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Fire > Heat Detectors > Flashcards

Heat Detectors Flashcards

1
Q

The most common type of heat detector is a(an):

  1. automatic sprinkler head.
  2. firecracker.
  3. optical fiber detector.
  4. rate compensated heat detector
A
  1. automatic sprinkler head.
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2
Q

A non-restorable, fixed temperature heat detector:

  1. is less sensitive than a restorable detector.
  2. can be substituted for a restorable heat detector.
  3. does not have to be inspected or tested.
  4. is most suited for high temperature applications
A
  1. can be substituted for a restorable heat detector.
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3
Q

Which of the following is NOT an advantage of a heat detector?

  1. Low installation costs.
  2. Low life cycle costs.
  3. Operate under varied environmental conditions.
  4. Provide early detection of small fires.
A
  1. Provide early detection of small fires.
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4
Q

A typical rate-of-rise heat detector actuates when the temperature changes ____________F (___________C) in 20 seconds.

  1. 5…2
  2. 10…5
  3. 15…7
  4. 20…11
A
  1. 5…2
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5
Q

A heat detector that operates at a fixed temperature as well as on a specific rise in temperature is a(an):

  1. thermistor cable.
  2. line-type detector.
  3. combination heat detector.
  4. optical fiber detector.
A
  1. combination heat detector.
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6
Q

The component of a heat detector that provides the rate-of-rise operation is the:

  1. solder bulb.
  2. vent opening.
  3. bi-metallic strip.
  4. spring.
A
  1. vent opening.
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7
Q

A heat detector that actuates when the temperature of the air surrounding the device reaches a predetermined level, regardless of the rate of temperature rise is a:

  1. rate-of-rise detector.
  2. thermistor detector.
  3. rate compensated detector.
  4. combination detector.
A
  1. rate compensated detector.
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8
Q

The fire detector that experiences the least thermal lag is the:

  1. rate-of-rise heat detector.
  2. combination detector.
  3. fixed temperature detector.
  4. rate compensated detector.
A
  1. rate compensated detector.
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9
Q

Which of the following is NOT a component of a rate compensated heat detector?

  1. Vent
  2. Outer metal case.
  3. Inner metal struts.
  4. Electrical contacts.
A
  1. Vent
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10
Q

A fire alarm initiating device that initiates an alarm signal when it detects an abnormally high temperature is a:

  1. rate-of-rise heat detector.
  2. fixed temperature heat detector.
  3. smoke detector.
  4. radiant energy fire detector.
A
  1. fixed temperature heat detector.
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11
Q

A heat detector that must be replaced after it has actuated is a:

  1. thermistor cable.
  2. restorable detector.
  3. non-restorable detector.
  4. eutectic salt detector
A
  1. non-restorable detector.
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12
Q

A heat detector that detects a fire along the length of a cable or tube is classified as a:

  1. spot-type detector.
  2. volume detector.
  3. restorable detector.
  4. line-type detector.
A
  1. line-type detector.
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13
Q

Which of the following is an advantage of a heat detector?

  1. Low life cycle costs.
  2. High sensitivity to small fires.
  3. Best detector for life safety applications.
  4. Sensitive to both heat and smoke.
A
  1. Low life cycle costs.
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14
Q

Which one of the following would be the best application for use of a heat detector?

  1. Flammable liquid storage room.
  2. Patient room in a hospital.
  3. Hallways of an apartment complex.
  4. Computer or control room.
A
  1. Flammable liquid storage room.
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15
Q

The temperature or rate-of-temperature rise that causes a heat detector to actuate is called the:

  1. sensitivity.
  2. thermistor point.
  3. set point.
  4. thermal lag.
A
  1. set point.
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16
Q

A heat detector that depends on a vent to the atmosphere that allows excess pressure within the detector to bleed out, preventing unwanted alarms when the detector is heated very slowly is a:

  1. rate-of-rise heat detector.
  2. fixed temperature heat detector.
  3. rate compensated heat detector.
  4. rate anticipation heat detector.
A
  1. rate-of-rise heat detector.
17
Q

A fixed temperature heat detector composed of an inner conductor and an outer conductive shell separated by a semiconductor material with conductivity that increases as the temperature increases is called a:

  1. Bi-metallic strip.
  2. eutectic salt detector.
  3. optical fiber detector.
  4. thermistor cable detector.
A
  1. thermistor cable detector.
18
Q

The difference between the temperature of a heat detector and the temperature of the air surrounding the heat detector is called:

  1. thermal lag.
  2. superheat.
  3. sensible heat.
  4. set point.
A
  1. thermal lag.
19
Q

Another name for rate compensated heat detector is:

  1. rate-of-rise
  2. rate anticipation.
  3. thermistor cable.
  4. semiconductor detector.
A
  1. rate anticipation.

Fire (13 decks)

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