Security Engineering/Site and Facility Security. After reading this week’s materials, please respond to one or more of the following questions. 1. Identify the malicious threat sources to physical security and their corresponding countermeasures. 2. What is a “man-trap”? What is the difference between “fail-safe” and “fail-secure” configurations in how doorways with automatic locks operate? 3. Define the following different types of voltage fluctuations possible with electric power: spike, surge, fault, blackout, sag/dip, brownout, and in-rush current. Describe electromagnetic interference (EMI) and radio frequency interference (RFI) and discuss sources of each. 4. Describe the four main classes of fire in relation to the type of fire, elements of fire they are associated with, and the suppression method used to mitigate them. List the four main combustion elements and the appropriate and align them with the appropriate suppression method. 5. Describe the differences between the four main types of water sprinkler systems used for fire suppression.

    Assurance Engineering/Site and Facility Assurance

    Question 2: Man-Trap, Fail-Safe and Fail-Secure

    A “Man-Trap” is usually a diminutive capacity that has an egress situated in individual cebearance and an minute from the other. The agencys of a “Man-Room” is such that individual of the doors cannot be discloseded original the other has been close and locked (Mo et al. 2012). This mark of assurance technique is used to disjoined guard areas from unsecured areas to circumscribe vestibule to the guard areas quenchedside pointed example to vestibule. Such technology is life applied with interlocking doors where they are interfaced in a scheme contrivance in which were when individual door unlocks; the other automatically gets close. The influential dissent betwixt `failsafe’ and `fail-secure’ is that the failsafe arrangement insist-upons additional life to be applied on to the tangible assurance scheme ce the scheme to dwell. Life removal or a life quenchedage is the barely protocol that can execute the assurance scheme ceaminous. On the other artisan, fail-guard arrangements insist-upon that life is gratefully applied on the assurance scheme to it to dwell disclosed.

    Question 5: Marks of Affection Sprinkler Schemes

    Installing protective measures resisting affection and fume in a retail fabric is compulsory. Nevertheless, it’s influential to deliberate the sprinkler schemes in subject of an clear. Sprinkler schemes include; the pre-action scheme, where the sprinkler schemes are saturated with insinuate and enthusiasm, insinuate is allowed to glide upon exposure of the affection (Grant. Et al. 200).Dry pipe schemes used compressed enthusiasm so that the pressurized enthusiasm escapes anteriorly their insinuate can spring quenched. It is fanciful ce clears where the temperatures are reduced which where pipes won’t congelate. It is too uncostly to conceal and fruitful in agency. On the other artisan, there are the Wet pipe schemes that are abundantly love the pre-action scheme, save the scheme is regularly filled with insinuate which allows ce fleet reaction. The redundance scheme uses fume and affection detectors right love the other schemes save has nozzles that can be used to channel straightforward jets whenever there is an clear.


    Grant, G., Brenton, J., & Drysdale, D. (2000). Affection reservation by insinuate sprays. Progress in life and incendiarism comprehension, 26(2), 79-130.

    Mo, Y., Kim, T. H. J., Brancik, K., Dickinson, D., Lee, H., Perrig, A., & Sinopoli, B. (2012). Cyber-tangible assurance of a clever grid infrastructure. Proceedings of the IEEE, 100(1), 195-209.