1. High turbidity of water can be determined by
B) Baylis turbidimeter
2. The maximum acidity in water will occur at a pH of
A) 0
3. A valve which allows the water to flow in one direction but prevents its flow in the reverse direction is known as
B) Reflux valve
4. For the sewers of diameter more than 600 mm, _______ joint is preferred.
B) collar
5. For large cities, the most suitable method for forecasting population is
C) Arithmetical increase method
6. Membrane filter technique is used for testing
A) Microbiological contamination
7. Which of the following tests employs ETDA as a titrating agent?
C) Hardness
8. In chlorination technique adopted for disinfecting the water, the minimum time of contact should be
B) 20 min
9.
D) શામળદાસ ગાંધી
10.
A) કંડલા
11.
C) અનસુયાબેન
12.
A) ડભોઈનો કિલ્લો – ચૌલાદેવી
13.
A) નાગભટ્ટ-II
14.
A) ભાવનગર
15.
C) ઔરંગઝેબ
