Deck 10: Seals and Packing

Question 1

Which of the following seals should never be run when it is dry?

A) mechanical seal
C) packing seal
B) O-ring
D) radial lip seal

Answer 1

A

Question 2

Which of the following is not a part of a stuffing box seal?

A) the packing chamber
C) the packing rings
B) the packing slot
D) the stuffing glands

Answer 2

B

Question 3

The three types of seals are the packing seal, the radial lip seal, and the ____ seal.

A) O-ring
C) compression
B) mechanical
D) lantern ring

Answer 3

B

Question 4

When placing the packing rings in the stuffing box seal, the cuts on the rings must be ____ to avoid excessive leaking.

A) alternated
C) glued
B) spliced
D) closed

Question 5

What is a seal used for?

Question 6

An O-ring is referred to as what type of seal packing?

A) mechanical
C) squeeze
B) rubber
D) compression

Question 7

Which of the following is not a type of packing?

A) twisted fiber packing
C) braid-over-braid
B) square-braided packing
D) intertwisting

Question 8

What is commonly referred to as an oil seal?

A) O-ring
C) radial lip seal
B) packing seal
D) mechanical seal

Question 9

Compression packing is mostly made of various types of fibers. These fibers may include vegetable fibers, mineral fibers, animal fibers, and ____.

A) polycarbonate fibers
C) recycled fibers
B) cotton fibers
D) synthetic fibers

Question 10

When a packing material is covered with graphite, it is said to be ____.

A) lubricated
C) sealed
B) graphited
D) indestructible

Question 11

The ____ is a seal in which the rotating mating ring is internally mounted in the stuffing box.

A) outside seal
C) inside seal
B) O-ring
D) double seal

Question 12

Which of the following is not a type of radial lip seal?

A) pressed
C) cased
B) bonded
D) dual-element

Question 13

The ____ is a mechanical seal in which the rotating mating surface is mounted externally from the stuffing box.

A) radial lip seal
C) double seal
B) outside seal
D) inside seal

Question 14

A(n) ____ is basically two inside seals that are in a back-to-back orientation.

A) outside seal
C) double seal
B) packing seal
D) inside seal

Question 15

Which of the following types of packing is the strongest?

A) twisted braid
C) braid-over-braid
B) square braid
D) interlocking

Question 16

Of the seals that are listed, which will provide both retention and exclusion?

A) pressed radial lip seal
C) cased radial lip seal
B) bonded radial lip seal
D) dual-element radial lip seal