2.
Which size onwards NB of pipe is equal to OD of pipe?
3.
We generally cut threads on GI pipes by which method?
4.
How can flanges be classified based on face finish?
5.
What is Cloud marking in isometric indicates?
6.
Non-return valve also known as?
7.
Stainless steel is known as acid proof steel, what is the grade?
8.
What is the most commonly used material for Gasket?
10.
What is Maximum pressure rating of flange?
11.
Which type of 90 degree Elbow is generally used in piping
12.
By using following fitting we use to make branch joint at right angle with respect to main line is?
13.
Weld joint type of WNRF flange is?
14.
what is full form of IBR in piping?
15.
What is radius of short radius elbow?
16.
What is minimum distance maintained between two weld joints?
17.
Which is not a flange classification according to flange facing?
18.
In the following given options which is not a permanent wielding connection?
19.
Which of the following is used to block up the pipe on one end?
20.
Arithmetic Average Rough Height (AARH) is measurement for :
21.
Valve is used in a piping system for:
