The most commonly used fuel cell in concept vehicles is the ____.
A. fuel exchange membrane
B. oxygen exchange membrane
C. electron exchange membrane
D. proton exchange membrane
Answer: D
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A diesel engine produces a vibration complaint. Which of the following would be the more likely cause?
A. oil level in pan at low mark on dipstick B. dent in the viscous vibration damper C. broken cylinder head bolt D. advanced injection timing
Soil for planting strawberries should _____
A) have a pH range of 6.5-7.0 B) be prepared 1 to 2 years before planting date C) be low in magnesium D) none of the above
The R in the term R-value stands for ____________________
Fill in the blank(s) with the appropriate word(s).
What is the maximum safe acetylene flow pressure that should be set at the regulator?
A. 5 psi B. 15 psi C. 105 psi D. 150 psi