Question

cng cylinders come in ______ types, ranging from heaviest to lightest.
o a. three
o b. four
o c. five
o d. six

Explanation:

CNG cylinders are classified into four types based on their construction materials and weight. Type I is made of steel (heaviest), Type II has a steel liner with a composite wrap, Type III has a thin - walled aluminum liner with a composite wrap, and Type IV has a plastic liner with a full composite wrap (lightest).

Answer:

B. Four