WorksheetsTask 8 - Producing Micro Renewable Energy
Total questions: 15
Worksheet time: 23mins
What are the two types of micro renewable connections?
On-grid and Off-grid
Parallel and Series
Direct and Alternating
Primary and Secondary
What are the key components of an off-grid PV system?
PV modules, A PV module mounting system, D.C cabling, A charge controller, A deep-discharge battery bank, An inverter
PV modules, A PV module mounting system, A.C cabling, A charge controller, A deep-discharge battery bank, An inverter
PV modules, A PV module mounting system, D.C cabling, A charge controller, A shallow-discharge battery bank, An inverter
PV modules, A PV module mounting system, D.C cabling, A charge controller, A deep-discharge battery bank, A transformer
What does the term Azimuth mean?
The angle that the panel direction diverges from facing due south.
The speed of the wind at a particular location.
The height at which a wind turbine is mounted.
The amount of energy produced by a wind turbine.
What are the two types of micro-wind turbines suitable for domestic installation use?
Pole Mounted, free-standing wind turbines and Building-mounted wind turbines.
Offshore wind turbines and Onshore wind turbines.
Horizontal-axis wind turbines and Vertical-axis wind turbines.
Large-scale wind turbines and Small-scale wind turbines.
What does the term ‘Wild’ mean in terms of output?
Wild alternating current (a.c) that varies in both voltage and frequency.
A constant direct current (d.c) output.
A stable alternating current (a.c) output.
A low voltage direct current (d.c) output.
What are the four location and building requirements for micro wind turbines?
Average wind speed on site, any obstructions and turbulence, height at which the turbine can be mounted, turbine noise, vibration, flicker.
Proximity to water, average temperature, soil type, building material.
Sunlight exposure, average rainfall, soil pH, building height.
Proximity to power lines, average humidity, soil moisture, building age.
What is the minimum wind speed needed to generate electricity?
5 m/s
10 m/s
15 m/s
20 m/s
What are the advantages of micro wind turbines?
They can be very effective on a suitable site, there are no carbon dioxide emissions, they produce most energy in winter, a feed-in tariff is available, effective where mains electricity does not exist.
They are very expensive to install, they require constant maintenance, they produce most energy in summer, no feed-in tariff is available, ineffective where mains electricity exists.
They are only effective in urban areas, they emit carbon dioxide, they produce least energy in winter, no feed-in tariff is available, effective where mains electricity exists.
They are ineffective on a suitable site, they emit carbon dioxide, they produce most energy in summer, a feed-in tariff is available, ineffective where mains electricity does not exist.
What are the disadvantages of micro wind turbines?
Low initial costs
High performance regardless of wind availability
Initial costs are high
No noise, vibration, or flicker
What are the six components of the water course construction?
Intake, canal, forebay, penstock, powerhouse, tailrace
Intake, canal, forebay, penstock, generator, tailrace
Intake, canal, reservoir, penstock, powerhouse, tailrace
Intake, canal, forebay, penstock, powerhouse, outlet
What is meant by the term 'gross head'?
The horizontal distance between the inlet and outlet
The vertical height difference between the proposed inlet position and the proposed outlet
The pressure difference between the inlet and outlet
The flow rate of water through the turbine
What is meant by the term 'net head'?
The total height of the watercourse
The height difference minus losses due to friction
The pressure at the inlet
The flow rate of water through the penstock
Name the different types of turbine available for the installation.
Impulse turbine, Pelton, Turgo, Cross Flow or Banki, Reaction Turbine, Francis Wheel
Impulse turbine, Pelton, Turgo, Cross Flow or Banki, Reaction Turbine, Kaplan
Impulse turbine, Pelton, Turgo, Cross Flow or Banki, Reaction Turbine, Propeller
Impulse turbine, Pelton, Turgo, Cross Flow or Banki, Reaction Turbine, Bulb
What impacts can a micro hydro turbine have on the environment?
The landscape and visual amenity
Nature Conservation
The water regime
All of the above
What does the Environmental Site Audit (ESA) cover in the initial assessment process?
Water resources
Conservation
Chemical and Physical water quality
All of the above
