MAM I Centri Pump

Lantern ring is provided in the stuffing box to

• provide cooling for the gland

• provide heating for the gland

• to prevent the leakage

• All are correct

What are the components of mechanical seal?

• Rotating seal element

• Stationary seal element

• Spring

• All are correct

Relief valve is not provided in the positive displacement pump because ____

• it does not increase the pressure positively

• protection of pump is not important

• protection of valve is not important

• All are wrong

In the volute casing, the flow area ____ at the outlet.

• increases

• reduces

• remains constant

• all are wrong

____ is provided near the center of the impeller to equalize the pressure and avoid the imbalance of the impeller.

• Balancing pin

• Balancing holes

• Balancing vanes

• All are correct

The pump sleeve shall be sealed at one end.

• False

• True

What is the normal clearance of the wear rings?

• 1/100 of impeller dia

• 1/1000 of casing dia

• 1/100 of casing dia

• 1/1000 of impeller dia