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

MCQOPTIONS

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 closed position, when the door is not in use.
A.	Swing
B.	Revolving
C.	Rolling
D.	Collapsible
Answer» B. Revolving

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