Kurukshetra a journal on rural development is published by
A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission
Question 3Single Answer
In ruby laser, the stimulated emission is due to transition from
A
metastable state to any lower state
B
any higher state of lower state
C
metastable state to ground state
D
any higher state to ground state
Question 4Single Answer
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
A
between 7 and 8
B
between 5 and 6
C
between 6 and 7
D
between 10 and 11
Question 5Single Answer
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
A
1.93 A
B
9.65 A
C
19.3 A
D
0.965 A
Question 6Single Answer
The respiratory quotient during cellular respiration would depend on
A
the nature of enzymes involved
B
the nature of the substrate
C
the amount of carbon dioxide released
D
the amount of oxygen utilised
Question 7Single Answer
Which of the following is not a green - house gas ?
A
Water vapour
B
Carbon monoxide
C
Methane
D
Oxygen
Question 8Single Answer
The elements of the set {x : x is an integer, x2 : 4} can be represent as .....Z..... . Here, Z refers to
A
{–2, 2}
B
{–1, 0, 1}
C
{–2, –1, 0, 1, 2}
D
{0, 1, 2}
Question 9Single Answer
A
B
C
D
None of these
Question 10Single Answer
If Y = {x : x is a positive factor of the number 2p – 1(2p – 1), where 2p – 1 is a prime number}, then Y can be represent in roster form as
A
{2}
B
{1, 2}
C
{1, 2, 22, ....., 2p – 1}
D
{1, 2, 22, 23,.... 2p – 1, (2p – 1)}
Question 11Single Answer
The set {x : x is a positive integer less than 6 and 3x – 1 is an even number} in roster form is
A
{1, 2, 3, 4, 5}
B
{1, 2, 3, 4, 5, 6}
C
{2, 4, 6}
D
{1, 3, 5}
Question 12Single Answer
If A B and A B, then
A
A is called a proper subset of B
B
A is called a super set of B
C
A is not a subset of B
D
B is a subset of A
Question 13Single Answer
What fraction of India's total area is covered by Rajasthan?
A
Around 5%
B
Around 15%
C
Around 10%
D
Around 20%
Question 14Single Answer
Which of the following statements is NOT TRUE?
A
Rajasthan's total geographical area is around 3.42 Lakh Sq. Km.
B
Total Populations of Rajasthan is around 10 crore.
C
Out of total population of Rajasthan, 24.9% people live in urban regions.
D
All of the above
Question 15Single Answer
Which district has highest population in Rajasthan?
A
Jaipur
B
Jaisalmer
C
Udaipur
D
Ajmer
Question 16Single Answer
What fraction of Rajasthan's total area is covered by Thar Desert?
A
Around 30%
B
Around 40%
C
Around 60%
D
Around 70%
Question 17Single Answer
The temple city of Osean in Rajasthan was established by which of the following Rajputs?
A
Gurjar Pratiharas
B
Chauhans
C
Solankis
D
Sisodias
Question 18Single Answer
The Jhamarkotra mines of Rajasthan are best known for which among the following minerals?
A
Mica
B
Zinc
C
Rock Phosphate
D
Lime Stone
Question 19Single Answer
What is the population of Scheduled Caste in Rajasthan?
A
20.3%
B
21%
C
17.8%
D
21.6%
Question 20Single Answer
According to census 2011, what is the literacy rate in Rajasthan?
A
60%
B
78%
C
66%
D
55%
Question 21Single Answer
How many people are working in Rajasthan (in percentage)?
A
56%
B
23%
C
43.6%
D
52.4%
Question 22Single Answer
The word 'Rajputana' for Rajasthan was first used by:
A
James Todd
B
George Thomas
C
Geogra Greeson
D
Kushal Labh
Question 23Single Answer
How many districts are there in Rajasthan in 2021?
A
21
B
16
C
30
D
33
Question 24Single Answer
Rajasthan shares the longest border with which state?
A
Gujarat
B
Madhya Pradesh
C
Uttar Pradesh
D
Haryana
Question 25Single Answer
Which district of the Rajasthan does not touch the international border?
A
Ganganagar
B
Bikaner
C
Barmer
D
Jodhpur
Question 26Single Answer
Which of the following districts of Rajasthan has shortest international boundary?
