What did James Watt achieve when he manufactured his 1765 steam engine?
A. the first steam engine
B. the first turbine
C. quadruple the thermal efficiency of any previous engine
D. double the cylinder operating pressure of any previous engine
Answer: C
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What NEC chapter would you expect to find rules that apply to the installation of equipment and materials such as receptacles, panelboards, electrical motors, and transformers?
a. Chapter 2, Wiring and Protection b. Chapter 3, Wiring Methods and Materials c. Chapter 4, Equipment for General Use d. Chapter 5, Special Occupancies
A stream feeding a low-head hydro system is flowing at a rate of 710 gal/hr. Rounded off to 2 decimal places, what is this flow in l/min??
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about a chain hoist is correct?
a. A chain hoist and a ratchet-lever hoist are the same thing. b. A choker should always be used with a chain hoist. c. A chain hoist and a chain fall are not the same thing. d. They are designed so that the chain can be wrapped around the load.
An insulator is a material that has free electrons available.
Answer the following statement true (T) or false (F)