California Custodian Certification Exam COMPLETE
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Of the following, the best type of AC motor to use for direct
connection to a timing device which must be very accurate
is a... - Answer-Synchronous motor
One ton of refrigeration may be expressed most
accurately as... - Answer-200 BTU per minute
Which of the following statements is correct with respect to
filtration plants of swimming pools... - Answer-Alum is
added to water to form a flee before the water reaches the
filters
An electric elevator car stalls on the ground floor of a
school building. Of the following the item you would least
likely to check in your inspection is the B) Floor door
switch C) Limit switch D) current to elevator motor -
Answer-Limit switch (only active when is running)
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An examination of the water supply of the sinks of
demonstration tables in science rooms reveals the use of
rubber hose attachments to sink taps extending below the
sink rim. The most criticism of this practice is that ... -
Answer-A submerged inlet condition may be created
resulting in back siphonage
The modern multiple circuit program instrument which
automatically controls bell signals in a school usually
includes... - Answer-Automatic resetting of electric clocks
throughout the school
A solenoid valve is actuated by... - Answer-Electric current
A sequential draft control on a rotary cup oil fired boiler
should operate to ... - Answer-Close the automatic damper
after the burner goes off and the burner cycle is completed
The one component of flue gas that indicates, when
present, that more excess air is being supplied than is
being used is... - Answer-Oxygen
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Advantage of a float thermostatic steam trap over a float
type type steam trap - Answer-Allows non condensable
gases to escape
Instrument to use to measure over the fire draft is... -
Answer-Inclined manometer
In high pressure electric generating plants in large
buildings, heating the feed water from 70f to 180f with
exhaust steam usually will decrease the fuel consumption
by... - Answer-10%
The direct room radiator with a pneumatically controlled
steam heating system is cold, while the adjoining rooms
are heated adequately. The first thing you would check in
the room is... - Answer-Steam pipe in the room before the
pneumatic steam valve
The usual vacuum gauge on a steam heating system
reads in... - Answer-Inches of vacuum
In a mechanical pressure type burner using no 6 oil
heated to 230 f by steam, the oil is atomized by... -
Answer-Oil pressure