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Friday, March 22, 2019

50 Interview Questions & Answers For Fire Fighting Engineering




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Q.1) What a sprinkler system in firefighting?
In a standard wet-pipe sprinkler system, each sprinkler activates independently when the predetermined heat level is reached. Thus only sprinklers near the fire will operate normally just one or two. This maximizes water pressure over the point of fire origin, and minimizes water damage to the building.

Q.2) What is a dry type sprinkler system?
Dry pipe fire sprinkler system. A dry pipe sprinkler system is one in which pipes are filled with pressurized air or nitrogen, rather than water. This air holds a remote valve, known as a dry pipe valve, in a closed position.

Q.3) What does it take to set off a fire sprinkler?
Each individual sprinkler head is triggered automatically when the air rising to the ceiling reaches a fire specific temperature of (red bulbs for buildings) 68 degree. Often, only one or two sprinklers are required to fully extinguish a building fire.

Q.4) What is a frangible bulb?
The frangible bulb is simple to use, comprising a small thermo bulb made of glass containing a chemical liquid that will expand rapidly when exposed to rising temperatures, bursting the glass fire bulb is and accurately pre-determined temperature, thereby activating the sprinkler.

Q.5) What is a pendant sprinkler head?
The upright, pendant sprinklers all produce a hemispherical water distribution pattern below the deflector. Sprinkler operation. During a fire conditions, the thermal-sensitive liquid in the glass bulb expands causing the bulb to shatter, releasing the button and Springfield assembly.

Q.6) What is NFPA 13?
NFPA 13 is an installation standard. It does not specify which buildings or structures require sprinkler protection. Rather, once sprinkler protection is required, it provides the requirement for the design and installation of this system.

Q.7) What is a fire hydrant system?
Fire hydrant pump systems (also known as fire pumps, hydrant boosters, fire water pumps) are high-pressure water pump designed to increase the firefighting capacity of a building by boosting the pressure in the hydrant service when mains is not enough, or when tank fed.

Q.8) What is the use of burn control valve in firefighting?
Zone Control Valve is a system designed to separate the area in case of maintenance and to get the indication of fire zone on a combination of Butterfly Valve, flow switch, Pressure Gauge and Test & Drain Valve.

Q.9) What is the fire alarm system?
A fire alarm system has a number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. … Alarms can be either motorized bells or wall mountable Sounders or horns.

Q.10) What is a flow switch in a sprinkler system?
Fire suppression. The Water Flow Switch is a mechanical-to-electrical Fire Alarm input device; it tells the fire alarm system that water is flowing in the sprinkler system.

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