What pressure must compressed natural gas (CNG) be stored at in vehicle fuel tanks?
A. ambient pressure
B. 230 psi (16 bar)
C. 3000 to 4500 psi (200 to 310 bar)
D. at whatever the required injection pressure is
Answer: C
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The seams between vinyl floor covering sheets are
A) adhered together with a urethane adhesive. B) adhered together with an epoxy resin. C) welded together with hot air. D) welded together with hot air and vinyl bead. E) adhered together with a vinyl adhesive.
Beam form bottoms made from plywood should be supported by 2 × 4 members and use plywood with a minimum thickness of _____.
a. 3/8" b. 1/2" c. 3/4" d. 1"
A pesticide is more likely to contaminate groundwater if it has which of the following characteristics?
A) highly soluble in water B) highly volatile (high vapor pressure) C) rapidly degraded by soil microorganisms D) strongly adsorbed to soil colloids E) all of the above
Refer to the figure. Determine the rise of pipe K
Fill in the blank(s) with the appropriate word(s).