A _________ door is provided with special Hinges known as the double a – McqOptions

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1.	A _________ door is provided with special Hinges known as the double action spring Hinges and thus the shutters of the door are held in a closed position when the door is not in use.
A.	Swing
B.	Revolving
C.	Rolling
D.	Collapsible
Answer» B. Revolving

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