Download Alarm and Smoke Alarm Systems: Q&A for Electrical Engineering and more Exams Safety and Fire Engineering in PDF only on Docsity!
Alarm Systems and Smoke Alarms
questions and 100% accurate answers
What code or standard mandates the locations for devices forming part of a fire alarm system? a) The Canadian Electrical Code b) The National Building Code - Alberta Edition c) The National Fire Code - Alberta Edition d) The Alberta Electrical STANDATA - answ✔✔b) The National Building Code - Alberta Edition The magnetic reed switch is unaffected by moisture and arcing. a) true b) false - answ✔✔a) true The main advantage of roller ball contacts is they are much more reliable than magnetic reed switches. a) true b) false - answ✔✔b) false
Examples of intrusion sensing devices would include: a) magnetic reed switches, glass break detectors and sirens b) motion detectors, CPU and roller ball contacts c) shock sensors, window screen protection and motion detectors d) all of the above - answ✔✔c) shock sensors, window screen protection and motion detectors Surface mounting is the most suitable form of installation for the magnetic reed switch. a) true b) false - answ✔✔b) falseWhat are the two divisions of intrusion- sensing devices? - answ✔✔Perimeter and Internal A good example of a perimeter device is a passive infrared detector. a) true b) false - answ✔✔b) false Reed switches are used more widely and frequently for additional applications than roller ball contacts.
d) central processing unit - answ✔✔d) central processing unit If the power goes out, a CPU is unable to function. a) true b) false - answ✔✔b) false: the battery back-up supplies the power CPUs can have built in modems. a) true b) false - answ✔✔a) true The CPU does not have adjustable time delay settings for zones. a) true b) false - answ✔✔b) false: the installer may program any zone for delay Sirens should never be installed in cold air return ducts. a) true
b) false - answ✔✔b) false: cold air returns are an excellent place to install a siren as it gives good resonating sound and is inaccessible to burglars When operating properly, a zone circuit using end of the line resistors sends an alarm if it has been disconnected for cut. a) true b) false - answ✔✔b) false: the panel sends a trouble signal to the keypad (or monitoring station), not an alarm signal It is necessary to install smoke alarms in every bedroom. a) true b) false - answ✔✔a) true It is permissible to install a smoke alarm in a circuit that is controlled by a disconnect switch. a) true b) false - answ✔✔b) false: cannot be switched (32-200 1) A smoke alarm must be installed on its own circuit.
Where is a shock sensor generally mounted? a) on the window frame b) on the screen c) on the window rim d) on the glass pane - answ✔✔d) on the glass pane What is the most common cause of false alarms in residential alarm systems? a) pets b) improper installation c) power outages d) battery failures - answ✔✔b) improper installation What organization sets the standards for smoke alarms in Canada? a) The Canadian Electrical Code b) The National Building Code c) Underwriters Laboratory d) Canadian Standards Association - answ✔✔C) Underwriters Laboratory
How many smoke alarms are required on the storey of a new dwelling that contains three bedrooms and a common hallway? a) one b) two c) three d) four - answ✔✔d) four Residential alarm systems are considered to be ___________________ circuits. a) category 1 b) category 2 c) class 1 d) class 2 - answ✔✔d) class 2 The back-up power battery in a smoke alarm must be able to maintain a normal condition for at least: a) seven days b) ten days c) fourteen days
c) a rapid change in air pressure which closes a set of contacts d) sensing a rock hitting the window causing vibration and initiating an alarm - answ✔✔c) a rapid change in air pressure which closes a set of contacts It is a good idea to mount the CPU of a residential alarm system at or near the entrance of the residence it is protecting for maintenance purposes. a) true b) false - answ✔✔b) false In a monitored loop, if an intruder were to cut the wiring to a sensing device, there would be no way of knowing. a) true b) false - answ✔✔b) false In many alarm systems it is possible to arm the perimeter devices and not the internal devices, to protect the occupants of the home. a) true b) false - answ✔✔a) true
Signaling devices such as sirens and strobe lights should be installed in an attic space or return air duct. a) true b) false - answ✔✔b) false On a call to a residence where the CPU is giving a trouble signal on a monitored loop system, a likely cause may be: a) a broken wire in the sensing loop b) a faulty end of line resistor c) a loose splice in the sensing loop d) all of the above - answ✔✔d) all of the above Most fire deaths are caused by smoke inhalation. a) true b) false - answ✔✔a) true A smoke alarm used in a home is an example of an early warning device.
A) true b) false - answ✔✔b) false A smoke alarm has its own source of power and functions as an initiating device as well as a signaling mechanism. a) true b) false - answ✔✔a) true Which of the following could be considered perimeter devices in a residential alarm system? a) Glass break detector b) PIR detector c) magnetic reed switches d) all of the above e) only A and C above - answ✔✔e) only A and C above
