The cross liquid charge bulb at the TXV contains fluid that ____.
A. has similar characteristics to the system fluid to prevent liquid refrigerant from entering the suction line
B. has different characteristics from the system fluid
C. causes the valve to stay open during the off cycle
D. follows the system's pressure-temperature relationship
Answer: B
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Which type of valve is used to prevent material flow in the wrong direction?
a. Butterfly valve b. Balancing valve c. Gate valve d. Check valve
The Fugitive Slave Law of 1850 included all of the following provisions EXCEPT
A. the requirement that fugitive slaves be returned from Canada. B. denial of a jury trial to runaway slaves. C. denial of fleeing slaves' right to testify on their own behalf. D. the penalty of imprisonment for northerners who helped slaves to escape. E. a higher payment to the federal official responsible for determining the case of a fugitive if the official determined that the fugitive was a slave and not a free black person.
TYPE OF FURNACE
The flow of air through a furnace is referred to as:
a. suction b. draft c. air velocity d. O2 %