Title: Exam 1
Course: SGRD 105 Microgrids and Renewable Energies > Section: SGRD 105 Microgrids and Renewable Energies

Q: Flow of charge from high voltage to low voltage is called
- Electric field
- Current
- Inductance
- Capacitance
A: Current

Q: 1. A 240 V power supply delivers 2.0 A of current to a motor. The power supplied to the motor
- 480 W
- 120 W
- 240 W
- 360 W
A: 480 W

Q: 1. Series circuits
- have a single resistor
- have the same potential across each component
- have the same current through each component
- dissipate the same power across each resistor
A: have the same current through each component

Q: Parallel circuits
- have a single resistor
- have the same potential across each component
- have the same current through each component
- dissipate the same power across each resistor
A: have the same potential across each component

Q: The primary difference between direct and alternating current is
- alternating current produces less wire losses
- direct current periodically changes direction
- direct current produces less wire losses
- alternating current periodically changes direction
A: alternating current periodically changes direction

Q: Which of the following is not considered to be a distributed energy resource
- Microturbine
- Fuel cell
- Coal fired steam power plant
- Photovoltaic array
A: Coal fired steam power plant

Q: A rectifier
- Converts DC to AC
- Converts AC to DC
- Stores electrical energy
- Transforms AC voltages
A: Converts AC to DC

Q: In islanded mode, adjustable loads on a microgrid may be
- supplied by microsources
- supplied by storage sources
- disconnected by the microgrid energy manager
- all of the above
A: all of the above

Q: What device conditions DC power produced by photovoltaic systems for connection to the grid ?
- Inverter
- Rectifier
- Capacitor
- Inductor
A: Inverter

Q: The process by which a microgrid isolates itself from the larger electrical grid is called
- islanding
- net metering
- peak shaving
- load leveling
A: islanding

Q: Cogeneration of electricity and usable heat is known as
- distributed generation
- combined heat and power
- combined cycle power
- reversible heat engine
A: combined heat and power

Q: The overall efficiency of a system that utilizes waste heat from electricity production compared to a system that does not
- is lower
- is the same
- is higher
- equals 100 %
A: equals 100 %

Q: Heat rate is
- fuel energy used per kWh electrical power output
- thermal energy produced per second
- electrical energy produced per second
- solar heating per unit area
A: fuel energy used per kWh electrical power output

Q: Typical microturbine efficiencies are
- 5 - 15 %
- 75 - 85 %
- 25 - 35 %
- 90 - 100 %
A: 25 - 35 %

Q: Use of waste heat from electricity production for heating and cooling is called
- cogeneration
- trigeneration
- combined cycle power
- gasification
A: trigeneration

Q: To increase the current of a fuel cell stack, individual fuel cells are connected in
- series
- parallel
A: parallel

Q: At the cathode of a proton exchange membrane fuel cell
- hydrogen dissociates into protons and electrons
- oxygen combines with hydrogen to produce water
- hydrogen combines with a carbonate ion
- methanol combines with water
A: oxygen combines with hydrogen to produce water

Q: A fuel cell converts what kind of energy to electrical energy
- nuclear energy
- mechanical energy
- chemical energy
- gravitational energy
A: chemical energy

Q: At the anode of a proton exchange membrane fuel cell
- hydrogen dissociates into protons and electrons
- oxygen combines with hydrogen to produce water
- hydrogen combines with a carbonate ion
- methanol combines with water
A: hydrogen dissociates into protons and electrons

Q: Which of the following is a “high temperature” fuel cell capable of internal reforming of H2 gas?
- molten carbonate FC
- direct methanol FC
- phosphoric acid FC
- proton exchange membrane FC
A: molten carbonate FC