What type of valves are designed to receive high pressure at the inlet and automatically maintain a constant lower pressure at the outlet?

A. open-close
B. flow regulation
C. relief
D. automatic pressure reducing


Answer: D

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A green LED maintains a constant VLED = 2V independent of the current ILED flowing through it. The LED connects to supply VS = 5V through resistor RL = 470? to produce current ILED= ____ (x.x) mA.

Fill in the blank(s) with the appropriate word(s).

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A polyphase synchronous motor has three stator windings that are _____.

a. 45° apart b. 90° apart c. 120° apart d. 180° apart

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Identify three different, real organizations that have made sustainability an explicit consideration in their operations.

What will be an ideal response?

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Two types of shaft seals used for centrifugal pumps are ____.

A. stuffing box and mechanical types B. stuffing box and splash types C. ceramic and splash types D. ceramic and bellows types

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