Piping Expansion, Support and Insulation

Question 1

Insulating pipes that carry substances lower than the ambient air temperature, will prevent _____ on the pipe and consequent dripping and corrosion.

A) Discoloration
B) Water hammering
C) Evaporation
D) Expansion
E) Sweating

Answer 1

E) Sweating

Question 2

The constant support type of hanger:

A) Keeps the pipe pitched properly
B) Restricts the axial movement of the pipe
C) Maintains constant force on the pipe
D) Controls the horizontal movement of the pipe
E) Maintains a level pipe position

Answer 2

C) Maintains constant force on the pipe

Question 3

What are the desirable characteristics of an insulating material used to insulate piping?

1. High insulating value and long life
2. Vermin proof and easy to apply
3. Non corrosive and safe in terms of toxicity and carcinogenic properties
4. Able to retain its shape and insulating value when wet

A) 1, 2, 3, 4
B) 1, 2, 3
C) 2, 3, 4
D) 1, 3, 4
E) 1, 2, 4

Answer 3

A) 1, 2, 3, 4

Question 4

The ASME requirement for piping is:

A) B52.4
B) B21.8
C) B13.2
D) B31.1
E) B51.6

Answer 4

D) B31.1

Question 5

The main advantage of corrugated expansion joints is that they:

A) Rarely develop leaks
B) Can be used up to 5000 kPa
C) Require less space
D) Require less maintenance
E) Also act as a pipe support

Answer 5

C) Require less space

Question 6

Two types of adjustable overhead pipe hangers are:

A) Roller stand and constant support
B) Strap hangar and anchor chair
C) Roller hangar and roller stand
D) Anchor chair and strap
E) Roller hanger and strap hanger

Answer 6

E) Roller hanger and strap hanger

Question 7

The two types of expansion joints are the _____ and the slip expansion joint.

A) Bolted
B) Rotating
C) Bellows
D) Fixed
E) Stationary

Answer 7

C) Bellows

Question 8

A slip type expansion joint:

1. Allows more movement than a bellows type
2. Is actually a pipe within a pipe
3. Can have packing added in service
4. Has a lubrication fitting
5. Requires less space than the expansion bend

A) 1, 2, 5
B) 1, 2, 3, 4
C) 2, 3, 5
D) 1, 3, 4, 5
E) 1, 2, 3, 4, 5

Answer 8

E) 1, 2, 3, 4, 5

Question 9

The main purpose of installing insulation on pipe systems is to:

A) Give the pipe a neater appearance
B) Prevent heat transfer
C) Prevent injury to personnel due to contact with the bare surfaces of the pipe
D) Provide a paint surface
E) Prevent condensate from evaporating in the lines

Answer 9

B) Prevent heat transfer

Question 10

The pipe hanger system must be designed to carry the weight of the:

1. Pipe and insulation
2. Valves and fittings
3. A person climbing on it
4. Fluid contained within the pipe

A) 1, 2, 4
B) 1, 4
C) 2, 3, 4
D) 1, 2, 3, 4
E) 1, 2, 3

Answer 10

A) 1, 2, 4

Question 11

Correctly installed pipe hangers help to align the pipe, ensure a proper drainage slope, and:

A) Are attached to the floor
B) Are not adjustable
C) Require constant lubrication
D) Keep the pipe out of the way of foot traffic
E) Allow for axial pipe expansion

Answer 11

E) Allow for axial pipe expansion

Question 12

Which of the following insulating materials is best suited for low temperature applications?

A) Refractory fibre
B) Foamed plastic
C) Insulating cement
D) Glass fibre
E) Magnesia

Answer 12

B) Foamed plastic

Question 13

Expansion bends or joints are implemented in piping systems to:

A) Allow for expansion and contraction of the piping
B) Protect against water hammer damage
C) Reduce pipe costs
D) Give allowance for pressure increases
E) Allow for correct pipe drainage

Answer 13

A) Allow for expansion and contraction of the piping

Question 14

Which of the following is not a desirable characteristic for piping insulation?

A) Easy to apply
B) High insulating value
C) Safe to use
D) Vermin proof
E) A high thermal conductivity (k) value

Answer 14

E) A high thermal conductivity (k) value