501. 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.

502. 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.

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

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

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

506. Glazing of clay products, is done
A. to improve their appearance
B. to protect them from atmospheric effect
C. to protect them from corrosive action
D. all the above.

507. Generally wooden moulds are made from
A. ply wood
B. shisharn wood
C. deodar wood
D. teak wood

508. The-kiln which may work throughout the year, is
A. Clamp
B. Bull’s kiln
C. Hoffman’s kiln
D. none of these.

509. The lime which contains mainly calcium oxide and slacks with water, is
A. fat lime
B. quick lime
C. hydraulic lime
D. poor lime

510. The lime which contains high percentage of calcium oxide, is generally called
A. fat lime
B. rich lime
C. white lime
D. none of these.

NOTE
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