A
Jaisalmer
B
Bikaner
C
Barmer
D
Ganganagar
Question 27Single Answer
With how many states Rajasthan shares its border?
A
7
B
5
C
6
D
3
Question 28Single Answer
What is the Official Language of Rajasthan?
A
Hindi
B
Rajasthani
C
English
D
Marwari
Question 29Single Answer
On which day Rajasthan Diwas is observed every year?
A
April 30th
B
February 28th
C
March 30th
D
April 28th
Question 30Single Answer
Which of the following is the state animal of Rajasthan?
A
Chinkara
B
Tiger
C
Sloth bear
D
Stork Crane
Question 31Single Answer
Which desert is located in Rajasthan?
A
Gobi Desert
B
Thar Desert
C
Sahara Desert
D
Kalahari Desert
Question 32Single Answer
What is the state tree of Rajasthan?
A
Rhododendron
B
Palmyra palm
C
Deodar
D
Khejri
Question 33Single Answer
which city in Rajasthan was designated as a UNESCO World Heritage City?
A
Jaipur
B
Jodhpur
C
Udaipur
D
Jaisalmer
Question 34Single Answer
What is the major event celebrated during the "Gangaur Festival" in Rajasthan?
A
Camel Festival
B
Elephant Festival
C
Teej Festival
D
Kite Festival
Question 35Single Answer
Which wildlife sanctuary in Rajasthan is known for its population of Indian tigers?
A
Sariska Wildlife Sanctuary
B
Keoladeo National Park
C
Ranthambhore National Park
D
Desert National Park
Question 36Single Answer
The annual "Pushkar Fair" in Rajasthan is famous for:
A
Cattle trading and camel fair
B
Folk dance performances
C
Handicrafts exhibition
D
Religious processions
Question 37Single Answer
Which river is the major river flowing through Rajasthan?
A
Yamuna
B
Ganges
C
Chambal
D
Luni
Question 38Single Answer
When was the Constituent Assembly of India formed?
A
1946
B
1947
C
1948
D
1950
Question 39Single Answer
Who was the Chairman of the Drafting Committee of the Indian Constitution?
A
Dr. Rajendra Prasad
B
Dr. B.R. Ambedkar
C
Jawaharlal Nehru
D
Sardar Vallabhbhai Patel
Question 40Single Answer
The idea of the Constituent Assembly was first put forward by:
A
Mahatma Gandhi
B
M.N. Roy
C
Jawaharlal Nehru
D
Sardar Vallabhbhai Patel
Question 41Single Answer
Who is known as the "Father of the Indian Renaissance" ?
A
Raja Ram Mohan Roy
B
Swami Vivekananda
C
Rabindranath Tagore
D
Mahatma Gandhi
Question 42Single Answer
Which classical dance form is associated with Tamil Nadu ?
A
Kathak
B
Kuchipudi
C
Bharatanatyam
D
Odissi
Question 43Single Answer
Which of the following is a famous festival of Kerala ?
A
Pongal
B
Onam
C
Baisakhi
D
Makar Sankranti
Question 44Single Answer
Which organization developed the "Bharatpol" portal?
A
Intelligence Bureau
B
Central Bureau of Investigation
C
National Investigation Agency
D
Enforcement Directorate
Question 45Single Answer
Who is the President of Singapore who visited India from?
A
Bongbong Marcos
B
Lee Hsien Loong
C
Tharman Shanmugaratnam
D
Sam Altman
Question 46Single Answer
Which of the following is a primary goal of modern agricultural practices?
A
Maximizing the use of manual labor
B
Increasing crop yields and efficiency
C
Reducing the use of technology in farming
D
Relying solely on traditional farming methods
Question 47Single Answer
What is the term for the application of scientific principles and new technologies to agriculture?
A
Traditional farming
B
Subsistence farming
C
Modern farming
D
Organic farming
Question 48Single Answer
Which of the following is NOT a characteristic of modern agriculture?
A
Use of high-yielding variety seeds
B
Increased reliance on chemical fertilizers and pesticides
C
Extensive use of manual labor
D
Mechanization of farming operations
Question 49Single Answer
What is the main advantage of using genetically modified (GM) crops in modern agriculture?
