While conducting the sumpner’s test, the primaries of the two identi – McqOptions

MCQOPTIONS

1.	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
A.	Parallel
B.	Series opposition
C.	Both in series and parallel
D.	Not connected at all
Answer» C. Both in series and parallel

Discussion

No Comment Found

Related MCQs

Which starter does not provide high speed protection to the d.c. shunt motor?
Which type of rotor is generally used for high speed alternators or turbo alternators?
While carrying out brake tests if the belt snaps, then the motor will
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
While connecting three phase transformer in star-star connection, the terminals of secondaries are wrongly joined. Then the mutual phase angle and magnitude of line to line voltages of secondaries will
While delivering an useful power of 20 kW to the full load, a 3 phase, 50 Hz, 6 pole induction motor draws a line current of 50 A. it is connected to supply of 420 V and runs at a speed of 950 rpm. If mechanical losses are 1000 W, then its rotor copper losses and shaft torque are
While drawing the graph of no load losses versus voltage, the voltage is extrapolated to V = 0. The extrapolated region shows
While performing retardation tests, the machine whose test is to be taken is run at a speed which is
While performing Swinburne’s test, the iron losses are assumed to be
While performing sumpner’s test on transformer, if the secondary are not in series opposition then the meter will read