ABSA :4A UNIT 7 Questions with Complete Solutions.

ABSA :4A UNIT 7 Questions with
Complete Solutions.
One disadvantage of using threaded connections to join pipes and fittings is that it:



Select one:

a. Is more costly

b. Weakens the pipe

c. Difficult to insulate

d. Requires the services of a pipe fitter - Answer b. Weakens the pipe



With respect to NPS 14 pipe and larger, the Nominal Pipe Size number is referring to the:



Select one:

a. Outside diameter

b. Inside diameter

c. Thickness

d. Mass per metre of length - Answer a. Outside diameter



Two types of expansion joints are the _________ designs.



Select one:

a. Bolted and threaded

b. Flex bend and raised face

c. Ring joint and slip

d. Bellows and slip - Answer d. Bellows and slip



A good rule of thumb is to install pipe hangers at ___________ intervals along a pipe.



Select one:

a. 1 m

b. 1.5 m

c. 3 m

d. 5 m - Answer c. 3 m

, In most sizes of pipe, Schedule 40 corresponds to _____ wall thickness.



Select one:

a. Welded only

b. Threaded only

c. Extra strong (XS)

d. Standard - Answer d. Standard



Which two systems are used to designate nominal pipe size?



a. USCS uses NPS, and SI assigns a DN

b. Nominal inside diameter and actual outside diameter

c. Schedule numbers and nominal size

d. SI uses NPS and USCS assigns a DN - Answer a. USCS uses NPS, and SI assigns a DN



With respect to NPS 14 pipe and larger, as the pipe schedule increases, the outside diameter:



Select one:

a. Dependent on the material selected

b. Remains the same

c. Decreases

d. Will be equal to the schedule number - Answer b. Remains the same



A common material used for water and instrument air piping in power plants is



Select one:

a. galvanized steel

b. cast iron

c. bronze

d. copper - Answer d. copper



The three markings mandatory on valves to be used in pressure piping include manufacturer's
name, material designation and _______________.



Select one: