Industrial Systems and Pumping

What is the primary difference between positive displacement and non-positive displacement pumps?

• Operating temperature range
• Fluid viscosity requirements
• Fixed volume versus variable volume output
• Installation requirements

Which condition occurs when the liquid pressure drops below vapor pressure, causing vapor bubbles to form?

• Corrosion
• Cavitation
• Oxidation
• Precipitation

In pump systems, what does "head" refer to?

• The physical top of the pump
• The pressure expressed as height of fluid column
• The pump's intake point
• The maximum flow rate

What is the primary purpose of shaft alignment in rotating equipment?

• To increase power consumption
• To reduce vibration and wear
• To maximize noise output
• To decrease operational speed

Which type of coupling allows for minor misalignment while transferring rotary motion?

• Rigid coupling
• Chain coupling
• Flexible coupling
• Direct coupling

What is the main advantage of a positive displacement pump?

• Higher flow rates
• Lower maintenance requirements
• Consistent flow regardless of pressure
• Lower initial cost

When interpreting pump curves, what does the intersection of system curve and pump curve indicate?

• Maximum efficiency point
• Operating point
• Minimum flow rate
• Maximum pressure point

Which bearing type is best suited for handling both radial and thrust loads?

• Ball bearings
• Plain bearings
• Needle bearings
• Journal bearings

In belt drive systems, what happens to torque when speed is reduced?

• Torque remains constant
• Torque increases
• Torque decreases
• Torque becomes zero

What is the primary indicator of pump cavitation?

• Increased flow rate
• Higher efficiency
• Noise and vibration
• Smoother operation