When using a sensing pilot device to directly control the operation of a motor, you must make sure that the type of pilot device is equipped with contacts that can handle the rated current of the motor. These devices are generally referred to as "____________________" devices.
Fill in the blank(s) with the appropriate word(s).
line voltage
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A multi-zone constant volume system is well-suited for buildings in which _____.
a. the control zones are likely to be rearranged regularly b. the control zone arrangement is permanent c. the zones are very small d. cooling and heating are required at the same time in the same zone
Diametric projection is similar to isometric projection, but instead of one axis forming an equal angle with the plane of projection, two axes form equal angles.
Answer the following statement true (T) or false (F)
Which of the following is the common serial data connection for computer modems and the mouse interface?
A. RS-232 B. RS-422 C. RS-449 D. RS-485
In a capacitive AC circuit, the relationship between current and voltage is described as ____ degrees out of phase.
A. 30 B. 60 C. 90 D. 180