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161.

The inner surface of an arch is called

A.	extrados	B.	intrados
C.	crown	D.	voussoir

162.

The surface of the abutment on which the arch rests, is known as

A.	span	B.	keystone
C.	skew back	D.	crown

163.

The intermediate support of an arch is known as pier.

Right

Wrong

164.

The depth of arch is the

A.	vertical distance between the springing line and the highest point on the intrados	B.	vertical distance between the springing line and the highest point on the extrados
C.	perpendicular distance between the intrados and extrados	D.	horizontal distance between the supports

165.

The highest point on the extrados is called

A.	skew back	B.	crown
C.	voussoir	D.	keystone

166.

The vertical distance between the springing line and the highest point on the intrados is called

A.	depth	B.	rise
C.	haunch	D.	extrados

167.

Which of the following statement is wrong?

A.	The part of the wall on which the arch rests, is called abutment.	B.	Soffit is the under surface of an arch
C.	Crown is the highest point of the intrados	D.	all of the above

168.

The wedge shaped unit (voussoir) placed at the crown of an arch, is called

A.	skew back	B.	intrados
C.	extrados	D.	keystone

169.

The perpendicular distance between the intrados and extrados of an arch, is called

A.	pitch of an arch	B.	depth of an arch
C.	width of an arch	D.	thickness of an arch

170.

In rough brick arches, the joints at the extrados are wider than those at the intrados.

Correct

Incorrect