"C" Water Operator - 600 Study
Questions with verified answers
What is an Ampere? - ** VERIFIED ANSWERS **✔✔a unit of measurement for current
Which of the following is a type of pump that is commonly used in a water treatment plant?
- ** VERIFIED ANSWERS **✔✔Centrifugal
What is a multi-staged pump? - ** VERIFIED ANSWERS **✔✔has more than one impeller
if the pump impeller is running backwards, what action must be taken to correct the
rotation? - ** VERIFIED ANSWERS **✔✔switch any two electrical leads
When should the packing of a pump be adjusted? - ** VERIFIED ANSWERS **✔✔when the
pump is running
when a pump fails to deliver at its rated capacity, what is most likely the cause? - **
VERIFIED ANSWERS **✔✔air leak
what is a common cause for vibrations in a motor? - ** VERIFIED ANSWERS
**✔✔misalignment of the couplings
What is the purpose of the wear rings in a pump? - ** VERIFIED ANSWERS **✔✔Plug
internal leakage
what should the seal water pressure be for a pump? - ** VERIFIED ANSWERS **✔✔5 psi
higher than the pumps discharge pressure
,what is the purpose of the seal water? - ** VERIFIED ANSWERS **✔✔block out air intake
and lubricate the packing
what is the recommended maximum suction lift? - ** VERIFIED ANSWERS **✔✔15 ft.
In a water treatment plant, what type of pump is commonly used to deliver chemical
solutions? - ** VERIFIED ANSWERS **✔✔Positive displacement
when should you lubricate your equipment? - ** VERIFIED ANSWERS **✔✔follow the
manufacturer's recommendations
In what manner is packing installed? - ** VERIFIED ANSWERS **✔✔a strip at a time and
staggered
a positive displacement pump should never be operated________? - ** VERIFIED
ANSWERS **✔✔against a closed discharge valve
if two of more pumps of the same size and purpose are online, what method of operation is
recommended for them? - ** VERIFIED ANSWERS **✔✔alternate to equalize wear
If half of the mechanical seal fails, what corrective action should be taken? - ** VERIFIED
ANSWERS **✔✔change both halves of the seal
what is the purpose of a lantern ring? - ** VERIFIED ANSWERS **✔✔water seal
The packing of a pump should be adjusted to _________? - ** VERIFIED ANSWERS
**✔✔allow a slight operating leakage and allow approximately a drip per second.
On a multiple drive motor, when a belt fails, what corrective action should be taken? - **
VERIFIED ANSWERS **✔✔Replace all the belts on the drive
,To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. -
** VERIFIED ANSWERS **✔✔foot valve
If a motor fails to start, what should be checked first? - ** VERIFIED ANSWERS
**✔✔Power supply
Opening or closing a valve rapidly will cause? - ** VERIFIED ANSWERS **✔✔water
hammer
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? -
** VERIFIED ANSWERS **✔✔cavitaion
Changing the packing on a pump is called ________ maintenance - ** VERIFIED
ANSWERS **✔✔corrective
what is an example of a daily maintenance task for a compressor? - ** VERIFIED ANSWERS
**✔✔drain the air receiver
what type of valve is usually used to control the rate of flow? - ** VERIFIED ANSWERS
**✔✔globe valve
what type of valve is buried? - ** VERIFIED ANSWERS **✔✔non-rising stem
what is the most common valve type used in a water treatment plant? - ** VERIFIED
ANSWERS **✔✔gate valve
what will happen if the gate valve is left half open to control flow? - ** VERIFIED
ANSWERS **✔✔Undue seat wear
, In what manner should carbon be stored? - ** VERIFIED ANSWERS **✔✔on concrete floor
in single rows
what is brinelling? - ** VERIFIED ANSWERS **✔✔a type of bearing wear
what is the recommended manner for storing potassium permanganate? - ** VERIFIED
ANSWERS **✔✔on a concrete floor away from heat or heated pipes
what causes more damage to a pump's impeller? - ** VERIFIED ANSWERS **✔✔Air
What is the unit of electrical resistance? - ** VERIFIED ANSWERS **✔✔Ohm
What is an ammeter - ** VERIFIED ANSWERS **✔✔measures amps and current
what type of electrical service is usually found in water plants? - ** VERIFIED ANSWERS
**✔✔three phase
Generally, all motors over over two HP require what type of electrical service? - **
VERIFIED ANSWERS **✔✔3 phase
Before starting work on any electrical equipment, you must first ____? - ** VERIFIED
ANSWERS **✔✔Lock out tag out
What unit is used to measure the rate of power Consumption? - ** VERIFIED ANSWERS
**✔✔Kilowatts
What is the function of a shear pin? - ** VERIFIED ANSWERS **✔✔to prevent damage to
equipment when there is an overload
Questions with verified answers
What is an Ampere? - ** VERIFIED ANSWERS **✔✔a unit of measurement for current
Which of the following is a type of pump that is commonly used in a water treatment plant?
