The chilled water system for a 25-story building has a pump located at ground level. the lost head in a vertical riser from the pump to an equipment room on the twenty-fifth floor is 30 ft (9 m) of water, and the pump produces 250 ft (76 m) of head. what is the pressure on the suction side of the pump for a pressure of 8 psig (55 kpa gage) to exist in the riser on the twentyfifth floor

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms