Portion of the installed reserve kept
in operable condition but not placed in service to supply the peak load is
known as ________.
Capacity of hydroelectric plant in
service in excess of the peak load is known as ________ .
The ratio of average generation in kWH
per year to the product of installed capacity in kW and hrs per year is known
as ________.
A. plant factor
B. capacity factor
C. use factor
A plot between power generated in MW
and time is known as ________ .
In optical pyrometers, absorption
filter is used ________ .
The same volume of all gases would
represent their ________ .
The escape velocity of a body on earth
________ .
The recovery voltage will be maximum
for power factor of
For
cooling of large size generators hydrogen is used because
A 4-pole generator with 16 coils has a
two layer lap winding. The pole pitch is
A centre zero ammeter connected in the
rotor circuit of a 6-pole, 50 Hz induction motor makes 30 oscillations in one
minute. The rotor speed is
The negative phase sequence in a
3-phase synchronous motor exists when the motor is
Starting torque of synchronous motor
is
A salient pole synchronous generator
connected to an infinite bus will deliver maximum power at
The angle between induced emf and
terminal voltage on no-load for a single phase alternator is
The principle of dynamically induced
emf is utilised in a
The permissible variation of frequency
in power system PS is
High leakage transformers are of
Which of the following will improve
the mutual coupling between primary and secondary circuit?
The efficiency at a 100 KVA
transformer is 0.98 at full as well as half load. For this transformer at full
load the copper loss
The power factor at which transformer operates
If a 500 kVA. 200 Hz transformer is
operated at 50 Hz its KVA rating will be
The voltage across the various elements are, marked as shown in the figure below. The input voltage is
The current read by the ammeter A in the AC circuit shown in following is
Superposition theorem is essentially
based on the concept of
Specific resistance of a conductor
depends upon
The curve representing Ohm’s law is
In the figure shown below, if we
connect a source of 2V, with internal resistance of
at AA with positive terminal
at A, then current through R is
The value of current I flowing in the 1
resistor in the
circuit shown in the figure below will be
The power factor will be leading in
case of
The connected load of a consumer is 2
kW and his maximum demand is 1.5 kW. The demand factor of consumer is
An air blast circuit breaker is
usually employed for
Reactance relays are employed for phase fault in
By burden of relay we mean
The rating of fuse is expressed in
terms of
Earth fault relays are
The material commonly used for sheaths
of underground cable is
To meet the reactive power
requirements at load centres usually
The ratio of line-to-line capacitance
and line-to-neutral capacitance is
A current i = (10 + 10sin t) amperes is passed
through moving iron type ammeter. Its reading will be
Motor used for elevators is generally
A series resonant circuit implies
Arc lamp operates at
The efficiency for maximum power transfer to the
load is
Two coupled coils with L1 = L2 = 0.6H have a coupling coefficient of K = 0.8. The turn ratio 
is
Two heaters rated at 1000 W, 250 V
each are connected in series across a 250 V, 50 Hz AC mains. The total power
drawn from the supply would be
The value of V in the circuit shown in the given figure is
A circuit component that opposes the change in
circuit voltage is
The rotor input when, rotor copper
loss in an induction motor is 600 W and slip is 3% is
High speed alternators usually have