A.Less than or equal to -0,1 in water column (-25 Pa)

B.More than +3in wc (>746Pa),but less than or equaltto+6,in wc(1492 pa))

C.Less Than -4,+4 inches water column(-1000 opa ,+100 <pa>)

D.More than -0,005 in wc (< -1,24 Pa), but less than or equal to +0,05in wc (+12,4 Pa)

A.removes maintenance item, removes a source of heat, allows P D U to occupy less expensive space

B.increases cooling efficiency, eliminates fire hazard, minimizes noise pollution

C.lowers electricity costs, improves network speed, enhances security measures

D.reduces cable congestion, prevents water damage, provides better access points

A.50%

B.45%

C.55%

D.60%

A.Single bus is more flexible and adaptable to changing needs than dual bus

B.Single bus is more reliable than dual bus

C.Single bus has only one power source while dual bus has two independent power sources

D.Dual bus is more cost-effective than single bus

A.Two balanced feeds with different voltages derived from a single distribution station

B.At least two circuits from one substation fed via alternative power grid

C.One circuit from one substation, separate paths

D.At least four circuits each from different distribution stations but fed via common feeders