In single-loop systems, the ____ prevents hot water in the boiler from slowly circulating through the distribution system when the circulator is off.
a. diaphragm
b. thermosiphon
c. off switch
d. flow-check valve
d. flow-check valve
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____________________ grease has a consistency that allows it to be applied through a zerk fitting with a grease gun.
Fill in the blank(s) with the appropriate word(s).
Refer to Figure P2.59. Assume vS = 20 V, R1 = 10 ? , R2 = 5 ? , R3 = 8 ? , R4 = 2 ? , R5 = 4 ? , R6 = 2 ? , R7 = 1 ? , and R8 = 10? . How many nodes are in the circuit? Use KCL and Ohm’s law to determine: a. The current in the resistor R7. b. The equivalent resistance seen by the voltage source vS .
What will be an ideal response?
What does the presence of a 4-pin communications connector on an ECM signify?
a. It is a newer version motor. b. It can only be used in furnaces. c. It is a 240V-only motor. d. The motor needs 24V input signals.
A jumper wire is used to bypass a load.?
Answer the following statement true (T) or false (F)