Lines on drawings used to indicate an area that has been cut away and shown in a section view are called
_____.
a. extension lines
b. break lines
c. phantom lines
d. cutting plane lines
d
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When ordering fixture trim, you must consider and determine which of the following?
a. quantity b. type c. style of the items d. all of the above
___________ heads discharge a fine, uniform spray of water in a full circle or partial circle
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. For maximum transfer of power, the external devices connected to an amplifier must exceed the input and output impedances of the amplifier. 2. A transistor amplifier usually amplifies an AC signal, but first it needs a DC voltage (bias) to supply its operating power. 3. A transistor amplifier configuration is determined by the relationship between the DC input signal and the AC/DC output signal. 4. The common-emitter (CE) is the most widely used amplifier configuration. 5. The common-collector has a low output impedance.
Controlled experiments are those that:
A. are most often used in ecological research. B. require only a few replications because everything is rigorously controlled. C. are performed in controlled environments such as greenhouses and growth chambers. D. have an outcome that is only influenced by the factor being studied.