NEW
Font size
WorksheetsMI -1
Total questions: 15
Worksheet time: 15mins
Which is not correct in adjustment of energy meter
Creep
Power
main speed
Friction
Which is not the Operating mechanism of Energy meter
Driving
Moving
Controlling
Braking
Torque equation of Energy meter
Td α V1I cos φ
Td α VI2 cos φ
Td α VI cos φ
Td α VI1 cos φ
Which of the following are integrating instruments?
Ammeters.
Wattmeters.
Voltmeters.
Ampere hour and watt hour meters.
An analog ammeter is
a controlling instrument.
an absolute instrument.
an indicating instrument.
a recording instrument.
Which of following are needed both for protection and metering?
Energy meter.
Wattmeters.
Instrument transformer.
Power factor meters.
Torque equation of Moving Iron instruments
θ α I 2
θ α I
θ α V 2
θ α V
Which is not the types of Energy Meter
Single element
two element
three element
four element
Unit of electrical energy
KW
KWh
KVA
KVAh
Energy meter consists of how many electromagnets
one
two
three
four
Energy meter disc is made of
Brass
Steel
aluminum
Silver
Braking torque is directly proportional to
Current
Voltage
Speed
Power
To avoid creep error
Two holes are drilled 180 degree opposite to each other in disc
Two holes are drilled 90 degree to each other in disc
Two holes are drilled 150 degree to each other in disc
Two holes are drilled 60 degree to each other in disc
Energy meter is used for
None
Both AC and DC
DC
AC
COS (180 - θ ) =
COS θ
-1
1
- COS θ
