The most frequently used method of consolidation for larger projects is _____.
a. power rodding
b. hammering on forms
c. vibration
d. tamping
Answer: C
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Las dimensiones de un bloque de concreto típico son _____ pulgadas.
a. 8 × 8 × 16 b. 4 × 4 × 8 c. 6 × 12 × 8 d. 2 × 4 × 12
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Which of the following is a cause of contamination of the back side of the molten weld pool?
A. Failure to remove the root edge B. Insufficient heat, insufficient filler metal C. Overheating, poor cleaning procedures D. Excessive root reinforcement
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Which of the following refrigerants do not contain chlorine?
A. R-404a B. R-502 C. R-22 D. R-12
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Which two types of heat can an evaporator remove from the air?
A. radiant, conduction B. sensible, radiant C. latent, sensible D. superheat, subcooling
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