Troubleshooting A/C unit with TEV (10 SEER or less) - Diagnosis: Low Charge
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For the following cell pattern,
(a) Find the reuse distance if radius of each cell is 2 km.
(b) If each channel is multiplexed among 8 users, how many calls can be
simultaneously processed by each cell if only 10 channels per cell are
reserved for control, assuming a total bandwidth of 30 MHz is available
and each simplex channel consists of 25 kHz?
(c) If each user keeps a traffic channel busy for an average of 5% time and an
average of 60 requests per hour are generated, what is the Erlang value
Like charges ________
A) repel B) attract C) have no effect on each other
The minimum distances from each of the furnace surfaces to any combustible materials describes which of the following?
A) the furnace regulations B) the furnace measurements C) the minimum furnace clearance D) the furnace clearance maximums
Why must you cover the coils when testing the heat pump in warm weather?
A) to trigger the temperature valve to release excess pressure B) to prevent the heat pump from overloading the compressor C) to reduce the amount of heat lost from the system D) to increase the amount of heat delivered to the system