A generating station supplies peak load of 12,000 KW, 9,000 KW, and 6,000 KW. Calculate the maximum demand of the station and the energy supplies in a year if it its diversity factor and its average annual load factor is 1.2 and 0.7, respectively.
A27,000 kW, \(137.97 \times 10^{6}\) kWh
B22,500 kW, \(137.97 \times 10^{6}\) kWh
C27,000 kW, \(5.75 \times 10^{6}\) kWh
D22,500 kW, \(5.75 \times 10^{6}\) kWh
#42📜 EE Pre-Board March 2015📘 PowerhouseMedium
A diesel generator set burns fuel with a heating value of 18,000 BTU per lb. the diesel engine has an efficiency of 30% and the alternator has an efficiency of 95%. Determine the fuel cost component of producing one KWHR if the diesel costs P 2.80 per lb
AP 0.15
BP 2.15
CP 3.28
DP 1.86
#43📜 EE Pre-Board March 2015📘 PowerhouseMedium
A power plant gets water from a dam from a height of 100 m at the rate of 1,000 cubic meters per minute. If the overall efficiency of the plant is 75%, what is the KW output of the plant?
A12,250 KW
B5,250 KW
C7,550 KW
D15,250 KW
#44📜 EE Pre-Board August 2015📘 PowerhouseMedium
A customer owns an old air conditioning unit rated ½ HP at 70% efficiency but decide to buy a new one of the same horse power rating with 85% efficiency and with 2 years warranty. If the usage of new unit is 8 hours per day and 150 days per year, what is the differential cost of energy in one year when the unit cost of energy is P8.99/KWHR?
AP9,870
BP8,070
CP1,014
DP2,029
#45📜 EE Pre-Board August 2015📘 PowerhouseMedium
A certain electric generating station has an efficiency of 25%. If coal consumption is 4,500 kg/hr and calorific value of coal is 6,000kcal/kg. Find the total energy produced per day.
A753.6 MWh
B188.4 MWh
C376.8 MWh
D565.2 MWh
#46📜 EE Pre-Board August 2015📘 PowerhouseMedium
A 100 MW power station delivers 100 MW for 2 hrs, 50 MW for 8 hrs and is shut down for the rest of each day. It is also shut down for maintenance for 60 days each year. Calculate its annual load factor.
A18%
B19%
C20%
D21%
#47📜 EE Pre-Board August 2015📘 PowerhouseMedium
A diesel generator set burns fuel with a heating value of 18,000 BTU per lb. The diesel engine has an efficiency of 30% and the alternator has an efficiency of 95%. Determine the fuel cost component of producing one KWHR if the diesel cost P12.80 per lb.
AP8.51
BP7.51
CP6.51
DP5.51
#48📜 EE Pre-Board March 2016📘 PowerhouseMedium
In a certain country, the peak power demand for year 2005 is 9,287 MW and by year 2014 it is estimated to be 10,064 MW. Calculate the growth rate.
A0.9 %
B0.8%
C0.76%
D0.85%
#49📜 EE Pre-Board March 2016📘 PowerhouseMedium
A certain amount of fuel can be converted into \(3 \times 10^{-3}\) quads of energy. Assume 30% overall efficiency for the power plant. If the average load on the power plant over a 24 hr period is 60 MW, how long in days will the fuel last?
A180
B175
C183
D185
#50📜 EE Pre-Board March 2016📘 PowerhouseMedium
Natural gas has an energy content of 0.036 watt-year/ft³, and coal has an average energy content of 640 watt-years/ton. If 20 percent of the net energy requirement of \(2.82 \times 10^{6}\) GWh were to be met with gas and 80 percent with coal, what amount of gas would be required?
A\(1.79 \times 10^{6}\) ft³
B\(1.79 \times 10^{8}\) ft³
C\(1.79 \times 10^{10}\) ft³
D\(1.79 \times 10^{12}\) ft³
#51📜 EE Pre-Board March 2016📘 PowerhouseMedium
A 50 MW coal-fired power plant has an average heat rate of 11,000 BTU/kWHR. Coal has a heating value of 13,000 BTU per pound. The plant has a load factor of 80%. How much coal is burned per day?
A\(8.1 \times 10^{6}\) lb
B\(8.1 \times 10^{5}\) lb
C\(1.2 \times 10^{5}\) lb
D\(7.2 \times 10^{5}\) lb
#52📜 EE Pre-Board March 2016📘 PowerhouseMedium
A small wind generator is designed to generate 50 kW of power at a wind velocity of 25 miles per hour. What is the approximate blade diameter?
A9.98 m
B12.98 m
C11.98 m
D10.98 m
#53📜 EE Pre-Board March 2016📘 PowerhouseMedium
In a certain country, the equivalent fuel reserve for power generation is \(3 \times 10^{6}\) MW-years. The present peak power demand is 200 GW, and the expected power consumption growth rate is 2.1 percent. How long will the fuel reserve last?
A8 years
B11 years
C13 years
D14 years
#54📜 EE Pre-Board August 2017📘 PowerhouseMedium
A hydroelectric generating station is supplied from a reservoir of capacity \(5 \times 10^{8}\) m³ at a head of 200 meters. Find the total energy available in kWh if the overall efficiency is 75%.
A\(2.044 \times 10^{6}\) kWh
B\(2.725 \times 10^{8}\) kWh
C\(2.044 \times 10^{8}\) kWh
D\(7.36 \times 10^{14}\) kWh
#55📜 EE Pre-Board August 2017📘 PowerhouseMedium
A 75 MW steam power station uses coal of calorific value 6,400 kcal/kg. Thermal efficiency of the station is 30% while electrical efficiency is 80%. Calculate the coal consumption per hour when the station is delivering its full output.
A33.6 tons
B10.1 tons
C52.5 tons
D42 tons
#56📜 EE Pre-Board March 2018📘 PowerhouseMedium
A power plant consumes 3,600 tons of coal per day. If the coal has an average energy content of 10,000 BTU/lb, what is the plant’s power output? Assume an overall efficiency of 15 percent.
A132 MW
B130 MW
C128 MW
D126 MW
#57📜 EE Pre-Board August 2018📘 PowerhouseMedium
A wind generator with an efficiency of 80% has a blade diameter of 20 m. If the wind velocity is 30 Km/hr, how much power in KW is obtained from the generator?
