What type of certificate authenticates the identity of the user?
a. Digital.
b. Biometric.
c. Encryption.
d. E-mail signing.
Answer: a. Digital.
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What type of starter motor has electrical connections that allow current to pass through the field coils and the armature?
What will be an ideal response?
Why is integrated pest management better than traditional techniques that used pesticide sprays preventatively?
What will be an ideal response?
Solenoid valves are used as a pilot valve to control the flow ________
A) Into a remotely operated switch B) At a steady rate C) To a pneumatic-actuated valve D) Through the large-diameter pipe
How are the indoor sections of mini-split heat pump systems normally installed?
A) The indoor section is installed in an attic or basement and ducted to the conditioned space. B) They are mounted in a window with the refrigerant lines running out the back. C) A large hole must be cut in an outside wall and extra framing added to support the unit. D) They are mounted on the ceiling or hung on a wall.