Describe the process of natural convection
What will be an ideal response?
Natural convection occurs because of differences in fluid density. In a room with a heat source near the floor, warm air is less dense and rises. It gives off some of its heat, cools, becomes denser and falls back down. This establishes a natural convection circulation pattern.
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Which of the following termination classes is the only one that provides a seal against external elements
a. Class 1 b. Class 2 c. Class 3 d. Class 5
The map shows a portion of the State of______in the UTM zone______The SPCS is based on the
Fill in the blank(s) with the appropriate word(s).
for the case when the motor frequency is reduced to 50 Hz and the voltage sequence is reversed. Assume that the converter is a fixed v/f controller.
a. Motor current before the countercurrent braking b. Motor current just after the voltage sequence is reversed c. Current at the moment when the motor stops d. Motor torque at the condition of part (c) e. Motor current at the new steady-state point f. Motor torque at the new steady-state point g. Motor speed at the new steady-state point
The class ________ switch is one of the most complex digital switches in the network because it is responsible for all line-side terminations
A) 2 B) 5 C) 3 D) 4 E) 1