NICET PRACTICE FIRE ALARM SYSTEMS LEVEL II LESSON . QUESTIONS WITH CORRECT AND VERIFIED ANSWERS. A+ GRADED.

NICET PRACTICE FIRE ALARM SYSTEMS LEVEL II LESSON . QUESTIONS WITH CORRECT AND VERIFIED ANSWERS. A+ GRADED. What are the three sides of the fire triangle? Select one ANSWER>> a. Flames, radiant rgy, ene e smok b. Heat, smoke, flame s c. Oxygen, fuel, ignition sourc e d. Oxygen, fuel, radiant energy - c Which of the following is not a product of combustion? Select one ANSWER>> a. Hea t b. Pyrolysi s c. Radiant e nergy d. Smoke - b Heat is produced when materials ? react to form simpler compounds. Select one ANSWER>> a. y endothermicall b. exothermicall y c. y intrathermicall d. introthermically - b Smoke particles are usually about what size? Select one ANSWER>> a. Between 0.01 microns to about 5,000 microns b. Between 0.1 microns to about 4,000 microns c. Between 1 micron to about 4,000 microns d. Between 1 micron to about 5,000 microns - a What kind of detector is most appropriate for an elevator lobby in an apartment building? Smoke detectors undergoing UL testing must actuate between ? per foo t obscuration . Select one ANSWER>> c. 0.5 - % 3.5 Incorrect d. 0.5 - % 4.4 Correct - d A condition where a burning fuel produces smoke without flames is known as ? . Select one ANSWER>> a. n deflagratio b. oxidatio n c. pyrolysi s d. radiation Feedback - c During the UL tests, system - powered smoke detectors must respond to a polystyrene fire within ? . Select one ANSWER>> a. 1 minute b. 2 minutes c. 3 minutes d. 4 minutes - b a. 0.4 - 4.4 % Incorrect b. 0.4 - % 5.5 Incorrect Select one ANSWER>> a. Air-sampling smoke detector b. Heat detector c. Radiant energy-sensing fire detector d. Spot-type smoke detector - d