The blowers of high-sidewall ductless indoor units _____
a. are usually propeller fans
b. use long, slender centrifugal blower wheels
c. use very short, large-diameter blower wheels
d. are often backwardly inclined
b
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Argillic horizons are characterized by ________
A) impervious hardpan layers B) organic matter accumulation C) accumulation of silicate clays D) high levels of iron and aluminum oxides E) high level of Na+ ions
Which of the following factors determine the synchronous speed of an AC motor?
A. inductance of the rotor windings B. the frequency of the applied voltage C. the number of field poles per phase D. the physical load driven by the motor E. both b and c
A pressure of 100 microns has been reached with the vacuum pump operating. The pump is turned off and the gauge reading rises to 5,000 microns and stays there. What does this indicate?
What will be an ideal response?
A geothermal system has a 6,875 sq. ft. horizontal heat exchang?e bed for its 2
ton heat pump. Find the ratio of sq. ft. of bed to ton of heat pump.
Fill in the blank(s) with the appropriate word(s).