Electrical Machines What is the highest possible speed of turbo alternators? 1500 rpm 1000 rpm 4000 rpm 3000 rpm 1500 rpm 1000 rpm 4000 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is more than that of primary. Number of secondary turns is less than primary turns. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is more than that of primary. Number of secondary turns is less than primary turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Copper brushes in DC machine are used None of these where high voltage and low current. where low voltage and high currents are involved. in both of above cases. None of these where high voltage and low current. where low voltage and high currents are involved. in both of above cases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be 25.564 Ω. 2.74 Ω. 2.781 Ω. 2.241 Ω. 25.564 Ω. 2.74 Ω. 2.781 Ω. 2.241 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has more stability None of these cylindrical motor both motors has same stability salient pole motor None of these cylindrical motor both motors has same stability salient pole motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause double frequency currents in the rotor. All of these heating of rotor. vibrations. double frequency currents in the rotor. All of these heating of rotor. vibrations. ANSWER DOWNLOAD EXAMIANS APP
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