A circuit that has one SCR in it can ________
A) control DC voltage
B) control AC voltage
C) control both AC and DC voltage
A
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What component of a water tube boiler is a temperature control point at the outlet of the boiler steam flow that maintains a specific steam temperature by using boiler feedwater injection through a control valve?
A. Air register B. Draft fans C. Desuperheater D. Burners
Grooved pipe welds are made up of several separate weld joints.
Answer the following statement true (T) or false (F)
Heat that can be measured or sensed is referred to as:
a. latent heat of vaporization b. latent heat of condensation c. sensible heat d. latent heat of fusion
When metal parts are required to be electrically connected, a(n) ____ is installed, thereby guaranteeing the required electrical conductivity.
A. suitable ground (equipment ground) B. main bonding jumper C. appliance branch D. reliable conductor (bonding jumper)