IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
Level transmitter- remote location
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Which of the following is an NEC® requirement for grounding and bonding?
a. The path to ground from circuits, equipment, and metal enclosures shall be continuous. b. The path to ground from circuits, equipment, and metal enclosures shall have sufficiently high impedance to facilitate the operation of protective devices. c. The path to ground from circuits, equipment, and metal enclosures shall rely on the earth as an effective ground fault current path. d. The path to ground from circuits, equipment, and metal enclosures shall be capable of safely carrying twice the maximum current of the system.
Which of the following is not true of permanent-magnet motors?
A. The main field flux is produced by permanent magnets. B. An electromagnet is used for the secondary field or armature flux. C. They has many of the characteristics of a wound rotor induction motor. D. They consist of permanent magnets mounted on a frame with a rotating armature placed between them.
What is the correct description of Charles' law?
A. There is a definite relationship between the pressure and volume of a gas if the temperature is kept constant. B. There is a definite relationship between the volume and temperature of a gas if the pressure is kept constant. C. The total pressure of a confined mixture of different gases is equal to the sum of the pressure of each gas in the mixture. D. Energy can be changed in form but cannot be created or destroyed.
How are vectors related to the Cartesian coordinate system?
What will be an ideal response?