When is it acceptable to braze with the acetylene tank lying on its side?
a. If space is limited
b. If the tank is almost empty
c. If the tank is completely full
d. It is never acceptable
d
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Why do electronic EPRs provide better case temperatures than mechanical EPRs?
a. EEPRs are more accurate at sensing suction line pressures. b. EEPRs sense the case discharge air temperature rather than suction pressure. c. EEPRs can open and close much faster than mechanical EPRs.
The cad cell senses the flames by
A) By dropping in resistance when exposed to light B) By increasing in resistance when exposed to heat C) By increasing in resistance when exposed to light D) By dropping in resistance when exposed to heat
Forces tend to do what to objects upon which they act?
a. move them b. rotate them c. elongate, shorten them, or bent them d. all of the above
Automatic control is a system where a process variable is forced to remain at a desired value called the controller output point
Indicate whether the statement is true or false