Introduction to Hydrogen Networks

Which statement best explains the strategic value of hydrogen storage in systems with wind and solar?

• It buffers intermittent generation over long durations

• It reduces solar panel thermal losses at noon

• It increases turbine speed during windy periods

• It amplifies grid frequency to match demand spikes

A project without integrated infrastructure needs quick deployment to balance local demand. Which storage choice is most suitable?

• Cryogenic liquid air storage with long build times

• Deep geological caverns requiring complex drilling

• High-voltage battery farms needing extensive grid works

• Specialist hydrogen vessels with lower upfront costs

In the diagram showing a vertical well into rock layers, what process creates the underground salt cavern used for hydrogen storage?

• Fracturing increases natural void spaces

• Solution mining dissolves rock salt

• Mechanical drilling removes rock layers

• Thermal melting forms an open chamber

Using the offshore diagram with repurposed caverns and platforms, which scenario most effectively leverages existing infrastructure for low-cost, large‑volume hydrogen storage?

• Repurpose natural gas caverns offshore

• Use untested shallow sand formations

• Construct new deepwater platforms only

• Store hydrogen in surface tanks at sea

Which statement best explains why ammonia (NH3) and liquid organic hydrogen carriers (LOHCs) are used in hydrogen storage systems shown in the diagram of an NH3 molecule?

• They are the only materials that bind hydrogen chemically

• They eliminate the need for cryogenic systems entirely

• They directly generate electricity without conversion losses

• They increase energy density for storage and transport

Which infrastructure element connects clean hydrogen production to end users in cities as shown in the diagram?

• High-voltage electric lines to suburbs

• Transmission pipeline to city gate

• Rail freight corridors to depots

• Marine shipping routes to ports

Which organisation funded industry-led H21 projects to test pure hydrogen in pipelines?

• Ofgem provided project funding support

• BEIS provided project funding support

• National Grid provided project funding support

• UKRI provided project funding support

Future Billing Methodology explores options to reflect differences in what property among methane, biomethane, and hydrogen?

• Molecular weight differences

• Calorific value differences

• Flame speed differences

• Leak rate differences

In what year was the Iron Mains Risk Reduction Programme introduced?

• Introduced in 2012 by regulation

• Introduced in 2002 by regulation

• Introduced in 1992 by regulation

• Introduced in 2022 by regulation

Which realistic outcome is expected from decommissioning iron mains and replacing them with plastic pipes?

• Improved suitability for transporting hydrogen

• Immediate reduction in gas calorific content

• Elimination of transmission network bottlenecks

• Guaranteed zero leakage across all pipelines