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PSC1 Knowledge Quiz
Download the Formula Reference Sheet.
1. Which type of pump is depicted in the following image?
Internal gear pumpFlexible member (peristaltic) pumpProgressing cavity pumpTimed screw pump
2. What is the closest estimate of the total head, pump efficiency, NPSHR, and pump input power at a flow rate of 1000 GPM based on the following pump performance curve?
75 feet total head, 75% pump efficiency, 15 feet NPSHR, and 21 hp pump input power80 feet total head, 84% pump efficiency, 13 feet NPSHR, and 24 hp pump input power80 feet total head, 80% pump efficiency, 30 feet NPSHR, and 19 hp pump input power90 feet total head, 60% pump efficiency, 24 feet NPSHR, and 35 hp pump input power
3. What is the closest estimate of the flow rate and pump input power at a differential pressure of 100 psi, operating at 90% speed, based on given positive displacement pump curve?
Flow rate of 75 gpm and a pump input power of 5 hpFlow rate of 50 gpm and a pump input power of 4 hpFlow rate of 80 gpm and a pump input power of 6 hpFlow rate of 60 gpm and a pump input power of 4 hp
4. A system that is pumping a saline solution with a specific gravity of 1.036 (1034 kg/m³) requires a flow rate of 795 m³/hr (3500 gpm) and a total head of 80 m (262 ft). What would be the pump output power (or hydraulic power) required by the system assuming the pump is 85% efficient?

167 kW [224 hp]173kW [232 hp]179 kW [240 hp]188 kW [252 hp]
5. When the pump's impeller is located above the surface of the supply liquid, what type of installation is it?

Gravity feedSuction liftSuction headFlooded suction
6. What is the specific speed range for radial (centrifugal) pumps in US customary units?

Ns < 2500Ns < 45004500 < Ns < 10,000Ns > 10,000
7. The following is an example of which type of rotodynamic pump?
BB1 – Between bearing axially splitBB2 – Between bearing radially splitBB3 – Between bearing axially split multi-stageBB4 – Between bearing radially split multi-stage
8. Which rotary pump uses the reciprocating motion of a pumping element, assisted by a wobble plate, to increase the pressure of the supplied liquid?

Peristaltic pumpAxial piston pumpCircumferential piston pumpProgressing cavity pump
9. Which pump material designation features all the major wetted parts made of iron or carbon steel, with some internal components made of bronze?

Iron fitted pumpBronze fitted pumpAll bronze pumpCarbon steel pump
10. What type of shaft sealing method is shown in the following image?
Mechanical sealCompression packingGasket sealLabyrinth seal
11. Which of the following speeds would be representative of a four-pole electric motor operated with a frequency of 60 Hz?

3550 rpm2960 rpm1770 rpm1480 rpm
12. At what rotational speed should a positive displacement pump operate to produce 227 m³/hr (1000 gpm) if it is currently producing 341 m³/hr (1500 gpm) at 1775 rpm?

1000 rpm1184 rpm1275 rpm1485 rpm
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