$3.)$ State whether the following statement is True $($T$)$ or False $($F$),$ if it is false explain why. $(6$ Marks$)$

$1-$ Supplying water at high temperature will allow the use of low$-$grade heat sources. $[]$

$2-$ Instantaneous and semi$-$instantaneous water heaters: are sized only on the maximum peak flow rate. $[]$

$3-$ Upfeed risers must be valved at the top level of the building with shut off and drain valve. $[]$

$4-$ Pressure Reducing Valves are used to avoid unacceptable high system pressure loads at light conditions. $[]$

$5-$ Minimum requirements for a wheelchair turning space in toilets is $40$ inch. $[]$

$6-$ All water closets, bidets, and urinals are manufactured with traps $($integrated trap$).$

$4.)$ What you will use in following scenarios? and why? $(3$ Marks$)$

$1-$ When backflow happens in a pump at the time it is off.

$2-$ A very loud banging, knocking or hammering noise in the pipes when flow is suddenly off.

$3-$ You require to choose water feed system $($e$.$g$.$ down feed system$)$ for a building where the main supply is only enough for lower levels and the roof have no space for the water tank with enough capacity for the whole building.