Which of the following statements about metal raceways and enclosures for service conductors is true?
A. To be considered grounded, the metal raceway must be connected directly to a
grounding electrode.
B. Metal raceways for service conductors are considered grounded if they are connected to
a service enclosure that is grounded.
C. The metal pulling elbows in a run of underground nonmetallic conduit are required to
be grounded irrespective of burial depth.
D. The metal pulling elbows in a run of underground nonmetallic conduit are required to
be grounded only if they are within 12 in. (304 mm) of the surface.
B. Metal raceways for service conductors are considered grounded if they are connected to
a service enclosure that is grounded.
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Wire, synthetic ropes, or fiber ropes used for scaffolding suspension should be capable of supporting at least _____ times the rated load.
A. two B. three C. five D. six
A fastener that must be installed before the cement has set is a(n) _____.
a. concrete insert b. expanding concrete fastener c. double expanding anchor d. toggle bolt
On a clear day, the total solar irradiance striking the Earth is about _____ watts per square meter.
Fill in the blank(s) with the appropriate word(s).
Directions: Read the following statements regarding fire hydrants and select your answer from choices A through D. STATEMENT 1 When inspecting fire hydrants, firefighters should first check visibility and accessibility of the hydrants. STATEMENT 2 Hydrants should be positioned so that the connections, especially the large steamer connection are facing the street. STATEMENT 3 Trash or other foreign objects placed inside the empty barrels of dry-barrel hydrants can obstruct water flow and/or damage a fire department pumper if they are drawn into the pump.
A. Statement 1 is true; statements 2 and 3 are false. B. Statements 1 and 2 are true; statement 3 is false. C. Statement 1 is false; statements 2 and 3 are true. D. All three statements are true.