1141. In a transformer supplying inductive load :

A. The secondary current results in equivalent primary current in phase opposition
B. The secondary terminal voltage is less than the secondary induced emf
C. The power factor on primary side will be lower than that of load
D. All of the above *

1142. The phasor diagram of a transformer on load can be drawn only if we know :

A. Equivalent circuit parameters of the transformer
B. Load current
C. Load pf
D. All of the above *

1143. When a transformer is operating on no load the primary applied voltage is approximately balanced by :

A. Primary induced emf *
B. Secondary induced emf
C. Terminal voltage across the secondary
D. Voltage drop across the resistance and reactance

1144. In the transformer circuit mode, the core loss is represented as a :

A. Series resistance
B. Series inductance
C. Shunt resistance *
D. Shunt inductance

1145. Full load voltage regulation of power transformer is zero when power factor of the load is near :

A. Unity and leading *
B. Zero and leading
C. Zero and lagging
D. Unity and lagging

1146. In a transformer ,zero voltage regulation at full load is :

A. Not possible
B. Possible at unity power factor load
C. Possible at leading power factor load *
D. None of them

1147. Positive voltage regulation is an indication of _________load :

A. Inductive
B. Capacitive
C. Either inductive or capacitive *
D. None of them

1148. In a power transformer iron losses remains practically constant from no load to full load this is because :

A. Core flux remains constant *
B. Leakage flux remains constant
C. Both A and B
D. None of them

1149. In a power transformer, If in place of sinusoidal wave,a peaked wave voltage is fed to the primary :

A. Copper losses will be less
B. Noise level will be reduced
C. Iron losses will be more
D. Iron losses will be less *

1150. In a 3-phase , 5KV, 5MVA system , What is the base impedance ?

A. 5 ohms *
B. 50 ohms
C. 500 ohms
D. 5000 ohms