Chilled water pipes should be _____.
a. kept above ambient temperature
b. painted to help prevent corrosion
c. insulated to prevent harm to personnel
d. insulated to help prevent condensation
d. insulated to help prevent condensation
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The greater the number of magnetic lines of force that are cut by a conductor per second, the greater the voltage that is induced in the conductor.
Answer the following statement true (T) or false (F)
List the six major shortcomings of coordinate tolerancing.
What will be an ideal response?
Calculate the following:
A dc, separately excited motor is used to hoist a constant-weight load. The motor is driven by a full-wave, ac/dc converter. The voltage on the ac side is 110 V (rms). The field constant of the motor K? is 3 Vs, and the armature resistance is 1 ?. The armature current is continuous under loaded conditions. When the triggering angle is 30o, the motor speed is 60 rpm. a. Load torque b. Load power c. Armature current when the triggering angle is adjusted to 45° d. Motor speed when the triggering angle is reduced to 30° and the field current is reduced by 10%
Gravity causes gases to exert force:
A) Downward and to the sides. B) In all directions. C) Downward. D) Gases do not exert force.