For a 7.46 kW, 200 V dc shunt motor with full load efficiency of 85% – McqOptions

MCQOPTIONS

1.	For a 7.46 kW, 200 V dc shunt motor with full load efficiency of 85% has armature resistance of 0.25 ohms. Calculate the value of starting resistance in ohms for a current 1.5 times of the full load current.
A.	2.788
B.	3.038
C.	2.688
D.	2.588
Answer» B. 3.038

Discussion

No Comment Found

Related MCQs

Calculate the time period of the waveform v(t)=12sin(8πt+8π÷15)+144sin(2πt+π÷6)+ 445sin(πt+7π÷6).
If induction motor air gap power is 1.8 KW and gross developed power is .1 KW, then rotor ohmic loss will be KW.
A 2-pole, 3-phase, Hz induction motor is operating at a speed of 550 rpm. The frequency of the rotor current of the motor in Hz is 2.
Calculate the moment of inertia of the disc having a mass of 54 kg and diameter of 91 cm.
DC machines have windings and synchronous machines use windings.
A starter is required for a 220-V shunt motor. The maximum allowable current is 55 A and the minimum current is about 35 A. The armature resistance of the motor is 0.4 Ω. What will be the number of sections of starter resistance required?
The flux and the internally generated voltage of a dc machine is a function of its magneto-motive force.
Second lowest order harmonic present in 3-Φ fully controlled rectifier is
applications.
motor. The maximum allowable current is 55 A and the minimum current is about 35 A. The armature resistance of the motor is 0.4 Ω. What will be the number of sections of starter resistance required?