____ seal tips must be tightened with a wrench.
A. O-ring
B. Gasket
C. Metal-to-metal
D. Rubber
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. A solenoid-controlled valve cannot be used to control air or hydraulic circuits. 2. A solenoid designed to operate on alternating current can also be operated on direct current. 3. Spring return valves are not very common in industry. 4. The OFF delay timer will begin timing when the relay coil is energized. 5. It is important to remember that the contacts on a latch coil will NOT return to their unoperated condition unless the unlatch coil is energized.
Carbon monoxide detectors are required in all _________.
A. Installations B. Industrial installations C. Commercial Installations D. Residential Installation
The dimensions of a square duct with a grooved seam are: side = 8 inches; length = 2 1/2 feet; M = 1/8 inch. Find in inches the value of W.S.
Fill in the blank(s) with the appropriate word(s).
The bridge rectifier in Figure P.9.37 is driven by a sinusoidal voltage source vs(t) = 6 sin(314t) V. Determine the average and peak forward current through each diode and Ro = 200?. Assume ideal diodes.
