Water Distribution Modules 7 & 8 Questions With Complete Solutions

Water Distribution Modules 7 & 8 Questions With Complete
Solutions

_______ factor is the percent overload a motor can take for a
short time.
A. Rating
B. Duty
C. Service
D. Time Correct Answers C. Service

_______ meters accurately register low flow, but prematurely
wear under sustained high flow.
A. fire service
B. venturi
C. propeller
D. positive displacement Correct Answers D. positive
displacement

________ can be caused by a badly constructed pump and motor
base.
A. Bearing failure
B. High vibration
C. Shaft breakage
D. all listed Correct Answers D. all listed

________ hours or more nonstop is considered continuous duty
for a motor.
A. 4
B. 6
C. 8
D. 10 Correct Answers C. 8

, _______-sizing meters causes lost revenue due to inaccurate
reading of _____ flow.
A. Over / low
B. Under / low
C. Over / high
D. Under / high Correct Answers A. Over / low

_______-sizing meters causes pressure-loss problems and
inaccurate reading of _____ flow.
A. Over / low
B. Under / low
C. Over / high
D. Under / high Correct Answers D. Under / high

A four-pole motor operating on 60-cycle current has an
unloaded rpm of ________.
A. 3,600
B. 1,800
C. 1,200
D. 900 Correct Answers B. 1,800

A motor enclosure that cools by outside air using an external fan
or metal ducts is a/an _______ enclosure.
A. open, externally ventilated
B. weather-protected
C. open, pipe-ventilated
D. none listed Correct Answers A. open, externally ventilated