front 1 What is the name of the housing of a centrifugal pump that directs the flow of water to the pump discharge? | back 1 Volute |
front 2 Corrective and preventive are two types of maintenance. What is the third type? | back 2 Predictive |
front 3 What is the name of the valve placed on the bottom of the suction pipe of a groundwater well pump? | back 3 Foot valve |
front 4 These types of valves are used in pump suctions and are often the vertical lift disc design. | back 4 •Foot valves •Butterfly valves •1/4 turn plug valves •Gate valves |
front 5 Which valve listed below is primarily used as a flow control valve? | back 5 Butterfly valve |
front 6 Rope type packing glands in centrifugal pump stuffing boxes should
leak | back 6 One drip per second |
front 7 A piece of equipment has failed at a water plant and must be repaired. What should the maintenance person do first? | back 7 Read the O&M manual |
front 8 When this phenomena occurs, it sometimes is accompanied by loud
noises that sound like someone is pounding on the impeller with a
hammer, or the | back 8 Cavitation |
front 9 When a piece of equipment is locked out and tagged out (LO/TO), how many people hold a key to the lock used for LO/TO? | back 9 One, the person who locked it out |
front 10 What is a rule of thumb regarding the installation of rope packing into a centrifugal pump packing gland? | back 10 Never install new rings of packing on top of old packing |
front 11 What type of power is usually supplied at 120 volts, has three wires or leads, two of the leads carry 120 volts each, and the remaining lead is a neutral? | back 11 Single phase power |
front 12 Voltage unbalance between the three legs of power to a motor should not exceed what percent? | back 12 5% |
front 13 At least 75% of centrifugal pump problems can be traced to what? | back 13 The suction side of the pump |
front 14 OSHA standards require that all equipment that could unexpectedly start up or release stored energy must be what? | back 14 Locked out and tagged whenever it is worked on |
front 15 Mechanical seals installed on centrifugal pump shafts should leak how much? | back 15 Mechanical seals should NOT leak |
front 16 Stored energy in gas, air, water, steam and hydraulic systems must be what? | back 16 Bled of any stored energy |