Energy and Utilities Renewable Energy 2

Question 1

What does REC stand for in renewable energy markets?

Accepted Answer

Renewable Energy Certificate

Answer

Renewable Energy Certificates (RECs) are tradable instruments representing 1 MWh of electricity generated from a renewable source.

Question 2

What is the 'duck curve' phenomenon in power grid management?

Accepted Answer

A daily load shape with a midday solar dip and steep evening ramp resembling a duck

Answer

The duck curve describes how high midday solar generation depresses net load, then demand ramps sharply when solar fades in the evening.

Question 3

What is the nameplate capacity of a wind turbine?

Accepted Answer

The maximum rated power output under ideal conditions

Answer

Nameplate capacity is the manufacturer-rated maximum power output (in MW) a turbine can produce at its rated wind speed.

Question 4

What is 'curtailment' in the context of wind or solar power?

Accepted Answer

Reducing output below what could be generated due to grid constraints or excess supply

Answer

Curtailment occurs when operators instruct renewable plants to reduce output because transmission constraints or oversupply prevents the energy from being used.

Question 5

Which battery chemistry is most commonly deployed in utility-scale energy storage systems in the US?

Accepted Answer

Lithium-ion

Answer

Lithium-ion batteries dominate utility-scale storage due to their high energy density, declining costs, and fast response times.

Energy and Utilities Practice Test

Energy and Utilities Practice Test

Energy and Utilities Renewable Energy 2