Class C Water License Exam – Complete
Questions with Verified A+ Answers.
1. Liquified chlorine gas will expand ____ times its original volume. -
Answer>>>: 460
2. Chlorine gas is ____ times heavier than breathing air. - Answer>>>:
2.5
3. Chlorine gas is considered to be ____% pure. - Answer>>>: 100
4. Bleach is approximately _____% pure. - Answer>>>: 5.25
5. HTH dry powder chlorine is set at ____% purity. - Answer>>>: 65
6. A commonly used method to test for chlorine residual in water is called the
____ method. - Answer>>>: dpd
7. When chlorine gas is added to water, the pH goes down due to the two _____
that form. - Answer>>>: acids
8. Water with a pH of 7.9 is considered to be ______ or _____. - Answer>>>:
basic, alkaline
9. A 5' deep pipe trench requires exit ladders every ____ feet and it needs to
have approved ____. - Answer>>>: 25. shoring
Page 1 of 13
, Class C Water License Exam – Complete
Questions with Verified A+ Answers.
10.When turning a centrifugal pump off, "this" must be done to prevent water
hammer. - Answer>>>: close the discharge valve
11.When an operator isolates a motor from an operable system for repair, it is
vital that he/she follow a _____/_____ procedure. - Answer>>>:
lockout/tagout
12.Horsepower is defined as _____ft-lbs per minute or 746 watts. - Answer>>>:
33,000
13.The rated flow of a water meter, as stated by the manufacturer, is based
upon ______ flow. - Answer>>>: continuous
14.What is the minimum setback distance for fire hydrants to avoid large vehicle
overhang? - Answer>>>: 2ft
15.What is the primary reason for using dry barrel fire hydrants? - Answer>>>:
to keep it from freezing
16.You must coordinate a plan for shutdown of a water storage facility so that
the distribution system will still be able to _____ upon and after the
shutdown. - Answer>>>: meet the customers demands
17.What are the three main components of a centrifugal pump? - Answer>>>:
impeller, case and shaft
Page 2 of 13
Questions with Verified A+ Answers.
1. Liquified chlorine gas will expand ____ times its original volume. -
Answer>>>: 460
2. Chlorine gas is ____ times heavier than breathing air. - Answer>>>:
2.5
3. Chlorine gas is considered to be ____% pure. - Answer>>>: 100
4. Bleach is approximately _____% pure. - Answer>>>: 5.25
5. HTH dry powder chlorine is set at ____% purity. - Answer>>>: 65
6. A commonly used method to test for chlorine residual in water is called the
____ method. - Answer>>>: dpd
7. When chlorine gas is added to water, the pH goes down due to the two _____
that form. - Answer>>>: acids
8. Water with a pH of 7.9 is considered to be ______ or _____. - Answer>>>:
basic, alkaline
9. A 5' deep pipe trench requires exit ladders every ____ feet and it needs to
have approved ____. - Answer>>>: 25. shoring
Page 1 of 13
, Class C Water License Exam – Complete
Questions with Verified A+ Answers.
10.When turning a centrifugal pump off, "this" must be done to prevent water
hammer. - Answer>>>: close the discharge valve
11.When an operator isolates a motor from an operable system for repair, it is
vital that he/she follow a _____/_____ procedure. - Answer>>>:
lockout/tagout
12.Horsepower is defined as _____ft-lbs per minute or 746 watts. - Answer>>>:
33,000
13.The rated flow of a water meter, as stated by the manufacturer, is based
upon ______ flow. - Answer>>>: continuous
14.What is the minimum setback distance for fire hydrants to avoid large vehicle
overhang? - Answer>>>: 2ft
15.What is the primary reason for using dry barrel fire hydrants? - Answer>>>:
to keep it from freezing
16.You must coordinate a plan for shutdown of a water storage facility so that
the distribution system will still be able to _____ upon and after the
shutdown. - Answer>>>: meet the customers demands
17.What are the three main components of a centrifugal pump? - Answer>>>:
impeller, case and shaft
Page 2 of 13
