Q.1
Alternating current is measured by
Q.2
A universal RLC bridge uses
Q.3
In a D.C. machine, the value of peripheral speed should not, normally, exceed
Q.4
In a D.C. machine the current per brush arm should not be more than
Q.5
Direct water cooling of rotor winding presents
Q.6
Aluminium when adopted as a conductor material in ______ transformers, decreases the overall cost of the transformer
Q.7
For measuring a very high resistance we should use
Q.8
Commonly used instruments in power system measurement are
Q.9
In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill.
Q.10
________ has a lowrelative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable.
Q.11
A power factor meter has
Q.12
Is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another,
Q.13
A moving-coil permanent-magnet instrument can be used as _____ by using a low resistance shunt.
Q.14
Damping of the Ballistic galvanometer is made small to
Q.15
Materials exhibiting zero value of resistivity are known as ______ .
Q.16
The power factor of a single phase load can be calculated if the instruments available are
Q.17
The adjustment of position of shading bands, in an energy meter is done to provide
Q.18
According to application, instruments are classified as
Q.19
Commonly used standard capacitor is
Q.20
Is universally used for windings of electrical machines because it is easily workable without any possibility of
Q.21
The power of a n-phase circuit can be measured by using a minimum of
Q.22
________ is the common method of applying brushes to the commntator.
Q.23
are always double layer type.
Q.24
Volt box is a component to
Q.25
For measuring current at high frequency we should use
Q.26
The high voltage winding is usually which of the following type ?
Q.27
The change in flux linkages can be caused in which of the following ways ?
Q.28
Disc windings are primarily used in
Q.29
Resistances can be measured with the help of
Q.30
A multirangq instrument has
0 h : 0 m : 1 s