Which of the following types of equipment can be used in residential construction by one worker to set square wall intersections and partitions?
A) Water level B) Multi-projection laser level
C) Leveling vial D) Total station
B
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Describe the balance of system equipment required for a residential grid-connected system that generates DC current.
What will be an ideal response?
The standard mechanical pencil are numbered as:
A. P, P-1, P-2, P-3 B. HB, H, H-1, H-2, H-3, H-4 C. PH, PH-1, PH-2, PH-3 D. PN, PN-1, PN-2, PN-3, PN-4
The advantage of the backward-curved centrifugal fan over the forward-curved centrifugal fan is that:
A) Backward-curved fans operate at lower RPM. B) Backward-curved centrifugal fans are well suited for small airflow quantities. C) Backward-curved fans are normally quieter in operation. D) Backward-curved fans are non-overloading.
What is the nozzle closing pressure (NOP) equivalent to on a typical hydraulic injector?
A. 10 to 20 percent lower than the NOP. B. 10 to 20 percent higher than NOP. C. Equal to NOP. D. 99.9 percent of the NOP.