- (C) The moisture deficiency will be different at different points
- (D) All the above
12 >>The main factor which affects the infiltration capacity, is ?
- (A) thickness of saturated layer
- (B) depth of surface detention
- (C) soil moisture
- (D) all the above
13 >>Absolute humidity in air ?
- (A) decreases at higher altitudes
- (B) increases at higher altitudes
- (C) remains constant at all altitudes
- (D) none of these
14 >>Precipitation caused by lifting of an air mass due to the pressure difference, is called ?
- (A) cyclonic precipitation
- (B) convective precipitation
- (C) orographic precipitation
- (D) none of these
15 >>The standard height of a standard rain gauge, is ?
- (A) 10 cm
- (B) 20 cm
- (C) 30 cm
- (D) 50 cm
16 >>In India, rain fall is generally recorded at ?
- (A) 8 A.M.
- (B) 12 Noon
- (C) 4 P.M.
- (D) 8 P.M
17 >>A recording type rain gauge ?
- (A) produces a mass curve of rain fall
- (B) records the cumulative rain
- (C) is sometimes called integrating rain gauge or continuous rain gauge
- (D) all the above
18 >>In India the recording type rain gauge generally used, is ?
- (A) weighing type
- (B) tipping type
- (C) float recording type
- (D) none of these
19 >>The deficiency in rain catch due to vertical acceleration of air forced upward over the gauge, is ?
- (A) greater for heavy rain
- (B) greater for lighter rain
- (C) greater for large drops
- (D) lesser for small rain drops
20 >>If a gauge is installed perpendicular to the slope, its measurement is reduced by multiplying ?
- (A) sine of the angle of inclination with vertical
- (B) cosine of the angle of inclination with vertical
- (C) tangent of the angle of inclination with vertical
- (D) calibration coefficient of the gauge
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