PETROVIETNAM MANPOWER TRAINING COLLEGE
No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

No.

Questions

Answer

Q. 1

For a liquid or a gas to flow, there must be a difference in:

pressure

Q. 2

Throttling refers to regulating flow:

rate

Q. 3

When a valve is partially open, it is said to be in then position

maximum flow

Q. 4

The main function of packing in a gate valve is to:

stop leakage

This Q. is referred to the exhibit number 1 (A, B, C)

solid wedge
gate

Q. 5

Gate A is a:

Q. 6

Q. 7

Q. 8

Gate Valve

When conditions require that a valve must be quickly opened and closed, which kind
of valve should be used?

Plug valve

Verical lift
check valve


PETROVIETNAM MANPOWER TRAINING COLLEGE

No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

Q. 9

The main function of a check valve

Q. 10

The rate of
flow

Bonnet

Look at this picture of a valve Point A is the

Q. 11

Body

Look at this picture of a valve Point B is the:

Q. 12

The gasket

The fix this leak, the worker probably has to replace


PETROVIETNAM MANPOWER TRAINING COLLEGE

No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

Q. 13

Check valves are used__________

for
unidirectional
flow

Q. 14

The most economical flow control valve for use with large diameter pipes is a
__________

Butterfly valve

Q.15

Two piping system are said to be equivalent, when the __________ are same

fluid flow rate &
friction loss

Q. 16

A tube is specified by its__________

thickness &

outer diameter
both

Q. 17

Nominal size of a pipe is an indication of its __________ diameter

approximate

Q. 18

For pipes that must be broken at intervals for maintenance, the connector used should
be a/an__________

union

Q. 19 The nominal size of a hose pipe is specified by its
Q. 20
Q. 21

ID

The valve commonly used in pipes larger than 2" diameter is a__________

Gate valve

Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates
its__________

Neither inner

nor outer meter

Q. 22 Which type of equipment is not a kind of piping equipment?

Furnace

Q. 23

Eccentric
Reducer
The equipment bellow is called as

Q. 24 Body of gate valve can not be made by

PVC


PETROVIETNAM MANPOWER TRAINING COLLEGE
No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

Q. 25

Ball valve

The name of valve in picture below is
Q. 26 The valve body can not be connected to the process piping by:

Glue


Q. 27 This type of pipe is commonly used for water, steam, oil, and gas:

Steel or wrought
iron

Q. 28 Diaphragm valve is used for following case :

Fluid metal –
corrosive or
sticky

Q. 29 This type of pipe is commonly used for water or gas service, and also as soil pipe

Cast-iron

Q. 30 Lift check valve is used for

horizontal pipe

Q. 31

Flat face

Q. 32

Socket weld
flange

Q. 33 What is diffirence of relief valve and safety valve


Relief valve are
used n liquid
services and
Safety valves


PETROVIETNAM MANPOWER TRAINING COLLEGE
No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

are used in das
services
Q. 34

ID of 1/4" schedule 40 pipe is 0364" ID of a 1/2" schedule 40 pipe would be
__________ inch

Q. 35 This is not the purpose of piping inspection?
Q. 36

Socket welded joints are made by inserting the end of the pipe into a recess in a fitting
or valve and then………the joint

0.622
Weld the piping
Fillet welding

Q. 37 Factors to consider when classifying piping are:
A)


Toxicity

B)

Combustibility

C)

Volatility

D)

All of these

Q. 38

All of these

Erosion is the removal of surface material by the action of numerous individual
impacts of __________

A)

solid

B)

liquid particles

C)


cavitation

D)

All of these

All of these

Ultrasonic testing (UT) is a family of__________testing techniques based in the
propagation of ultrasonic waves in the object or material tested

Non destructive

Q. 39

Q. 40 Which of the following statements is the advantages of Ultrasonic testing (UT)

High penetrating
power, which
allows the
detection of the
flaw deep in the
part

Q. 41 Radiographic Testing (RT) is a __________method of inspecting materials for hidden non-destructive
flaws by using the ability of short wavelength electromagnetic radiation (high energy


PETROVIETNAM MANPOWER TRAINING COLLEGE

No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

photons) to penetrate various materials
Q. 42 Nonmetallic piping systems are often used for fluids that is __________

Environmentally
benign

Q. 43 pressure test conducted on piping system can be tested for

All of these

Q. 44 When test the speed of leak in the ball valve, the test time depends on :

Class of valve

Q. 45 The pipe fitting which makes a 180° turn is called a/an….

Return fitting

Q. 46

Q. 47

Which type of gasket is most frequently used in a high-pressure hydraulic system
assembled with socket weld flanges?

O ring


Before breaking open the pipe joints for repair, what should be done with the isolation
valves on a high pressure steam system?

Check that the
valves are
closed, tagged
and locked out

Q. 48 Which of the following is not a reason for using cutting oil when threading pipe?

To protect
threads from
rust

Q. 49 Internal Visual Inspection for Piping system include following duties:
A)

Inspection Corrosion, Erosion, and Fouling

B)

Inspection cracks

C)

Inspection Gasket Faces of Flanges

D)

All of these


All of these

Which type of following Ultrasonic thickness instrument can measure pipe with 0.04
Q. 50
in to 20 in diameter?

Numeric
thickness
readout

Q. 51 External Visual Inspection for Piping system include following duties:

Inspection
lecking

Q. 52 Which of the following is the type of pipe inspection plan?
A)

Safety


PETROVIETNAM MANPOWER TRAINING COLLEGE
No. 43, 30/4 Road, Ward 9, Vung Tau, Vietnam
Tel: (064) 3838157; Fax: (064) 3838452 Web:

B)

Describe any required repairs


Describe any
required
repairs

Q. 53 Which of the following is the task of the inspection plan?

A)

Shedule required to monitor damage mechanisms

B)

Reliability and Efficient Operation

C)

Safety

Q. 54 Which of the following is an aim of pipe inspection plan?
A)

A leak or failure a piping system

B)

Efficient Operation

C)

Finding out and complementing the default


Q. 55 What should inspector consider following?
A)

Planning work the collaborative

B) Operating pressure ranges
Q. 56 Which of the following should do to develop an inspection plan?
A) Identifying and evaluating the process fluid
B) Collaborative work of the inspector
Q. 57 Suiting the fluid working with Nonmetallic Piping?
Q. 58 Kind of the traditional NDE techniques assess the nonmetallic piping?
Q. 59 Purpose of testing?
Q. 60 Performing of pressure testing?

Shedule
required to
monitor damage
mechanisms