The two forms of spread spectrum are frequency hopping and ______________
A. direct sequence
B. continuous wave
C. spectral regrowth
D. voltage controlled
A
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A ____ is a contractual document guaranteeing certain minimal levels of service provided by a vendor.
A. memorandum of understanding B. mutual agreement C. service agreement D. time-share agreement
Technician A says during a frontal collision, the backup power supply will deploy the driver and passenger air bags if the battery becomes disconnected. Technician B says when the vehicle is involved in a severe frontal collision, the driver and passenger air bags will not deploy if the battery cable is severed in the accident. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
A solar collector with a surface area of 45 sq. ft. heats a flow of 1.2 gpm. What area would be needed to heat a flow of 2 gpm??
Fill in the blank(s) with the appropriate word(s).
How does a coil sensing tstat prevent frost on a medium temperature evaporator?
a. It has a narrow temperature swing to prevent frost buildup. b. It has a wide temperature swing to allow time to defrost. c. The tstat won’t start the compressor until the evaporator frost has melted. d. The tstat knows when to go into defrost.