Question 1

As of 2013 pit latrines are used by an estimated _____________    people.

Accepted Answer

A) 1.77 billion 
B) 2.77 million 
C) 1.77 billion. 
D) 4.66 billion 
A) 1.77 billion 
B) 2.77 million 
C) 1.77 billion. 
D) 4.66 billion

Question 2

The material retained or supported by the retaining structure is called _____________

Accepted Answer

A) surcharge 
B) support wall 
C) back fill 
D) all of the mentioned 
A) surcharge 
B) support wall 
C) back fill 
D) all of the mentioned

Question 3

The first chamber in a septic tank should be at least___________of the total length.

Accepted Answer

A) 10 % 
B) 20 % 
C) 35 % 
D) 50 % 
A) 10 % 
B) 20 % 
C) 35 % 
D) 50 %

Question 4

The coefficient of earth pressure when the soil is at equilibrium is _____________

Accepted Answer

A) ?v /?h 
B) ?h /?v 
C) ?v × ?h 
D) ?1 / ?3 
A) ?v /?h 
B) ?h /?v 
C) ?v × ?h 
D) ?1 / ?3

Question 5

The wedge-shaped portion of the backfill tending to move with the wall is called

Accepted Answer

A) wedge fall 
B) active fall 
C) failure wedge 
D) none of the mentioned 
A) wedge fall 
B) active fall 
C) failure wedge 
D) none of the mentioned

As of 2013 pit latrines are used by an estimated _____________ people.

The material retained or supported by the retaining structure is called _____________