What is a solenoid's duty cycle?
What will be an ideal response?
?It is the amount of time hat the signal is turned "on" compared to the amount of time hat the signal is turned "off." It is expressed in a percentage.
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A receiver is tuned to 1 GHz transmission and receives signals with Doppler frequencies ranging from 10 Hz to 50 Hz when moving at a speed of 80 km/hr. What is the fading rate?
What will be an ideal response?
The matric potential of soil water is ________
A) is generally higher than that of pure water outside the soil B) is lower in a sandy soil with 20 percent soil water than in a clay soil with same percentage of moisture C) influenced greatly by the content of salts in the soil D) not influenced appreciably by the force of gravity E) is little affected by soil solids
What is the advantage of balanced port TEVs?
A) Balanced port valves can retain good control over a wider range of operating conditions. B) Balanced port valves can be converted from externally equalized valves to internally equalized simply by capping the equalizer port. C) Balanced port valves equalize on the off cycle, making it easier for the compressor to start. D) Balanced port valves can be installed upside down.
Poorly maintained humidifiers can become indoor air quality concerns because of:
A) Mold and mildew growth. B) Unintended chemical reactions with HFC refrigerants. C) Increased static discharge around all electrical connections. D) Increased outgassing of volatile organic compounds.