Fire doors are released by a/an __________.
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Question 1 of 27070
5eccef9ebacbc34ba4d461c1
Fire doors are released by a/an __________.
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A
hydraulic directional valve that automatically releases the door in the event of a disruption to the control power system
B
spring-loaded catch that automatically lifts to release the door in the event of the presence of a fire
C
method that automatically releases the door in the event of a disruption of control system power
D
pneumatic heat sensor
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Question 1 of 27070
5eccef9ebacbc34ba4d461c1
Q
Fire doors are released by a/an __________.
A
hydraulic directional valve that automatically releases the door in the event of a disruption to the control power system
B
spring-loaded catch that automatically lifts to release the door in the event of the presence of a fire
C
method that automatically releases the door in the event of a disruption of control system power
D
pneumatic heat sensor
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