A
They require less water
B
They are always resistant to all pests and diseases
C
They can potentially increase yields and reduce the need for pesticides
D
They are easier to harvest manually
Question 50Single Answer
Which of the following is a key aspect of precision agriculture?
A
Uniform application of fertilizers across the entire field
B
Using satellites and GPS to manage and optimize farming practices
C
Ignoring variations in soil and crop conditions within a field
D
Relying solely on visual inspection for decision-making
Important Questions Package
RVUNL Plant Attendant Group 4 Exam Online Question Bank Package
Buy RVUNL Plant Attendant Group 4 Important Questions, MCQ, question answer in Hindi & English. It will help you to score high marks in RVUNL Plant Attendant Group 4 question bank 2026 in Online, PDF & Print study material.
+ Free Monthly Current Affairs, GK & more PDF Download
Sr.
Package Name
Amount
1.
RVUNL Plant Attendant (Group 4) Prelims Exam - Hindi
Description : 1000 Question With Amswer
₹101[₹500]
2.
RVUNL Plant Attendant (Group 4) Prelims Exam - Hindi
Description : 2000 Question With Answer
₹151[₹500]
3.
RVUNL Plant Attendant (Group 4) Prelims Exam - English
Description : 1000 Question With Answer
₹101[₹500]
4.
RVUNL Plant Attendant (Group 4) Prelims Exam - English
Description : 2000 Question With Answer
₹151[₹500]
5.
RVUNL Plant Attendant (Group 4) Main Exam - Hindi
Description : 1000 Question With Answer
₹101[₹500]
6.
RVUNL Plant Attendant (Group 4) Main Exam - Hindi
Description : 2000 Question With Answer
₹151[₹500]
7.
RVUNL Plant Attendant (Group 4) Main Exam - English
Description : 1000 Question With Answer
₹101[₹500]
8.
RVUNL Plant Attendant (Group 4) Main Exam - English
Description : 2000 Question With Answer
₹151[₹500]
9.
RVUNL Plant Attendant (Group 4) Prelims Exam - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151[₹550]
10.
RVUNL Plant Attendant (Group 4) Prelims Exam - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151[₹550]
11.
RVUNL Plant Attendant (Group 4) Main Exam - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151[₹550]
12.
RVUNL Plant Attendant (Group 4) Main Exam - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151[₹550]
13.
RVUNL Plant Attendant (Group 4) Prelims Exam Question Bank Book - Hindi
Description : 1000 Question with Answer (Printed Material)
₹450[₹850]
14.
RVUNL Plant Attendant (Group 4) Prelims Exam Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390[₹650]
15.
RVUNL Plant Attendant (Group 4) Main Exam Question Bank Book - Hindi
Description : 1000 Question with Answer (Printed Material)
₹450[₹850]
16.
RVUNL Plant Attendant (Group 4) Main Exam Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390[₹650]
Technical Knowledge & Skill
Question 51Single Answer
What is the primary fuel gas used in oxy-acetylene welding?
A
Propane
B
Methane
C
Acetylene
D
Butane
Question 52Single Answer
In gas welding, which gas supports combustion?
A
Nitrogen
B
Oxygen
C
Carbon dioxide
D
Argon
Question 53Single Answer
Which type of flame is ideal for mild steel welding in gas welding?
A
Oxidizing flame
B
Neutral flame
C
Carburizing flame
D
Reducing flame
Question 54Single Answer
The electrode used in SMAW (Shielded Metal Arc Welding) is coated with:
A
Copper
B
Flux
C
Zinc
D
Nickel
Question 55Single Answer
In arc welding, the purpose of the flux coating is to:
A
Stabilize the arc
B
Increase electrode lifespan
C
Reduce heat generation
D
Remove impurities
Question 56Single Answer
The primary function of a welding transformer is to:
A
Reduce current
B
Increase voltage
C
Convert AC to DC
D
Step down voltage for safe welding
Question 57Single Answer
What is the typical operating voltage for manual arc welding?
A
200–250V
B
100–150V
C
20–100V
D
10–20V
Question 58Single Answer
Which welding process uses a non-consumable tungsten electrode?
A
MIG welding
B
TIG welding
C
SMAW
D
Gas welding
Question 59Single Answer
What type of gas is used in TIG welding for shielding?
A
Helium
B
Oxygen
C
Hydrogen
D
Nitrogen
Question 60Single Answer
Which welding technique is most suitable for thin metal sheets?
A
Gas welding
B
Arc welding
C
Spot welding
D
Plasma welding
Question 61Single Answer
The most common welding hazard is:
A
Fire
B
Electric shock
C
Noise pollution
D
Vibration
Question 62Single Answer
Which type of protective gear is essential for arc welding?
A
Rubber gloves
B
Safety goggles
C
Welding helmet with shaded lens
D
Cotton apron
Question 63Single Answer
The recommended shade number for electric arc welding helmets is:
A
4-5
B
6-8
C
10-14
D
15-20
Question 64Single Answer
What should be done to prevent fire hazards in gas welding?
A
Use oxygen-rich flames
B
Store acetylene cylinders upright
C
Use wooden surfaces for welding
D
Keep gas cylinders near the flame
Question 65Single Answer
In welding operations, fumes and gases are typically controlled by:
A
Increasing amperage
B
Reducing welding speed
C
Proper ventilation
D
Using oil-based electrodes
Question 66Single Answer
Which welding defect is caused by insufficient heat input?
A
Crater
B
Porosity
C
Incomplete fusion
D
Burn-through
Question 67Single Answer
Which defect is caused by gas bubbles trapped in the weld metal?
A
Porosity
B
Undercut
C
Cracking
D
Incomplete fusion
Question 68Single Answer
What causes cracking in welded joints?
A
Excessive heat input
B
Slow welding speed
C
Rapid cooling or improper filler material
D
Use of high-quality electrodes
Question 69Single Answer
Which defect occurs due to improper electrode angle?
A
Slag inclusion
B
Spatter
C
Arc blow
D
Underfill
Question 70Single Answer
To avoid undercut in welding, you should:
A
Increase travel speed
B
Reduce welding voltage
C
Maintain proper electrode angle and speed
D
Use larger electrodes
Question 71Single Answer
The horizontal welding position is designated as:
A
1G
B
2G
C
3G
D
4G
Question 72Single Answer
In welding symbols, the arrow line points to:
A
The type of filler material
B
The welding position
C
The joint to be welded
D
The type of power supply
Question 73Single Answer
Which welding position is considered the most difficult?
A
Flat position
B
Horizontal position
C
Overhead position
D
Vertical position
Question 74Single Answer
In a fillet weld symbol, the size of the weld is indicated on the:
A
Left side of the symbol
B
Right side of the symbol
C
Below the reference line
D
Above the reference line
Question 75Single Answer
Which welding position requires welding on vertical surfaces?
A
1F
B
2F
C
3F
D
4F
Question 76Single Answer
Which welding process is ideal for joining dissimilar metals?
A
Spot welding
B
Friction welding
C
MIG welding
D
Gas welding
Question 77Single Answer
Which welding method is best suited for automated welding applications?
A
TIG welding
B
MIG welding
C
SMAW
D
Gas welding
Question 78Single Answer
Which welding method produces the highest heat concentration?
A
Arc welding
B
Plasma arc welding
C
Gas welding
D
Laser beam welding
Question 79Single Answer
In plasma cutting, the temperature of the plasma arc is typically:
A
1000°C
B
3000°C
C
10,000°C
D
20,000°C
Question 80Single Answer
Which welding process is known for its high-speed operation?
A
Resistance welding
B
Laser welding
C
TIG welding
D
Arc welding
Question 81Single Answer
The most common material used for electrodes is:
A
Zinc
B
Copper
C
Mild steel
D
Aluminium
Question 82Single Answer
Which electrode type is suitable for cast iron welding?
A
E6013
B
E7018
C
Nickel alloy electrode
D
Copper-coated electrode
Question 83Single Answer
Which welding method is best for stainless steel?
A
SMAW
B
TIG welding
C
Gas welding
D
Spot welding
Question 84Single Answer
What is the primary function of filler material in welding?
A
Stabilize the arc
B
Create a protective layer
C
Provide additional material for the joint
D
Control temperature
Question 85Single Answer
Which welding rod is commonly used for high-strength welding?
A
E6010
B
E7018
C
E6013
D
E7024
Question 86Single Answer
Which type of fire extinguisher is best suited for electrical fires during welding?
