Hopkinson's test on D.C. machines is conducted at full-load.
Answer : Short circuit test on transformers is conducted to determine copper losses.
Description : An open-circuit test on a transformer is conducted primarily to measure?
Answer : The open-circuit test in a transformer is used to measure
Description : Sumpner's test is conducted on transformer to determine?
Answer : Sumpner's test is conducted on transformer to determine temprature.
Answer : The purpose of retardation test on D.C. shunt machines is to find out stray losses.
Description : In dc machines, the armature windings are placed on the rotor because of the necessity for (1) electromechanical energy conversion (2) generation of voltage (3) commutation (4) development of torque
Answer : 3 Commutation