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RS- (a) What constituents render brick-earth unsuitable for manufacturing bricks?
(b) How does excess of each of the constituents of brick-earth affect the quality of bricks? - Differentiate between
(a) Perforated and hollow bricks.
(b) Acid refractory and basic refractory bricks.
(c) Over-burnt and under-burnt bricks.
(d) Earthenware and stoneware.
(e) Slop-moulded and sand-moulded bricks. - (a) Describe the tests performed to check the quality of bricks.
(b) What do you understand by glazing? How is it done? - Write short notes on:
(a) Clay Jallis (b) Defects in bricks
(c) Clamp burning of bricks (d) Glazing
(e) Efflorescence (f) Heavy duty bricks - (a) What is a frog? State its importance in clay bricks.
(b) What are the characteristics of good bricks? - Describe briefly the tests to which bricks may be put before using them for engineering
purposes. - What is efflorescence in bricks? What are its causes and remedies?
- (a) What are fire clays? State there constituents and importance.
(b) Describe the process of manufacturing clay tiles. - Write short notes on:
(a) Refractory bricks (b) Earthenware
(c) Majolica (d) Over-burnt bricks.
(e) Ceiling tiles (f) Testing of tiles - Sketch and state the uses of:
(a) Coping brick (b) Bull nose brick
(c) Perforated brick (d) Cornice brick
(e) Hollow brick (f) Queen closer - Write short notes on:
(a) Paving bricks (b) Roofing tiles
(c) Terracotta (d) Faience
(e) Porcelain (f) Warpage test of bricks
(g) Majolica (h) Testing of tiles
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- Consider the following statements:
A good soil for making bricks should contain
(1) about 30% alumina
(2) about 10% lime nodules
(3) a small quantity of iron oxides
(4) about 15% magnesia
Of these statements
(a) 1 and 2 are correct (b) 1 and 3 are corect
(c) 1, 3 and 4 are correct (d) 2, 3 and 4 are correct