Electrical Machines In one 132 / 33 kV transformer the LV resistance is 0.02 per unit. The resistance referred to HV side is 0.16 pu. 0.02 pu. 0.01 pu. 0.08 pu. 0.16 pu. 0.02 pu. 0.01 pu. 0.08 pu. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tap changer is generally provided in voltage transformer. current transformer. earthing transformer. power transformer. voltage transformer. current transformer. earthing transformer. power transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is magnetizing. ineffective. cross – magnetizing. demagnetizing. magnetizing. ineffective. cross – magnetizing. demagnetizing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will both decrease both increase decrease and increase respectively increase and decrease respectively both decrease both increase decrease and increase respectively increase and decrease respectively ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying number of poles. Both (A) and (B). By varying supply voltage. By varying the supply frequency. By varying number of poles. Both (A) and (B). By varying supply voltage. By varying the supply frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. The highest speed of the alternators is 3600 rpm. 500 rpm. 3000 rpm. 600 rpm. 3600 rpm. 500 rpm. 3000 rpm. 600 rpm. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS