The UL requires that system controls affecting fire alarm operation be protected by a(n) _____.
a. lock
b. password
c. RFID card reader
d. thumbprint scanner
a. lock
Trades & Technology
You might also like to view...
The solid-state relay uses a solid-state component called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
Trades & Technology
A diaphragm clutch uses ________.
A) 12 strong coil springs B) Three wide release levers C) Both A and B D) Neither A nor B
Trades & Technology
Las dobladoras hidráulicas pueden curvar tuberías rígidas de hasta _____ de diámetro.
a. 2-1/2" (6,35 cm) b. 3" (7,62 cm) c. 4" (10,16 cm) d. 6" (15,24 cm)
Trades & Technology
Which device illuminates a different color when connected to power or ground sides of a circuit?
A) Jumper wire fuse B) Test light C) Logic probe D) None of these
Trades & Technology