Power Systems To protect the power transformer ( Y-Y with neutral grounded) against fault, which type of connection do the current transformers have? Δ-Δ connection Y-Y connection Δ-Y connection Y-Δ connection Δ-Δ connection Y-Y connection Δ-Y connection Y-Δ connection ANSWER DOWNLOAD EXAMIANS APP
Power Systems A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is 4 20 8 10 4 20 8 10 ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a steam power plant, the feed water coming to the economizer is heated plant the feed water coming to the economizer is heated using LP steam. HP steam. flue gas. direct heat in the furnace. LP steam. HP steam. flue gas. direct heat in the furnace. ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 7.25 pu 2.5 pu 4.28 pu 3.75 pu 7.25 pu 2.5 pu 4.28 pu 3.75 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Proximity effect depends on All of these distance between the conductors frequency relative permeability All of these distance between the conductors frequency relative permeability ANSWER DOWNLOAD EXAMIANS APP
Power Systems The load duration curve for a system is 8 hours 30 MW, 16 hours 25 MW and 24 hours 20 MW. The load factor will be 0.44. 0.25. 1.3. 0.83. 0.44. 0.25. 1.3. 0.83. ANSWER DOWNLOAD EXAMIANS APP
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