30. A 480/240 Volt, Step-down transformer with a primary current
of 200 amperes will have an...
30. A 480/240 Volt, Step-down transformer with a primary current
of 200 amperes will have an approximate secondary current of ______
amperes.
A. 100
B. 200
C. 300
D. 400
31. The inverter output of a stand-alone photovoltaic system
shall be permitted to supply 120 volts to a single-phase, 3-wire
120/240 volt service where there are no _____ on the system.
A. Motors connected
B. Transformers connected
C. Multi-wire branch circuits
D. Appliance branch circuits
32. When a combination transformer...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the
following parameters: Rp= 3.0 Ω,...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the
following parameters: Rp= 3.0 Ω, Xp= 4.0 Ω, Rs= 2.5 Ω, Xs= 2.0 Ω,
Rc= 60 KΩ, and Xm = 15 KΩ. The transformer is operating at full
load with a power factor of 0.707 lagging. The magnetizing branch
impedance can be ignored.
a) Draw the transformer’s equivalent T-circuit,
b) Find the equivalent winding impedance referred to the high
side,
c) Calculate the primary and secondary currents,
d) Determine...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the
following parameters: Rp= 3.0 Ω,...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the
following parameters: Rp= 3.0 Ω, Xp= 4.0 Ω, Rs= 2.5 Ω, Xs= 2.0 Ω,
Rc= 60 KΩ, and Xm = 15 KΩ. The transformer is operating at full
load with a power factor of 0.707 lagging. The magnetizing branch
impedance can be ignored.
a) Draw the transformer’s equivalent T-circuit,
b) Find the equivalent winding impedance referred to the high
side,
c) Calculate the primary and secondary currents,
d) Determine...
Demand Curve: (100,50), (150, 40), (200, 30), (250, 20),
(300,10)
Supply Curve: (50,20), (100, 30), (150,...
Demand Curve: (100,50), (150, 40), (200, 30), (250, 20),
(300,10)
Supply Curve: (50,20), (100, 30), (150, 40), (200, 50), (250,
60), (300, 70)
18. What is the quantity bought and sold in the market if the
government implements a subsidy of $40/unit?
a) 100 b) 150 c) 200 d) 250
For questions 19 and 20, please use the following information
for the demand curve and supply curve:
QD =1000–2P QS =-200+P
19. What is the quantity bought and sold if...
Project A has a $500 investment and cash inflows of $200, $250
and $300 in years...
Project A has a $500 investment and cash inflows of $200, $250
and $300 in years 1-3. Project B has a $400 investment and cash
inflows of $300, $100 and $200 in years 1-3. Given this
information, calculate its cross-over IRR.
a. 12.46%
b. 11.46%
c. 14.46%
d. 13.46%
e. 10.46%
Plate values of a three-phase transformer are given
below:
1600 kVA, 15 kV / 400 V,...
Plate values of a three-phase transformer are given
below:
1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses
2450 W, rated
copper losses of power 14500 W; Dy5.
a) Calculate primary and secondary line and phase currents.
b) Secondary at 75% load in power factor with 0.85 inductance and
0.85 capacity
calculate the voltage separately. Compare and interpret the
results. capacity
at what time of day can the upload be seen? To...