Portion of the installed reserve kept
in operable condition but not placed in service to supply the peak load is
known as ________.
operating reserve
spinning reserve
cold reserve
cold reserve
cold reserve
●The
generating capacity available to the system within short duration of time to
meet the demand when a generator goes down is known as operating reserve.
●The
generation capacity that is on line but overloaded and that can respond within 
minutes to compensate for generation is known as spinning
reserve.
●Portion
of the installed reserve kept in operable condition but not placed in service
to supply the load is known as cold reserve.
●The
reserved capacity which can be made available quickly is known as hot reserve.
Hence,
the correct option is (C).
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