Engine Fire Protection Systems Exam Questions With Complete Solutions (Updated)

Engine Fire Protection Systems Exam Questions With Complete Solutions (Updated) In a thermal switch type fire detection system, heat sensitive switches are placed in _______________ with each other, and in _______________ with the flight deck indicator lights. A. parallel; series B. series; parallel C. series; series - Answer- A Which of the following are features of an ideal fire detection system? 1. illuminates a light on the flight deck which indicates the location of the fire 2. sets off an audible alarm 3. low number or no false alarms 4. resettable when the fire is out 5. minimum electrical current requirements A. 1, 3, 5 B. 2, 3, 4, and 5 C. 1, 2, 3, 4, and 5 - Answer- C What is the operating principle of the spot detector sensor in a fire detection system? A. Resistant core material that prevents current flow at normal temperatures. B. fi conventional thermocouple that produces a current flow. C. A bimetallic thermal switch that closes when heated to a high temperature. - Answer- C Which of the following fire detection systems measure temperature rise compared to a reference temperature? A. thermocouple B. thermal switch C. lindberg continuous element - Answer- A Optical fire detection systems A. can be infrared or ultraviolet. B. must be used out of the way of direct sunlight. C. give a false alarm if not disarmed before an incandescent light strikes the sensor. - Answer- A A fire detection system operates on the principle of a buildup of gas pressure within a tube proportional to temperature. Which of the following systems does this statement define? A. kidde continuous-loop system B. lindberg continuous-element system C. thermal switch system - Answer- B What is the principle of operation of the continuous loop fire detection system sensor? A. fuse material which melts at high temperatures B. core resistance material which prevents current flow at normal temperatures C. a bimetallic thermo-switch which closes when heated to a high temperature - Answer- B Which of the following is the safest fire- extinguishing agent to use from a standpoint of toxicity and corrosion hazards? A. dibromodiflouromethane (Halon 1202) B. bromochlorodiflouromethane (Halon 1211) C. bromotriflouromethane (Halon 1301) - Answer- C How is the fire extinguishing agent distributed in the engine section? A. spray nozzles and fluid pump B. nitrogen pressure and slinger rings C. spray nozzles and perforated tubing - Answer- C In a fixed fire-extinguishing system, there are two small lines running from the system and exiting overboard. The line exit ports are covered with a blowout type indicator disc. Which of the following statements is true? A. When the red indicator is missing, it indicates the fire- extinguishing system has been normally discharged. B. When the yellow indicator disc is missing, it indicates the fire-extinguishing system has been normally discharged. C. When the green indicator disc is missing, it indicates the fire-extinguishing system has had a thermal discharge. - Answer- B A common visual check of fire detection elements includes A. the contact points in the control box. B. cracked or broken sections. C. the color of missing blowout disks. - Answer- B If a continuous-loop fire detection system is giving a false alarm, how can it be determined if the problem is in the control unit or in the sensing loop? A. by disconnecting the loop from the control box and observing if the false alarm stops B. by connecting a voltmeter across the connected loop terminals C. by resetting the warning lights and timing the interval until the next false alarm - Answer- A