Engineering :: Public Health Engineering

@ : Home > Civil Engineering > Public Health Engineering

101.

The maximum permissible quantity of lead in water for domestic supplies is

A.	0.01 ppm	B.	0.05 ppm
C.	0.50 ppm	D.	1 ppm

102.

The copper contents in water for domestic purposes should not be

less than

more than

103.

Sodium carbonate causes

hardness

softness

104.

Hard water may cause bursting of boilers.

Agree

Disagree

105.

The maximum permissible fluorine content in water for domestic supplies should be

A.	0.15 ppm	B.	1.5 ppm
C.	15 ppm	D.	150 ppm

106.

Sphere shaped bacterias are called

A.	spirilla	B.	bacilli
C.	cocci	D.	trichobacteria

107.

B-coli or E-coli are harmless organisms but their presence in water indicates the

A.	presence of pathogenic bacteria	B.	absence of pathogenic bacteria
C.	presence of non-pathogenic bacteria	D.	absence of non-pathogenic bacteria

108.

Membrane filter technique is used for testing

A.	E-coli	B.	copper
C.	pathogenic bacterias	D.	none of these

109.

Water is

safe

harmful

110.

The bacteria which require oxygen for their survival is known as

A.	anaerobic bacteria	B.	pathogenic bacteria
C.	aerobic bacteria	D.	non-pathogenic bacteria