13) The rating factor which the normal current carrying capacity should be multiplied to get the permissible current in the cable for the circuits protected by close-excess current protection will be :

14) At what maximum distance do you fix saddles from a switch box, in a conduit wiring ?

15) Which one of the following materials is used to fix the screw on concrete wall and ceiling ?

16) You have to install cables for a switch board using clips on batten. The distance between the accessories is 3.6 m. How many clips do you need for horizontal run of the cable ?

17) In the metal conduit system of wiring where there is zig-zag wall projection the cables can be run using :