Title: Unit 2 Quiz
Course: SGRD 100 Smart Grid Overview > Section: SGRD 100 Smart Grid Overview

Q: The SI unit of magnetic flux is the
- weber, (Wb)
- tesla, (T)
- farad, (F)
- volt, (V)
A: weber, (Wb)

Q: As magnetic field lines get farther apart, the strength of the field
- increases
- decreases
- remains the same
- none of the above
A: decreases

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: A transformer has a primary to secondary voltage of 4.2 kV to 120 V. If the current in the secondary is 12 A, the primary current is
- 12 A
- 0.343 A
- 420 A
- 2.86 A
A: 0.343 A

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 generator converts mechanical energy to
- electrical energy
- chemical energy
- gravitational energy
- nuclear energy
A: electrical energy

Q: The stationary part of a rotating field generator is called the
- core
- transformer
- rotor
- stator
A: stator

Q: Generator output voltage depends on
- rotational frequency
- number of turns
- magnetic flux per pole
- all of the above
A: all of the above

Q: A heat engine with efficiency 20 % does 200 kJ of work every cycle. The heat absorbed per cycle is
- 40 kJ
- 160 kJ
- 250 kJ
- 1000 kJ
A: 1000 kJ

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

Q: A heat engine operates between temperatures T_H = 427 °C = 700 K and T_C = 27 °C = 300 K. The maximum efficiency of the engine is
- 100%
- 43 %
- 57 %
- 94 %
A: 57 %

Q: A steam-cycle power plant operates on which of the following thermodynamic cycles
- Otto cycle
- Rankine cycle
- Brayton cycle
- Diesel cycle
A: Rankine cycle

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