ME3012FP Tut 4, 5, and 6

Refer to Fig. 1. Identify the stator of the internal screw pump

• M
• N
• P
• R

Refer to Fig. 2. Identify the type of screw pump.

• Single end construction single screw pump
• Single end construction double screw pump
• Double end construction single screw pump
• Double end construction double screw pump

What is fitted to the double screw pump to avoid metal contacts of the screws during operation?

• Bush
• Bearing
• Timing gear
• Mechanical seal

Which one of the following pumps has a connecting rod connected to its rotating element?

• Diaphragm pump
• Triple screw pump
• Double screw pump
• Internal screw pump

Which one of the following screw pumps uses the center rotor as its driving element?

• Triple screw pump
• Single screw pump
• Double screw pump
• External screw pump

Which one of the following types of fluid is suitable for a double screw pump to handle?

• Air
• Oil
• Sludge
• Water

Obstructions in the suction line of an internal screw pump can be cleared by

• dismantling the pump
• reversing the pump’s rotation
• increasing the pump pressure
• stopping the pump and flushing it

Refer to Fig. 8. Identify the type of screw pump

• Triple screw pump
• Single screw pump
• Double screw pump
• Internal screw pump

Which one of the following statements is correct for a triple screw pump?

• It has one left hand power rotor and two left hand idle rotors
• It has one right hand power rotor and two left hand idle rotors
• It has two left hand power rotors and one right hand idle rotor
• It has two right hand power rotors and one left hand idle rotor

Refer to Fig. 1. Identify the type of vacuum pump.

• Piston type
• Diaphragm type
• Rotary vane oil-less type
• Rotary vane lubricated type