CBT Tanveer

Cbt exam piping
1 What is percentage of chloride content concentration in water for SS material?
Answer: (Less than 50 PPM)
2 Who is the responsible to provide the material and workmanship.
Answer: Manufactures
3 Leak Test
Answer: Tightness of the flanged joint and threaded joints
4 Blind Flange Formula
Answer: Tm=t+c
5 what is the root gap of header size Is 24 inch and branch size is 12mm.
Answer: As per WPS
6 what is the standard for factory made wrought butt weld fittings?
Answer: B 16.9
7 Owner inspector does not match the below given
(A) AWS + 5 years’ Experience (B) C SWIP + 5 years’ Experience
(C) CWIP+ 5 years’ Experience (C) 5 years’ Experience IN Design
8 Standard for Steel bonnet gate valve
Answer: API 600
9 Bending distance for circumference weld
Answer: 600 mm
10 What is standard for gate valve 4 inch
Answer: API 602
11 Threading fitting standard

Answer: B 16.11
12 2G,5G position qualified welder qualification range
Answer: ALL
13 What is the strength test pressure
Answer: To check the integrity of piping system as per applicable code and standard.
14 Percentage accuracy of pressure gauge
Answer: 5%
15 ASME standard for general purpose of pipe thread
Answer: B1.20.1
16 If crack what is minimum requirements of girth weld
Ans : Not Acceptable
17 Butt welding fit up of pipe and tee or any fitting thickness different so angular offset
how much accept
a) 3 degree (as per B31.3)
b) 1.5
c) As per WPS design
18 API code of ball valve
Ans: API 608
19 ASME standard for thread component?
Ans: ASME B16.11
20 Which material content increase the hardness?
Ans: Carbon
21 What will be MDMT (minimum design metal temperature) in impact test for A106
pipe? A-106 Gr B -29◦C
22 Question related to thermally cutting of steel which one is not accepted?
Ans: Internal and external surfaces to be thermally cut or welded shall be clean and free
from paint, oil, rust, scale, and other material that would be detrimental to either the
weld or the base metal when heat is applied.
End preparation is acceptable only if the surface is reasonably smooth and true, and slag
from oxygen or arc cutting is cleaned from thermally cut surfaces. Discoloration
remaining on a thermally cut surface is not considered detrimental oxidation.
23 Branch connections, 4 inch and smaller, including drain and vent valves and
drip legs of all sizes, shall be located at a minimum horizontal distance of _______
mm, as per Aramco standard
Ans :610 mm
24 Which standard will you refer for quality standard for steel casting, for valve,
flanges fitting and other component for liquid penetrant testing method?
A-MSS SP-55
25 6” XS Sch. What is the Pre heat Temperature?
(95◦C, 100◦C, As per WPS & Engineering design)
26 Corrosion Resistance gate valve standard.
API603
27 What is the elongation of cold bending & forming during impact test?
Ans: 5%
28 What shall be done when slip-on flange subject to severe erosion, crevice
corrosion to cyclic loading.
Ans: A slip-on flange shall be double-welded as shown in Figure 328.5.2B
29 impact value of three specimen is 12 and 15 and 17 what is average impact
value?
A less than 15 B greater than 15 c 17
30 As per B31.3 hardness test of production weld & hot bent &
hot formed piping are
Intended to verify satisfactory heat treatment

Necessary to verify acceptable hardness results
Necessary to verify acceptable grain refinement
None of these is correct
31 Ring joint gasket must be in accordance with which of the

following
ASME B16.21
ASME B16.5
ASME B16.20
ASME B16.47
32 Furnace butt Welding pipe process?
Ans: Pipe having its longitudinal butt joint forge welded by the
mechanical pressure developed in passing the hot-formed and edge
heated skelp through a set of round pass welding rolls.
33 Deficiency found during pressure testing what inspector will do?
RENDT
RE PRESSURE TEST
REPAIR
NONE OF THE ABOVE
34 procedure qualification by others
Ans chapter no 5
35 progressive sampling of examination
Ans read carefully chapter 6 para 341.3.4
36 extent of required examination
Ans para 341.4

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Cbt exam piping

1 What is percentage of chloride content concentration in water for SS material?

Answer: (Less than 50 PPM)

2 Who is the responsible to provide the material and workmanship.

Answer: Tightness of the flanged joint and threaded joints

4 Blind Flange Formula

Answer: As per WPS

7 Owner inspector does not match the below given

(A) AWS + 5 years’ Experience (B) C SWIP + 5 years’ Experience

(C) CWIP+ 5 years’ Experience (C) 5 years’ Experience IN Design

8 Standard for Steel bonnet gate valve

Answer: API 600

9 Bending distance for circumference weld

10 What is standard for gate valve 4 inch

Answer: API 602

11 Threading fitting standard

12 2G,5G position qualified welder qualification range

14 Percentage accuracy of pressure gauge

15 ASME standard for general purpose of pipe thread

16 If crack what is minimum requirements of girth weld

Ans : Not Acceptable

a) 3 degree (as per B31.3)

c) As per WPS design

18 API code of ball valve

Ans: API 608

19 ASME standard for thread component?

Ans: ASME B16.11

20 Which material content increase the hardness?

22 Question related to thermally cutting of steel which one is not accepted?

Intended to verify satisfactory heat treatment

31 Ring joint gasket must be in accordance with which of the

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