Hardy cross method of analysis of distribution system________________?

A. 1) involves successive trials
B. 2) takes economic aspects into account
C. 3) is time consuming
D. The correct answer is?

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

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

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

If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?

A. 1000
B. 4000
C. 100000
D. 400000

The hydraulic mean depth (HMD. for an egg-shaped sewer flowing two-third full is_______________?

A. Equal to hmd when flowing full
B. Less than hmd when flowing full
C. Greater than hmd when flowing full
D. None of the above

Sewerage system is usually designed for_________________?

A. 10 years
B. 25 years
C. 50 years
D. 75 years

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

If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be__________________?

A. 4 mm/hr
B. Lomm/hr
C. 20 mm/hr
D. 40 mm/hr

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