NYC RMO EXAM, CHAPTER 11 (Centrifugal Water
Pumps) questions with verified answers
11.01.) An operator is running two centrifugal water pumps in parallel; one of the
pumps is operating at its maximum flow rate. If the operator throttles back on the
discharge valve of the second pump, which of the following will take place?
Ans✓✓-A reduction in both the water flow and pressure
11.02.) Which of the following valves should not be used to regulate flow?
Ans✓✓-Gate
11.03.) Which of the following will not cause a pump to cavitate? Ans✓✓-Air
entering through the pump seals
11.04.) When throttling down the discharge valve of a centrifugal type brine
pump, which of the following will occur? Ans✓✓-Brine flow goes down the HP
goes down
11.05.) Condensers and chilled water systems that incorporate more than one
pump are often assembled in a parallel piping arrangement. This configuration
makes it possible to adjust flow rates as the load on the system varies. Which
statement concerning a parallel pumping system is correct? Ans✓✓-All pumps
discharge into a common header
11.06.) A condenser water circulating pump is belt-driven by an electric motor
equipped with an adjustable pitch motor sheave. The main function of this type of
sheave is to? Ans✓✓-Permit adjustment of the pump's speed
Pumps) questions with verified answers
11.01.) An operator is running two centrifugal water pumps in parallel; one of the
pumps is operating at its maximum flow rate. If the operator throttles back on the
discharge valve of the second pump, which of the following will take place?
Ans✓✓-A reduction in both the water flow and pressure
11.02.) Which of the following valves should not be used to regulate flow?
Ans✓✓-Gate
11.03.) Which of the following will not cause a pump to cavitate? Ans✓✓-Air
entering through the pump seals
11.04.) When throttling down the discharge valve of a centrifugal type brine
pump, which of the following will occur? Ans✓✓-Brine flow goes down the HP
goes down
11.05.) Condensers and chilled water systems that incorporate more than one
pump are often assembled in a parallel piping arrangement. This configuration
makes it possible to adjust flow rates as the load on the system varies. Which
statement concerning a parallel pumping system is correct? Ans✓✓-All pumps
discharge into a common header
11.06.) A condenser water circulating pump is belt-driven by an electric motor
equipped with an adjustable pitch motor sheave. The main function of this type of
sheave is to? Ans✓✓-Permit adjustment of the pump's speed
