CHIEF ENGINEER Unit 18 Q5

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Why might a light scatter type smoke detector be more sensitive to smaller smoke particles?

C) Because it can detect even minor scattering of light by small particles

A) Because it measures temperature

D) Because it measures obscured light

B) Because it detects ionized particles

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Which type of smoke detector uses a sensor to detect light scattered by smoke particles?

C) Obscuration type

B) Ionization type

A) Light scatter type

D) Thermal type

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How does an obscuration type smoke detector determine when to activate the alarm?

D) When the chamber fills with smoke

A) When the sensor detects a high enough temperature

C) When a set level of light reduction is reached

B) When the smoke particles completely block the light source

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In what environment is an obscuration type smoke detector most suitable?

D) Confined spaces without ventilation

A) Environments with frequent, dense smoke

C) Open spaces with high airflow

B) Areas where smoke is likely to be minimal

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How does an obscuration type smoke detector detect the presence of smoke?

A) By detecting particles through heat

D) By analyzing the sound waves in the chamber

B) By measuring the reduction in light transmission due to smoke

C) By measuring changes in air pressure

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What advantage does a light scatter type smoke detector have over an obscuration type in terms of early smoke detection?

D) It does not require a power source

B) It can detect small amounts of smoke more quickly

C) It is unaffected by dust in the environment

A) It can operate without a light source

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