Quiz 4 EM-1

Which test is also called as back to back test?

• Retardation test

• Sumpner’s test

• Field test

• Voltage drop test

While conducting the sumpner’s test, the primaries of the two identical transformers are connected in parallel across the supply. The secondary’s are connected in

• Parallel

• Series opposition

• Both in series and parallel

• Not connected at all

Sumpner’s test is performed on _________

• Single transformer at a time

• Only two transformers at a time

• Minimum 2 transformers at a time

• Many transformers at a time

Which of the following tests are enough to find all the parameters related to a transformer?

• OC test

• OC, SC test

• OC, SC, Sumpner’s test

• Sumpner’s test

To conduct the open circuit test, test is conducted on the _____________

• l.v. side

• h.v. side

• primary

• secondary

Which of the following mentioned losses occur in a transformer?

• Hysteresis losses; Eddy current losses; Dielectric losses; Stray load losses

• Hysteresis losses; Eddy current losses;

• Dielectric losses; Stray load losses

• Hysteresis losses; Eddy current losses; Stray load losse

Short circuit test on transformers is conducted to determine ______

• Core losses

• Copper losses

• Hysteresis losses

• Eddy current losses

Open circuit test on transformers is conducted so as to get ______________

• Hysteresis losses

• Copper losses

• Core losses

• Eddy current losses

During open circuit test (OC) of a transformer _____________

• primary is supplied rated kVA

• primary is supplied full-load current

• primary is supplied current at reduced voltage

• primary is supplied rated voltage

The total core loss can be termed as ____________

• Eddy current loss

• Hysteresis loss

• Copper loss

• Magnetic loss