WATER OPERATOR LEVEL 1 CERTIFICATION EXAM QUESTIONS
WITH CORRECT ANSWERS
1) What US agency establishes drinking water standards -- Answer ✔✔ USEPA
2) What disease is capable of being transmitted by water -- Answer ✔✔ typhoid
3) When any piece of electrical equipment is being worked on, the circuit breaker
should be -- Answer ✔✔ de-energized and locked out
4) In ammonia vapor is passed over a chlorine leak in a cylinder valve, the presence of
the leak is indicated by a -- Answer ✔✔ white cloud
5) What directly impacts the treatment of drinking water -- Answer ✔✔ Safe Drinking
Water Act
6) corrosive water acting on a customer's plumbing may cause what metals to enter
their drinking water -- Answer ✔✔ lead
7) What is the most common water complaint -- Answer ✔✔ objectionable taste
and/or odor
, 8) According to the Surface Water Treatment Rule, water systems serving a population
greater than 500 persons must sample the filtered water for turbidity every --
Answer ✔✔ 4 hours
9) For surface water systems without filtration, the Surface Water Treatment Rule
requires public water systems to -- Answer ✔✔ maintain a CxT value above the
minimum value
10) Surface water systems must treat, at a minimum, for -- Answer ✔✔ coliform
bacteria and turbidity
11) If a water sample tests positive for coliforms, the system must collect a set of repeat
samples within -- Answer ✔✔ 24 hours
12) A public water system has at least _____ service connections or serves _____ or
more persons _____or more days each year -- Answer ✔✔ 15; 25; 60
13) Where are the sampling points located for required sampling of coliform bacteria in
a community water system -- Answer ✔✔ at consumers' faucets
14) The two most important factors impacting the effectiveness of chlorination are --
Answer ✔✔ concentration of chlorine and contact time
15) The treatment process that controls corrosion or scaling is known as -- Answer ✔✔
Stabilization
WITH CORRECT ANSWERS
1) What US agency establishes drinking water standards -- Answer ✔✔ USEPA
2) What disease is capable of being transmitted by water -- Answer ✔✔ typhoid
3) When any piece of electrical equipment is being worked on, the circuit breaker
should be -- Answer ✔✔ de-energized and locked out
4) In ammonia vapor is passed over a chlorine leak in a cylinder valve, the presence of
the leak is indicated by a -- Answer ✔✔ white cloud
5) What directly impacts the treatment of drinking water -- Answer ✔✔ Safe Drinking
Water Act
6) corrosive water acting on a customer's plumbing may cause what metals to enter
their drinking water -- Answer ✔✔ lead
7) What is the most common water complaint -- Answer ✔✔ objectionable taste
and/or odor
, 8) According to the Surface Water Treatment Rule, water systems serving a population
greater than 500 persons must sample the filtered water for turbidity every --
Answer ✔✔ 4 hours
9) For surface water systems without filtration, the Surface Water Treatment Rule
requires public water systems to -- Answer ✔✔ maintain a CxT value above the
minimum value
10) Surface water systems must treat, at a minimum, for -- Answer ✔✔ coliform
bacteria and turbidity
11) If a water sample tests positive for coliforms, the system must collect a set of repeat
samples within -- Answer ✔✔ 24 hours
12) A public water system has at least _____ service connections or serves _____ or
more persons _____or more days each year -- Answer ✔✔ 15; 25; 60
13) Where are the sampling points located for required sampling of coliform bacteria in
a community water system -- Answer ✔✔ at consumers' faucets
14) The two most important factors impacting the effectiveness of chlorination are --
Answer ✔✔ concentration of chlorine and contact time
15) The treatment process that controls corrosion or scaling is known as -- Answer ✔✔
Stabilization
