For testing concrete from paving mixers, the whole batch should be discharged and samples taken from _____
a. three locations
b. five locations
c. seven locations
d. ten locations
b
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Find Leq in the circuit in Fig. 6.78.
 FIGURE 1.png)
What is the purpose of a flame-proving device in a system with a standing pilot?
A) It monitors the level of gas after a pilot goes out. B) It automatically resets the system when the pilot is relit. C) It shuts off the gas flow in case the pilot goes out. D) It relights the pilot if it goes out.
You face the green light, but traffic on the other side of the intersection does not follow you to travel all the way through the intersection. What must you do?
a. wait for the next green light b. wait until traffic ahead clears, so you do not block the intersection c. enter the intersection and wait until traffic ahead clears.
A three-phase alternator containing six poles is turning at 1000 RPM. What is the output frequency?
A. 30 Hz B. 40 Hz C. 50 Hz D. 60 Hz