A heat pipe heat exchanger _____.
a. transfers heat from one end of the exchanger to the other
b. is an active device that needs no electrical energy input
c. only operates if the supply and exhaust airstream temperatures are equal
d. decreases the dehumidification capacity of a system
a. transfers heat from one end of the exchanger to the other
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What type of oil pressure sensor is most commonly used on electronically managed diesel engines?
A. bourdon gauge B. variable capacitance C. electrical D. thermistor
According to the UN, an African country that historically provided 100 percent of the population's food needs now provides:
A. 50 percent B. 60 percent C. 70 percent D. 80 percent
When adjusting the drawbar on a tractor, what is the proper amount of ground clearance, measured from the
top of the drawbar? a. 5 to 12 inches b. 13 to 20 inches c. 25 to 30 inches d. 35 to 40 inches
Which of the following elements does not affect how a ladder logic program is developed?
A) The choice of XIC and XIO instructions for the PLC program. B) The requirement for current sinking or sourcing inputs and outputs. C) The contact type and active state of the input field devices. D) The type, direct or inverse acting, and active state of the output field devices.