What does it mean when the electrode sticks to the base metal as you are trying to strike the arc?
A. Voltage setting is too high.
B. Current setting is too high.
C. Current setting is too low.
D. Voltage setting is too low.
Answer: C
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An air conditioner with a thermostatic expansion valve is operating with a condenser saturation temperature of 95°F and a liquid line temperature of 92°F. The factory specified subcooling for the current operating condition is 10°F. The technician should:
A) Add charge because the system is undercharged. B) Recover charge because the system is overcharged. C) Move some of the charge from the low side of the system to the high side of the system to balance the charge. D) Leave the charge alone because it is cooling even better than factory specifications.
Find e-e of pipe Q
Fill in the blank(s) with the appropriate word(s).
Which of the following would you NOT expect to be true at the new steady state (compared to normal operation)?
An ammonia synthesis process normally works as follows: Fresh feed air and hydrogen are combined with a recycle stream and the combined stream is compressed to 10 MPa. The compressed stream enters a reactor, and the entering nitrogen and hydrogen are converted into ammonia until the reaction reaches equilibrium. The reactor effluent, still at 10 MPa, enters a condenser. The liquid and vapor streams leaving the condenser are in VLE. The liquid stream, which is essentially pure ammonia, is the product. A fraction of the vapor stream leaving the condenser is purged, while the rest is recycled. There is a problem with the compressors and the pressures of the reactor and the condenser both drop to 9 MPa. The fresh feed rate and the fraction of vapor leaving the condenser that is purged each remain the same, as do the reactor and condenser temperatures. The system reaches a new steady state at 9 MPa.
The two major types of doors are _____
a. solid and panel b. flush and wood c. flush and panel d. solid and metal