Electrical Machines DC machine is a none of above are correct. both are correct. conduction machine. convection machine. none of above are correct. both are correct. conduction machine. convection machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the cause of rapid brush wear may be severe sparking. any of above. rough commutator surface. imperfect contact. severe sparking. any of above. rough commutator surface. imperfect contact. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machine is invariably provided with forced ventilation? 50 MW generator in a power plant. Fractional horse power high speed motor. Hermetically sealed motor of refrigerator. Fractional horse power slow speed motor. 50 MW generator in a power plant. Fractional horse power high speed motor. Hermetically sealed motor of refrigerator. Fractional horse power slow speed motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Magnetic field of a DC generator is produced by what? Both B and C. Electromagnets. Permanent magnets. None of the options. Both B and C. Electromagnets. Permanent magnets. None of the options. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have more starting time. more starting torque. reduced starting current. smoother acceleration. more starting time. more starting torque. reduced starting current. smoother acceleration. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are 1 , 3, 5 1, 4,5 2, 4, 5 2, 3, 5 1 , 3, 5 1, 4,5 2, 4, 5 2, 3, 5 ANSWER DOWNLOAD EXAMIANS APP
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