When using an oscilloscope to troubleshoot a digital system, the instrument should be triggered by ________
A) the A channel or channel 1
B) the system clock
C) line sync, in order to observe troublesome power line glitches
D) the AC line voltage
B
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The longest cutback line for a 45-degree miter for a 90-degree turn on a piece of 4-inch pipe (4.5 inch OD) would be _____ inches.
a. 15/16 b. 2 c. 2-1/4 d. 2-7/8
You see a tree branch that has a large, misshapen, unsightly growth. The growth does not appear to serve any useful
function. What is such a growth called, and what category of insect might have caused it?
What will be an ideal response?Determine the forces or components of force in all bars of the truss in the figure below. Indicate tension or compression.
What is a dual-fuel heat pump?
A) An air-source heat pump added to a fossil fuel furnace. B) A heat pump that can run on either AC or DC power. C) A heat pump whose energy requirements are so massive that two fuel sources are required to operate it. D) A heat pump that can be field converted from air-source to water-source.