57.  The slope of the oultet of 'P trap' below the horizontal is kept
A. 8?
B. 10?
C. 12?
D. 14?.

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58. Anti-siphonage pipe is connected to
A. Main soil pipe
B. Bottom of P trap W.C.
C. Top of P trap W.C.
D. Side of water closet.

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59.  The value of 'C' of Indian type W.C. shown in Fig. 23.3 is
A. 400 mm
B. 450 mm
C. 500 mm
D. 550 mm.

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60. The value of 'A' of Indian type W.C. shown in Fig. 23.3 is :
A. 25 cm
B. 30 cm
C. 40 cm
D.( d) 45 cm.

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61. The value of`B' of Indian type W.C. shown in Fig. 23.3 is :
A. 45 cm
B. 50 cm
C. 30 cm
D. 25 cm.

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62. The height of the sink of wash basin above floor level is kept
A. 60 cm
B. 70 cm
C. 75 cm to 80 cm
D. 80 cm.

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63.  The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended
A. 100 mm
B. 150 mm
C. 200 mm
D. 175 mm.

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