Electrical Machines What are slot wedges in a DC machine made of? Mild steel. Cast iron. Silicon steel. Fibre. Mild steel. Cast iron. Silicon steel. Fibre. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements about commutating poles which are fitted on most large dc Shunt motors: 1. The commutating poles are placed in the geometric neutral plane and their number is usually Equal to the number of main poles 2. The winding on the commutating poles is connected in series with the shunt-field winding on the main poles 3. The polarity of the commutating pole must be that of the next pole further ahead 4. The commutating poles neutralize the reactance voltage produced in the coil undergoing Commutation. Of these statements, 1, 2 and 4 are correct 1, 2 and 3 are correct 1 and 4 are correct 2, 3 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 1 and 4 are correct 2, 3 and 4 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type short - shunt generator. series generator. shunt generator. level compound. short - shunt generator. series generator. shunt generator. level compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be steady and unidirectional None of these oscillating pulsating and unidirectional steady and unidirectional None of these oscillating pulsating and unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 3600 rpm. 4000 rpm. 1500 rpm. 3000 rpm. 3600 rpm. 4000 rpm. 1500 rpm. 3000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 4. 2. 8. 1. 4. 2. 8. 1. ANSWER DOWNLOAD EXAMIANS APP
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