PSAP Test Your Knowledge

Test Your Knowledge

Are you Pump System Certification (PSAP) Ready?
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PSAP Knowledge Quiz
Download the Formula Reference Sheet.
1.What is the estimated pump efficiency of a flooded suction pump, that is pumping water at 68 °F (20 °C) using the following field measured conditions?
- Current 71.1 Amps average for three phases;
- Voltage 482 V average for three phases;
- Power factor 0.9;
- Flow rate 2500 gpm (568 m³/h);
- Suction pressure 2.8 psi (19.3 kPa);
- Discharge pressure 29.9 psi (206 kPa);
- Motor efficiency 93%;
- VFD efficiency 97%;
- Suction pipe diameter at pressure measurment 12 in (305 mm);
- Discharge pipe diameter at pressure measurment 10 in (254 mm);
- Suction gauge elevation above datum 3.3 ft (1 m),
- Suction gauge elevation above datum 6.6 ft (2 m);
- Assume head losses between pressure gauges and pump are negligible.
A.) 56%C.) 72%B.) 65%D.) 74%
2. What is the NPSHA for a rotodynamic pump operating in a closed system with the following related conditions:
- Liquid level above pump centerline (Impeller datum) 15ft (4.6 m);
- Suction vessel pressure at top of liquid level 10 psia (69 kPa,a);
- Head loss between suction vessel and pump suction flange 2.0 ft (0.6 m);
- Liquid vapor pressure 5.4 psia (37.2 kPa,a);
- Atmospheric pressure 14.7 psia (101 kPa,a);
- Liquid specific gravity 0.8;
- Suction pipe velocity entering pump 10 ft/s (3.05 m/s);
- Pump flow rate 2500 gpm (568 m³/h);
- Discharge pressure 50 psig (345 kPa)
A.) 21.3 ft (6.5 m)C.) 26.3 ft (8.0 m)B.) 23.3 ft (7.1 m)D.) 57.5 ft (17.5 m)
A.) Globe valve.C.) Gate valve.B.) Butterfly valve.D.) Ball valve.
A.) Block flow diagramB.) Process flow diagramC.) Piping and instrumentation diagramD.) Isometric diagram
A.) Prescreening of all the pumps in a unit to identify systems that should be evaluated furtherB.) Desk audit that reviews the application requirements, duty points, pump design, performance curves, and system drawings and designC.) Measuring pump and system data for steady operating conditionsD.) Measuring pump and system data for variable operating conditions
A.) 1620 RPM - 1980 RPMC.) 2710 RPM - 3075 RPMB.) 2310 RPM - 2650 RPMD.) 3240 RPM - 3850 RPM
A.) Flow rateC.) Pump input powerB.) Differential pressureD.) Vibration Fast Fourier Transform
8. For a field measured system curve that has 100 ft (30.5 m) of static head and 100 ft (30.5 m) of head loss due to major and minor pipe and fitting losses at a flow rate of 2500 gpm (568 m³/h), what will the system head requirement be if the flow rate is increased to 5000 gpm (1135 m³/h)and the water level suppling the pump decreases by 10 ft (3 m), and everything else remains constant?
A.) 190 ft (58 m)C.) 490 ft (149 m)B.) 210 ft (64 m)D.) 510 ft (155 m)
9. For a pipeline pump handling jet fuel with specific gravity 0.82 and operating at 1000 gpm (227 m³/h), 2000 ft (610 m) with a overall efficiency of 83%, what is the specific energy consumption?
A.) 0.0062 kW·h/gal (1.6 kW·h/m^3)C.) 0.011 kW·h/gal (3.0 kW·h/m^3)B.) 0.0093 kW·h/gal (2.5 kW·h/m^3)D.) 0.018 kW·h/gal (4.9 kW·h/m^3)
10. For the measurements below, what is the total head for a centrifugal pump?
- Flow rate is 700 gpm (160 m³/h),
- Suction (inlet) pressure is 100 psig (690 kPa)
- Suction pipe velocity at pressure measurement 5.7 ft/s (1.8 m/s)
- Discharge (outlet) pressure is 250 psig (1725 kPa)
- Discharge pipe velocity at pressure measurement 16 ft/s (4.9 m/s)
- Gauge locations are two pipe diameters before the inlet and two pipe diameters after the outlet
- Gauges are at the same elevation
- Fluid specific gravity is 0.8 (800 kg/m³)
- Atmospheric pressure is 14.5 psi (100 kPa)
- Acceleration due to gravity is 32.2 ft/s² (9.81 m/s²)
A.) 348 ft (106 m)C.) 436 ft (133 m)B.) 422 ft (129 m)D.) 451 ft (137 m)
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PSAP Knowledge Quiz