In warm weather, concrete block should not be laid on the footing until _____ have/has passed.
A. two weeks
B. one week
C. 3 days
D. 48 hours
Answer: C
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What are the good qualities achieved by using transformers with high K-ratings? Select all that apply.
A) Quieter operation. B) Less magnetic flux. C) Reduced I2R distribution losses. D) Reduced heat generation.
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The main way for crew leaders to encourage crew safety is to _____.
a. conduct regular workplace inspections b. create unsafe conditions to test workers c. set a good example for them d. promote good communication
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Plants that host nitrogen-fixing bacteria are called ____
A) legumes B) vegetables C) microorganisms D) nematodes
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Which type of copper tubing is used for water services?
A. Type ACR B. Type DWV C. Type M D. Type K
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