Title: Exam 1
Course: SGRD 100 Smart Grid Overview > Section: SGRD 100 Smart Grid Overview

Q: A circuit has a power supply voltage of 120 V and a resistance of 60 Ω. What is the lowest rated fuse that could be used in the circuit?
- 0.5 A
- 1.0 A
- 2.0 A
- 4.0 A
A: 2.0 A

Q: 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: A 20 Ω and a 30 Ω resistor are connected in series. Which resistor dissipates more power?
- 20 Ω
- 30 Ω
- both dissipate the same power
- cannot be determined from the given information
A: 30 Ω

Q: Resistors with resistances of 5.00 Ω and 10.0 Ω are connected in parallel across a battery with voltage 12.0 V. The power dissipated in the 10.0 Ω resistor is
- 14.4 W
- 28.8 W
- 12.0 W
- 24.0 W
A: 14.4 W

Q: Two 10 Ω resistors are connected in parallel across an AC power supply with a voltage amplitude of 12 V. The current amplitude in the circuit
- 2.4 A
- 0.6 A
- 1.70 A
- 0.42 A
A: 2.4 A

Q: The average power dissipated by a light bulb is 60 W. The effective voltage across the bulb is 240 V. The effective current through the bulb is
- 4.0 A
- 2.83 A
- 0.250 A
- 0.177 A
A: 0.250 A

Q: Production of current in a conductor due to changing magnetic flux is known as
- Electromagnetic induction
- Polarization
- Ionization
- Recombination
A: Electromagnetic induction

Q: A step-up transformer has
- turns ratio = 0
- turns ratio < 1
- output voltage < input voltage
- output voltage > input voltage
A: output voltage > input voltage

Q: If the rotational speed of a generator increases,
- output frequency increases
- output voltage increases
- Both A and B
- none of the above
A: Both A and B

Q: A combustion turbine absorbs 2000 BTU of heat and exhausts 1400 BTU each cycle. Calculate the thermal efficiency of the turbine.
- 70 %
- 43 %
- 30 %
- 57 %
A: 30 %

Q: A combined cycle power plant uses waste heat from a gas combustion turbine to generate steam for
- heating
- desalination
- absorption cooling
- use in a steam turbine
A: use in a steam turbine

Q: Most energy consumed in the United States comes from
- hydroelectric
- fossil fuels
- photovoltaics
- wind
A: fossil fuels

Q: At a power plant before transmission, the voltage is usually
- stepped-down
- inverted
- rectified
- stepped-up
A: stepped-up

Q: Power is transmitted at high voltage to reduce
- ressistive losses
- plasma ionization
- arcing
- intermodulation
A: ressistive losses

Q: The final component in the power transmission system between feeder lines and residential service is a
- step-up transformer
- rectifier
- inverter
- step-down transformer
A: step-down transformer

Q: A smart meter
- is a component of advanced metering infrastructure
- provides two-way communication
- allows for real time pricing
- all of the above
A: all of the above

Q: Which of the following would typically be used for distributed generation
- Solar farm
- Nuclear power plant
- Hydroelectric power plant
- Coal-fired, steam power plant
A: Solar farm

Q: In what order are power plants dispatched
- peaker, baseload, intermediate
- baseload, intermediate, peaker
- intermediate, peaker, baseload
- peaker, intermediate, baseload
A: baseload, intermediate, peaker

Q: Demand response should result in load leveling by
- changing consumption habits
- energing rationing
- rolling blackouts
- remote disconnects
A: changing consumption habits

Q: Combined heat and power (CHP) is also known as
- distributed generation
- cogeneration
- combined cycle power
- reversible heat engine
A: cogeneration

Q: In islanded mode, microgrid loads may be
- supplied by distributed power sources
- supplied by storage sources
- disconnected by microgrid energy matter
- all of the above
A: all of the above

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

Q: A hydrokinetic system utilizes
- velocity head of free flowing water
- elevation head established by a dam
- kinetic energy of jets which turn an impulse turbine
- steam driven turbine
A: velocity head of free flowing water

Q: Which of the following is a "high temperature" fuel cell capable of internal reforming of H_2 gas
- molten carbonate FC
- direct methanol FC
- phosphoric acid FC
- proton exchange membrane FC
A: molten carbonate FC

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