Test Your Knowledge: H2 Gas Flow Measurement

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* 1. Which type of flowmeter calibration provides better accuracy?

Air equivalency

Actual H2 gas calibration

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* 2. Which two H2 meter types are recognized as mass-flow measurement technologies?

Coriolis and Thermal Mass

Ultrasonic and Coriolis

Thermal Mass and Differential Pressure

Ultrasonic and Differential Pressure

Vortex Shedding and Coriolis

Turbine and Thermal Mass

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* 3. True or False: Thermal flowmeters provide direct mass flow measurement with no additional process instruments for pressure and temperature corrections.

True

False

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* 4. True or false: All thermal mass flowmeter manufacturers have the capability of using H2 as the calibration media in order to comply with ISO 14511.

True

False

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* 5. True or False: All thermal mass flowmeters are third-party approved for use in potentially explosive atmospheres where H2 may be present (for example, Div.1/Zone1, intrinsically safe or non-incendive).

True

False

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* 6. Which of the H2 production methods (brown, gray, blue, turquoise, green) can now use thermal mass flowmeters?

Gray H2 (Steam methane reforming; SMR)

Blue H2 (SMR with carbon capture & storage)

Green H2 (Water electrolysis with renewable energy)

Brown H2 (Coal gasification; syngas)

Turquoise H2 (Methane pyrolysis)

All of the choices

None of the choices

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* 7. Thermal mass flowmeters provide exceptional reliability in handling H2 gas due to which trait?

No moving parts in the fluid

Non-clogging, no dead-legs

No routine maintenance is typically required

All of the choices

None of the choices

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* 8. Which of the following flowmeter technologies has the highest flow range turndown?

Differential Pressure

Thermal Mass

Turbine

Vortex

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* 9. Which of the following choices allow for an insertion-style thermal flowmeter to be retracted from the H2 piping without shutting down the process?

Packing gland with full-port ball valve

Fixed flange or NPT process connection

Compression fitting

All of the choices

None of the choices

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* 10. True or false: Thermal mass flowmeters require a flow conditioner in small line sizes with flow in the Reynolds Transitional zone of Re 2000 to 4000?

True

False

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