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