Describe observation elevators.
What will be an ideal response?
Observation elevators move up a hoistway secured to the exterior of a building. Cars are designed with glass walls to provide panoramic views of surrounding areas as the elevator rises. The elevators may be geared, gearless, or hydraulic, and the hoisting machinery is hidden. The lower end of the hoistway (at the ground) must be enclosed with a safety barrier. As with all circulation systems, elevators doors and cars must be large enough to accommodate wheelchair use.
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Propagation by hardwood is one of the easiest processes and least expensive methods of vegetative or asexual propagation
Indicate whether the statement is true or false
The first thing to do before performing any line entry is _____.
a. clear and barricade an area to keep personnel safe b. lock out and tag all electrical switches c. manually activate mechanical devices d. drain all materials from the pipeline
Switches connected in parallel have what relationship?
A. AND logic B. OR logic
A major component of any foundation, concrete is a green material in all stages of its life span, from raw material production to demolition, making it a natural choice for sustainable home construction.
Answer the following statement true (T) or false (F)