An R22 system specifies a subcooling of 10°F at the current operating conditions. The technician measures a liquid pressure of 226 psig and a liquid line temperature of 90°F. The system is
A) undercharged B) overcharged C) charged correctly
B
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? Identify and state the historical significance of Common Sense.
What will be an ideal response?
What happens when the compressor discharge pressure falls below the pressure in the discharge line?
A. Forward flow stops and gas from the discharge line flows backward. B. Forward flow increases and overcomes the line pressure. C. Upstream line pressure drops as well as the process temperature. D. The compressor will make loud noises.
If these data were collected on a Tuesday in March, estimate the AADT on this section of highway. Assume the expansion factors given in Tables 4.6, 4.7, and 4.8 apply. Determine the following below:
a) Estimate the 24-h volume using the factors given in Table 4.6.
b) Adjust the 24-h volume for Tuesday to an average volume for the week using Table 4.7.
c) To obtain the AADT, use the factor for March shown in Table 4.8.
A traffic count taken on a rural highway between 7:00 a.m. and 2:00 p.m. on a rural highway found hourly volumes as follows:
What should you do before beginning any diagnostic and repair procedure using an emissions analyzer, before performing any repairs?
What will be an ideal response?