36. Jbumb bricks are
A. under burnt
B. over burnt
C. kutcha
D. none of these.

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37. The portion of the brick cut across its width and having its length equal to that of a full brick, is known as
A. closer
B. queen closer
C. king closer
D. prince closer

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38. The portion of the brick without a triangular corner equal to half the width and half the length, is called
A. closer
B. queen closer
C. king closer
D. squint brick.

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39. The portion of a brick cut to form angles other than right angles in plan, is known as
A. queen closer
B. king closer
C. closer
D. squint brick.

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40. Refractory bricks resist
A. high temperature
B. chemical action
C. dampness
D. all the above.

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41. Refractory bricks are used for
A. retaining walls
B. columns
C. piers
D. combustion chambers.

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42. The fire clay contains pure
A. lime
B. oxide of iron
C. hydrated aluminium silicate
D. magnesium.

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