- ** VERIFIED ANSWERS **✔✔Centrifugal
What is a multi-staged pump? - ** VERIFIED ANSWERS **✔✔has more than one impeller
if the pump impeller is running backwards, what action must be taken to correct the
rotation? - ** VERIFIED ANSWERS **✔✔switch any two electrical leads
When should the packing of a pump be adjusted? - ** VERIFIED ANSWERS **✔✔when the
pump is running
when a pump fails to deliver at its rated capacity, what is most likely the cause? - **
VERIFIED ANSWERS **✔✔air leak
what is a common cause for vibrations in a motor? - ** VERIFIED ANSWERS
**✔✔misalignment of the couplings
What is the purpose of the wear rings in a pump? - ** VERIFIED ANSWERS **✔✔Plug
internal leakage
what should the seal water pressure be for a pump? - ** VERIFIED ANSWERS **✔✔5 psi
higher than the pumps discharge pressure
,what is the purpose of the seal water? - ** VERIFIED ANSWERS **✔✔block out air intake
and lubricate the packing
what is the recommended maximum suction lift? - ** VERIFIED ANSWERS **✔✔15 ft.
In a water treatment plant, what type of pump is commonly used to deliver chemical
solutions? - ** VERIFIED ANSWERS **✔✔Positive displacement
when should you lubricate your equipment? - ** VERIFIED ANSWERS **✔✔follow the
manufacturer's recommendations
In what manner is packing installed? - ** VERIFIED ANSWERS **✔✔a strip at a time and
staggered
a positive displacement pump should never be operated________? - ** VERIFIED
ANSWERS **✔✔against a closed discharge valve
if two of more pumps of the same size and purpose are online, what method of operation is
recommended for them? - ** VERIFIED ANSWERS **✔✔alternate to equalize wear
If half of the mechanical seal fails, what corrective action should be taken? - ** VERIFIED
ANSWERS **✔✔change both halves of the seal
what is the purpose of a lantern ring? - ** VERIFIED ANSWERS **✔✔water seal
The packing of a pump should be adjusted to _________? - ** VERIFIED ANSWERS
**✔✔allow a slight operating leakage and allow approximately a drip per second.
On a multiple drive motor, when a belt fails, what corrective action should be taken? - **
VERIFIED ANSWERS **✔✔Replace all the belts on the drive
,To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. -
** VERIFIED ANSWERS **✔✔foot valve
If a motor fails to start, what should be checked first? - ** VERIFIED ANSWERS
**✔✔Power supply
Opening or closing a valve rapidly will cause? - ** VERIFIED ANSWERS **✔✔water
hammer
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? -
** VERIFIED ANSWERS **✔✔cavitaion
Changing the packing on a pump is called ________ maintenance - ** VERIFIED
ANSWERS **✔✔corrective
what is an example of a daily maintenance task for a compressor? - ** VERIFIED ANSWERS
**✔✔drain the air receiver
what type of valve is usually used to control the rate of flow? - ** VERIFIED ANSWERS
**✔✔globe valve
what type of valve is buried? - ** VERIFIED ANSWERS **✔✔non-rising stem
what is the most common valve type used in a water treatment plant? - ** VERIFIED
ANSWERS **✔✔gate valve
what will happen if the gate valve is left half open to control flow? - ** VERIFIED
ANSWERS **✔✔Undue seat wear
, In what manner should carbon be stored? - ** VERIFIED ANSWERS **✔✔on concrete floor
in single rows
what is brinelling? - ** VERIFIED ANSWERS **✔✔a type of bearing wear
what is the recommended manner for storing potassium permanganate? - ** VERIFIED
ANSWERS **✔✔on a concrete floor away from heat or heated pipes
what causes more damage to a pump's impeller? - ** VERIFIED ANSWERS **✔✔Air
What is the unit of electrical resistance? - ** VERIFIED ANSWERS **✔✔Ohm
What is an ammeter - ** VERIFIED ANSWERS **✔✔measures amps and current
what type of electrical service is usually found in water plants? - ** VERIFIED ANSWERS
**✔✔three phase
Generally, all motors over over two HP require what type of electrical service? - **
VERIFIED ANSWERS **✔✔3 phase
Before starting work on any electrical equipment, you must first ____? - ** VERIFIED
ANSWERS **✔✔Lock out tag out
What unit is used to measure the rate of power Consumption? - ** VERIFIED ANSWERS
**✔✔Kilowatts
What is the function of a shear pin? - ** VERIFIED ANSWERS **✔✔to prevent damage to
equipment when there is an overload
