How does the technician know which way to install an air filter?
What will be an ideal response?
By paying attention to the directional arrow on the filter. The arrow points in the direction of airflow, which should be towards the unit.
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Repeat Problem 2–27, except that the design situation is failure by excessive deflection, and it is desired to minimize the weight.
What will be an ideal response?
Calculate the amount of heat required to change 5 pounds of 32° ice to water
A) No extra heat is required because the ice is already at the melting temperature. B) 5lbs × 32°F × 0.5 BTU/lb = 80 BTUs C) 5 lbs × 144 BTUs/lb = 720 BTUs D) The amount of heat required cannot be calculated without knowing the ending temperature of the water.
The difference between the minimum and the maximum operating points within that a control will function accurately is known as:
A) Spread. B) Differential. C) Setpoint. D) Range.
At _______, muscle contractions and breathing difficulty begin with loss of muscle control possible.
A. 0.010A to 0.030A B. 0.100A to 0.200A C. 2.0A to 4.0A D. None of these are correct