Module I (160201)

Question 1

What constitutes the best seal on flanges?

Answer 1

Contact surface to contact surface on flat and smooth surfaces with enough force to hold them together and maintain a seal

Question 2

Name two reasons why gaskets move while in place

Answer 2

1. Bolt load
2. Internal Pressure

Question 3

Name some considerations for selecting a gasket

Answer 3

• flange finish
• flange face design
• temperature
• pressures
• medium to be sealed and fluid compatibility

Question 4

Name four types of blinds commonly found in industry

Answer 4

1. Pancake blind
2. Volute blind
3. Spectacle blind
4. Flange blind

Question 5

Which type of blind requires two gaskets while the system is in service?

Answer 5

Spectacle blind

Question 6

Name 5 common joint/flange faces found in industry

Answer 6

1. Flat face
2. Raised face
3. Tongue and groove
4. Male and female
5. Ring joint

Question 7

True or false: Flat-faced gasket joints are regarded as confined joints because the gasket is not allowed to flow freely

Answer 7

False: The gasket can be squeezed out

Question 8

Flat-face gaskets are used for high-pressure conditions

Answer 8

False: They would push out

Question 9

In regards to raised face gasket joints, what are the 2 dimensions of the face that are related directly to pressure?

Answer 9

1/16 inches for low pressures
1/4 inches for higher pressures

Question 10

A tongue and groove joint is considered a __________________ joint

Answer 10

totally confined

Question 11

How many flange bolts should be removed on spiral-wound gaskets in order to facilitate the gasket removal?

Answer 11

Half of them

Question 12

True or false: You cannot find metallic gaskets on engine heads?

Answer 12

False: They are commonly used for their strength

Question 13

Name the 3 common solid metal ring designs

Answer 13

1. delta
2. oval
3. octagonal

Question 14

The flanges that use solid metal ring gaskets are __________than the solid ring.

Answer 14

Harder

Question 15

On what is nominal pipe size based?

Answer 15

the inside diameter

Question 16

What is the main limitation of tapered thread joints in piping?

Answer 16

They loosen when vibration, pressure pulses or thermal movement are present

Question 17

What two things are under stress when piping is not properly aligned or supported before assembly?

Answer 17

1. pipes
2. components

Question 18

Which tool must you use to remove the burr from the inside of a pipe that you have just cut on a power vise?

Answer 18

A straight reamer

Question 19

Why is soldering more suitable than welding for joining thin metal parts?

Answer 19

Soldering creates much less distortion due to heat