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WorksheetsPage 1
Total questions: 20
Worksheet time: 10mins
According to the color key in the schematic, which color represents the distribution system?
Red
Blue
Green
Black
Which of the following is NOT listed as a type of topping cycle CHP plant?
Combined-cycle topping CHP plant
Steam-turbine topping CHP plant
Gas turbine topping CHP plant
Diesel engine topping CHP plant
For the steam-turbine topping CHP plant, how is the exhaust steam primarily utilized?
As high-pressure steam for another turbine
As low-pressure process steam to heat water for various purposes
To preheat combustion air
To drive an absorption chiller only
Which statement best differentiates domestic load from commercial load in terms of daily usage patterns?
Domestic load typically occurs for more hours during the day than commercial load.
Commercial load typically operates for more hours during the day and shows seasonal variation due to air conditioners and heaters.
Domestic load shows pronounced seasonal variations due to air conditioner usage, whereas commercial load does not.
Both domestic and commercial loads run continuously for 24 hours with minimal variation.
An irrigation scheme uses electric pumps driven by motors to supply water to fields, predominantly for 12 hours during the night. Which load type is described?
Commercial load
Industrial load
Municipal load
Agricultural load
Which activity is most representative of domestic load as defined in the material?
Operating a steel rolling mill
Running refrigeration and lighting in a restaurant
Using fans, refrigerators, and televisions in residences
Pumping water for municipal drainage
What practical use of the monthly load curve is explicitly stated?
Sizing street lighting circuits
Fixing the rates of energy
Determining motor starting currents
Selecting generator cooling systems
Which point on the daily load curve represents the maximum demand on the station for that day?
The centroid of the curve
The lowest point of the curve
The highest point of the curve
The area under the curve
Using the given expression, how is Average load defined from the daily load curve?
Highest load divided by 24 hours
Area (in kWh) under the daily load curve divided by 24 hours
Sum of hourly loads divided by the number of days in a month
Rated capacity times load factor
Which definition matches Maximum Demand as provided?
Average load over the billing period
Greatest demand of load on the power station during a given period
Sum of ratings of all equipment connected to supply
Peak of the annual load duration curve only
A system’s maximum demand is 50 MW and average load is 35 MW during a day. What is the load factor for that day?
0.50
0.60
0.70
0.80
Which ratio defines the diversity factor?
Average load to maximum demand
Sum of individual maximum demands to maximum demand on power station
Energy produced to possible energy
Maximum demand to sum of individual average loads
A utility plans to handle a foreseeable increase in load. Which metric directly represents the margin designed for such future demand?
Utilization factor
Reserve capacity
Plant capacity factor
Installed capacity
Which reserve is in operation but not in service?
Spinning Reserve
Cold Reserve
Hot Reserve
Utilization reserve
In power system distribution, which definition best captures the diversity factor?
Ratio of average demand to installed capacity
Ratio of sum of individual peak demands to the network's peak demand
Ratio of maximum demand to connected load
Ratio of base load to peak load
A facility has total installed full-load current equal to twice its typical running load current. What is the diversity factor?
0.5
1
2
4
According to the notes, how does diversity factor affect the cost of power generation?
Greater diversity factor increases cost due to reserve margins
Greater diversity factor has no effect on cost
Greater diversity factor reduces the cost of generation
Cost depends only on fuel price, not diversity
A power plant’s base load is best described as which of the following?
The highest instantaneous demand served for short periods
The minimum continuous demand the plant is designed to meet over time
The reserve capacity kept idle for emergencies
The average of daily peak demands
If a plant’s capacity equal to the difference between peak load and base load remains idle for most of the year, what planning implication follows from the text?
Increase the base load by adding constant industrial demand
Do not supply the entire load from a single plant; coordinate multiple stations
Retire all peak plants to save fuel
Overbuild storage to absorb the idle capacity
Which reason is given for why conductor size determined by Kelvin’s law may not always be practicable?
It always underestimates insulation thickness
It can be too small for safe carrying of necessary current
It violates electromagnetic compatibility rules
It requires superconducting materials
