Form B - PEM

What is the term used to describe a situation where the level of the source of supply is located above the centre line of the pump?

• Suction lift.

• Suction head.

• Total static head.

• Total dynamic head.

The velocity of the fluid in a centrifugal pump is developed by the pump's

• casing.

• impeller.

• wearing rings.

• impeller shrouds.

To ensure a proper operation of a centrifugal pump, it must be primed

• after each trial run.

• after each operation.

• before each operation.

• before each overhauling.

Refer to Fig. 04. Identify the type of screw pump shown.

• Single screw pump.

• Double screw pump.

• Triple screw pump.

• Internal screw pump.

The air-operated diaphragm pump will stall when the

• air pressure is equal to the pump suction pressure.

• air pressure is equal to the pump discharge pressure.

• air pressure is higher than the pump suction pressure.

• air pressure is higher than the pump discharge pressure.

Refer to Fig.12. Identify the type of coupling shown.

• Spider coupling.

• Flange coupling.

• Universal coupling.

• Pin and rubber bush coupling.

Refer to Fig. Identify the method of coupling alignment shown?

• Reverse dial method.

• Rim and face method.

• Laser alignment method.

• Straight edge and feeler gauge method.

The accuracy of the laser shaft alignment method is up to

• 1/10 mm.

• 1/100 mm.

• 1/1000 mm.

• 1/10000 mm.

In vibration analysis, waveform is a graphical presentation of vibration amplitude as a function of

• time.

• order.

• degree.

• velocity.

The measurement of the distance moved by a vibrating object is known as

• Cycle.

• Phase.

• Frequency.

• Displacement.