Test # 57
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1500 questions in 150 tests. Each test contains 10 questions.
Idiom of the Day
back up (something) or back (something) up
to drive or go backwards
The driver had to back the truck up.
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Precautions while using CNG
Natural gas has been distributed safely for years. In most circumstances, it is delivered via underground pipeline networks, the same networks that deliver natural gas to our homes and businesses. This method not only eliminates the need for road tankers to deliver fuel from the refinery, but also the need for ocean going oil tankers to deliver crude oil to the refinery. Hazards associated with each of these delivery methods are unfortunately well known and even in the event of a harmless spill i.e. without any resulting fire the issues associated with cleaning up present additional safety and environmental problems.