Electrical Machines Oil is provided in an oil filled transformer for both cooling and insulation. cooling. insulating. lubrication. both cooling and insulation. cooling. insulating. lubrication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is 1.9 Ω 2.2 Ω 5.7 Ω 6 Ω 1.9 Ω 2.2 Ω 5.7 Ω 6 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. differential compounded. over compounded. shunt. under-compounded. differential compounded. over compounded. shunt. under-compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is None of above. Proportional to the armature current. Proportional to the square of armature current. Inversely proportional to the armature current. None of above. Proportional to the armature current. Proportional to the square of armature current. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following pairs is/are correct? semi closed slot-----leakage flux is moderate All of these open slot----- leakage flux is less closed slot----- leakage flux is high semi closed slot-----leakage flux is moderate All of these open slot----- leakage flux is less closed slot----- leakage flux is high ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The function of field regulator in a DC compound motor is to limit the armature current. none of above. vary the armature resistance. control field current. limit the armature current. none of above. vary the armature resistance. control field current. ANSWER DOWNLOAD EXAMIANS APP
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