PO60 SEMIFINAL

Question 1

Fire detection system primary purpose?

Answer 1

To detect

Question 2

Two categories of engine fire detection?

Answer 2

1. Spot detection

2. Continuous loop

Question 3

In a —— individual fire detectors, or switches, detect a fire. A fire warning sounds only when a fire exists in the same location as a detector

Answer 3

Spot detection

Question 4

The —— uses a single switch in the form of a long tube to detect fire.

Answer 4

Continuous loop

Question 5

When you depress the single loop test switch the warning light does not illuminate and or the warning horn does not sound. What are the possible faults?

Answer 5

1. Open in test circuit.
2. Open in warning light/horn circuit
3. Open in the fire loop
4. Faulty relat or relay ground
5. Faulty lamp or ground
6. Faulty test switch

Question 6

The fenwal continuous loop type system that consists of

Answer 6

Single fire detection element (overheat)

Question 7

What happens when a fire or overheat condition occurs in the fenwal continuous loop system?

Answer 7

The electric core resistance drops and current flows to ground and the alarm circuit is energized

Question 8

The kidde continuous loop system consists if a single overheat sensing element that…

Answer 8

Has twonwire conductors + thermistor material

Question 9

3 primary pneumatic continuous loop detector systems?

Answer 9

1. Lindberg
2. Systron Donner
3. Meggit

Question 10

What happens in the lindberg continuous loop system when the gas absorbing material is heated?

Answer 10

Release gas and mechanically actuated the switch

Question 11

What type of fire detection system uses a photoelectric sensor to measure the amount of visable light or infrared radiation in an enclosed area?

Answer 11

Flame detector