Question

in some applications, such as urban transit passenger buses, as many as eight or more cng cylinders are mounted on the roof and are encased in a special, ______ enclosure.

o a. heavy plastic
o b. fiberglass
o c. silicon
o d. aluminum

Explanation:

CNG cylinders on urban transit buses need a durable enclosure. Fiberglass is lightweight, strong, and resistant to corrosion, making it suitable. Heavy - plastic may not be as durable. Silicon is not typically used for such enclosures. Aluminum, while strong, may not offer the same level of protection and weight - efficiency as fiberglass in this context.

Answer:

B. Fiberglass