ES115 REVIEW (LATEST UPDATE) REAL QUESTIONS AND
VERIFIED ANSWERS | 100% CORRECT | ALREADY
GRADED
Which one of the following is not a unit of energy? Ans✓✓✓ MMBTU
per hour
If your microwave is rated at 900 W, how much electricity in kWh will
it consume when you heat up your coffee for 2 minutes? Ans✓✓✓ 0.03
kWh
Which fuel is likely to emit lower carbon emissions per unit of energy?
Ans✓✓✓ Natural gas (methane) CH4
The Human Development Index continues to increase with per capita
energy consumption. Ans✓✓✓ False
Which one of the following is not considered a criteria air pollutant by
the EPA? Ans✓✓✓ Carbon dioxide
In burning a mole of propane (C3H8), how many moles of CO2 are
emitted? Ans✓✓✓ 3
The number of people using solid fuels for cooking has decreased
significantly across the world over the last 3 decades. Ans✓✓✓ False
,How many joules are in a kWh? Ans✓✓✓ 1 kWh * 3600 s/h * 1000 J/kJ
= 3.6e6 J
Secondary energy Ans✓✓✓ Electricity
Primary energy Ans✓✓✓ Crude oil
If the temperature in the boiler of a coal power plant is 500oC and the
temperature of the condenser in its steam cycle is 30oC, what is the
Carnot efficiency of this power plant? Ans✓✓✓ 61%
A biomass power plant has a rated capacity of 200 MW. In 2019, this
power plant produced 1000 GWh. What was the capacity factor of this
power plant? [hint: Number of hours in a year = 8760 h] Ans✓✓✓ 57%
If annual emissions at a regulated coal power plant exceed SO2
allowances allocated to that plant, which of the following is NOT an
option? Ans✓✓✓ Plant owner could reduce the temperature of the boiler
The US is a net exporter of natural gas Ans✓✓✓ True
Which type of power plant is on an average the most efficient among the
following? Ans✓✓✓ Combined Cycle Gas Turbine power plant
, Which of the following is the most efficient cooling system for a
Rankine steam cycle power plant? Ans✓✓✓ Once through cooling
system
Decreasing the temperature in the boiler of a coal power plant will
decrease the efficiency of the power plant Ans✓✓✓ True
Match the laws of thermodynamics to their definitions (First Law)
Ans✓✓✓ Energy can be transformed from one form to another but not
created or destroyed.,
Match the laws of thermodynamics to their definitions.(Zeroth Law)
Ans✓✓✓ If two thermodynamic systems are in equilibrium with a third,
then they are in equilibrium with each other,
Match the laws of thermodynamics to their definitions.(Second Law)
Ans✓✓✓ Heat cannot be converted to work without creating some
waste heat.
How many interconnections (separate AC grids) exist in the US?
Ans✓✓✓ 3-Western Interconnect, Eastern Interconnect, and the
Electricity Reliability Council of Texas (ERCOT)
Which entity operates the wholesale electricity market? Ans✓✓✓
Independent System Operator (ISO)
VERIFIED ANSWERS | 100% CORRECT | ALREADY
GRADED
Which one of the following is not a unit of energy? Ans✓✓✓ MMBTU
per hour
If your microwave is rated at 900 W, how much electricity in kWh will
it consume when you heat up your coffee for 2 minutes? Ans✓✓✓ 0.03
kWh
Which fuel is likely to emit lower carbon emissions per unit of energy?
Ans✓✓✓ Natural gas (methane) CH4
The Human Development Index continues to increase with per capita
energy consumption. Ans✓✓✓ False
Which one of the following is not considered a criteria air pollutant by
the EPA? Ans✓✓✓ Carbon dioxide
In burning a mole of propane (C3H8), how many moles of CO2 are
emitted? Ans✓✓✓ 3
The number of people using solid fuels for cooking has decreased
significantly across the world over the last 3 decades. Ans✓✓✓ False
,How many joules are in a kWh? Ans✓✓✓ 1 kWh * 3600 s/h * 1000 J/kJ
= 3.6e6 J
Secondary energy Ans✓✓✓ Electricity
Primary energy Ans✓✓✓ Crude oil
If the temperature in the boiler of a coal power plant is 500oC and the
temperature of the condenser in its steam cycle is 30oC, what is the
Carnot efficiency of this power plant? Ans✓✓✓ 61%
A biomass power plant has a rated capacity of 200 MW. In 2019, this
power plant produced 1000 GWh. What was the capacity factor of this
power plant? [hint: Number of hours in a year = 8760 h] Ans✓✓✓ 57%
If annual emissions at a regulated coal power plant exceed SO2
allowances allocated to that plant, which of the following is NOT an
option? Ans✓✓✓ Plant owner could reduce the temperature of the boiler
The US is a net exporter of natural gas Ans✓✓✓ True
Which type of power plant is on an average the most efficient among the
following? Ans✓✓✓ Combined Cycle Gas Turbine power plant
, Which of the following is the most efficient cooling system for a
Rankine steam cycle power plant? Ans✓✓✓ Once through cooling
system
Decreasing the temperature in the boiler of a coal power plant will
decrease the efficiency of the power plant Ans✓✓✓ True
Match the laws of thermodynamics to their definitions (First Law)
Ans✓✓✓ Energy can be transformed from one form to another but not
created or destroyed.,
Match the laws of thermodynamics to their definitions.(Zeroth Law)
Ans✓✓✓ If two thermodynamic systems are in equilibrium with a third,
then they are in equilibrium with each other,
Match the laws of thermodynamics to their definitions.(Second Law)
Ans✓✓✓ Heat cannot be converted to work without creating some
waste heat.
How many interconnections (separate AC grids) exist in the US?
Ans✓✓✓ 3-Western Interconnect, Eastern Interconnect, and the
Electricity Reliability Council of Texas (ERCOT)
Which entity operates the wholesale electricity market? Ans✓✓✓
Independent System Operator (ISO)
