107) The wall thickness of heavy gauge 20 mm size of conduit is :

108) The size of P.V.C. conduit pipe in diameter to be preferred for domestic wiring is :

109) While bending the conduit pipe, the minimum bending radius of conduit shall be :

110) While fixing the conduit pipes by saddles, the distance must be at either end of the fitting is :

111) The threads on the conduit pipe in all cases shall be between :