Cochin Shipyard Limited Assistant Engineer piping Recruitment Paper 2020
Exam Date – 13th Feb 2020
Shielding gas used for TIG welding process
(a) Carbon Dioxide
(b) Argon
(c) Oxygen
(d) Nitrogen
b
What type of weld represents a triangular shaped symbol?
(a) fillet weld
(b) bevel groove
(c) flare groove
(d) V-groove
a
Typical joining method of copper pipes below 50 NB
(a) Welding
(b) TIG welding
(c) Brazing
(d) Brazing and welding
c
Engine piston are usually made of aluminium alloy because it
(a) is lighter
(b) wear is less
(c) absorbs shocks
(d) is tronger
a
Galvanisation process is
(a) Iron coating
(b) Copper coating
(c) Zinc coating
(d) Aluminum coating
c
What is the most commonly used material for Gasket?
(a) Compressed Asbestors Fibre
(b) Rubber
(c) Polythene
(d) MS Sheet
a
NB in pipe means
(a) Normal Bore
(b) Natural Base
(c) Nominal Bore
(d) Natural Bore
c
What should be the radius of long radius elbow?
(a) 1.5D
(b) 2.0D
(c) 1.0D
(d) 3.0D
a
Areoplanes employ the following type of compressor
(a) radial flow
(b) axial flow
(c) centrifugal flow
(d) central flow
b
What is meant by ‘PWHT’?
(a) Present weld heat treatment
(b) Post weld heat treatment
(c) Primary weld heat treatment
(d) Primary weld humid treatment
b
Which of the following is not counted among safety equipment?
(a) Vacuume reliever
(b) Alarms
(c) Flashback arresters
(d) Temperature reliever
d
What heat treatment is characterized by holding the part at the austenitizing temperature for some time and then slow cooling in the furnance?
(a) Normalizing
(b) Quenching
(c) Annealing
(d) Stress relief
c
To maintain uniform homogenous structure, _____is done on some pipe after the welding is over
(a) Post-heating
(b) Pre-heating
(c) Normalizing
(d) Quenching
a
The smooth finish flange is provided when _____ gasket is provided
(a) Non-metallic
(b) metallic
(c) Rubber
(d) Silica
b
SMAW means
(a) Shell Metal Arc Welding
(b) Shielded Manual Arc Welding
(c) Shielded Metal Arc Welding
(d) Shell Manual Arc Welding
c
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