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What is the full form of VRA?

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What is the full form of VRA?

(a) Vibration resistant appliance

(b) Vehicle Refueling Appliances

(c) Volatile removal assembly

(d) Validated requirement authority

The question was posed to me during a job interview.

My question is from Applications of Biogas & Gasifier topic in section Biomass Energy of Energy Engineering

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Correct choice is (b) Vehicle Refueling Appliances

To explain: Vehicle refueling appliance is abbreviated as VRAs. Certified natural gas compressors for refueling the vehicles are commercially available. These allow refueling at home and work. After upgrading with the above-mentioned technologies, the biogas (transformed into biomethane) can be used as vehicle fuel in adapted vehicles.

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