A secondary power supply system for a fire detection and alarm system must be able to make the system fully operational within:
A. 10 seconds of the main power supply's failure.
B. 30 seconds of the main power supply's failure.
C. 60 seconds of the main power supply's failure.
D. 90 seconds of the main power supply's failure.
Answer: B. 30 seconds of the main power supply's failure.
Health Professions
You might also like to view...
The singular form for the medical term "bacteria" is:
A) bacteron. B) bacterium. C) bacteri. D) bacturia.
Health Professions
When moving a patient, keep feet _____________ to provide a wide base of support
A. well apart B. close together
Health Professions
Which modifier represents a decision for surgery?
a. -47 b. -22 c. -80 d. -57
Health Professions
A gray appearing image may be the result of using too much _________
Fill in the blank(s) with correct word
Health Professions