Which of the following statements is correct?
A) The number of ladder logic virtual relays and input and output instructions is limited only by memory size.
B) The number of contacts for a mechanical relay is limited to number of coils on the relay.
C) A ladder logic program is hard to analyze because it is totally different when compared with the equivalent relay logic solution.
D) Ladder logic is a PLC graphical programming technique introduced in the last 10 years.
A
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Which characteristic automatically categorizes a crane operation as a critical lift?
a. The load is nearly 75 percent of the crane’s load-chart capacity. b. The operation involves a multi-crane lift. c. The crane must travel with the load. d. High-voltage power lines cross the facility involved in the lifting operation.
____________________ is the application of a force that results in a rotational motion.
Fill in the blank(s) with the appropriate word(s).
The diesel injection pump is usually driven by a _______
A) Shaft drive off of the crankshaft B) Chain drive off of the camshaft C) Belt off the crankshaft D) Gear off the camshaft
The LEED program standards are developed by:
A) NHAB - National Association of Home Builders. B) EPA - Environmental Protection Agency. C) USGBC - United States Green Building Council. D) DOE - Department of Energy.