A
Water extinguisher
B
Foam extinguisher
C
CO2 extinguisher
D
Dry powder extinguisher
Question 87Single Answer
What is the purpose of a flashback arrestor in gas welding?
A
Prevent gas leakage
B
Control flame temperature
C
Prevent flame from entering the gas cylinder
D
Increase welding speed
Question 88Single Answer
In case of an acetylene leak, what should be done first?
A
Turn off the oxygen supply
B
Increase the welding speed
C
Close the acetylene cylinder valve
D
Spray water on the flame
Question 89Single Answer
Which safety practice is crucial to avoid arc eye (welding flash)?
A
Using tinted glasses
B
Wearing cotton gloves
C
Maintaining a fast welding speed
D
Wearing a flame-resistant jacket
Question 90Single Answer
For safe welding operations, the minimum distance between gas cylinders and the welding area should be:
A
1 meter
B
2 meters
C
5 meters
D
10 meters
Question 91Single Answer
Which method is commonly used to detect internal weld defects?
A
Visual inspection
B
Radiographic testing (X-ray)
C
Hammer test
D
Magnetic particle inspection
Question 92Single Answer
Which of the following tests is performed to check surface cracks in welds?
A
Ultrasonic test
B
Radiographic test
C
Dye penetrant test
D
Destructive test
Question 93Single Answer
The nick-break test is used to examine:
A
Internal porosity
B
Surface finish
C
Weld ductility
D
Weld toughness
Question 94Single Answer
Which of the following defects is identified by ultrasonic testing?
A
Surface rust
B
Deep cracks and voids
C
Weld spatter
D
Weld undercut
Question 95Single Answer
Which type of inspection method is most suitable for testing non-magnetic materials like aluminum?
A
Magnetic particle inspection
B
Radiographic inspection
C
Eddy current testing
D
Ultrasonic inspection
Question 96Single Answer
In welding symbols, a dashed reference line indicates:
A
A completed weld
B
A field weld
C
A hidden weld
D
A temporary weld
Question 97Single Answer
In welding drawings, a circle at the junction of the arrow and reference line signifies:
A
Weld on one side
B
Weld all around the joint
C
A bevel weld
D
A groove weld
Question 98Single Answer
The letter ‘R’ in a welding symbol refers to:
A
Root opening
B
Reinforcement
C
Radius
D
Resistance
Question 99Single Answer
Which symbol indicates a fillet weld?
A
Triangle
B
Square
C
Circle
D
Diamond
Question 100Single Answer
The thickness of a weld is represented by:
A
The size of the electrode
B
The welding current value
C
The number on the left side of the welding symbol
D
The number on the right side of the welding symbol
Question 101Single Answer
What does TIG welding stand for?
A
Tungsten Inert Gas welding
B
Thermal Inert Gas welding
C
Tube Inert Gas welding
D
Terminal Inert Gas welding
Question 102Single Answer
What does MIG welding stand for?
A
Metal Inert Gas welding
B
Manual Inert Gas welding
C
Machine Inert Gas welding
D
Magnesium Inert Gas welding
Question 103Single Answer
In TIG welding, which type of electrode is used?
A
Consumable electrode
B
Non-consumable tungsten electrode
C
Copper-coated electrode
D
Zinc-plated electrode
Question 104Single Answer
Which type of electrode wire is used in MIG welding?
A
Tungsten electrode
B
Consumable electrode wire
C
Carbon electrode
D
Graphite electrode
Question 105Single Answer
Which shielding gas is commonly used in TIG welding?
A
Argon
B
Oxygen
C
Carbon dioxide
D
Nitrogen
Question 106Single Answer
Which gas is commonly used in MIG welding for shielding purposes?
A
Oxygen
B
Helium
C
Carbon dioxide
D
Acetylene
Question 107Single Answer
In TIG welding, what is the primary role of the tungsten electrode?
A
To melt the base metal
B
To provide filler material
C
To conduct the electric arc without melting
D
To stabilize the welding arc
Question 108Single Answer
Which power supply is typically used for TIG welding?
A
AC only
B
DC only
C
AC or DC depending on the material
D
High-frequency current
Question 109Single Answer
Which power supply is commonly used for MIG welding?
A
AC only
B
DC with reverse polarity
C
DC with straight polarity
D
AC with low voltage
Question 110Single Answer
What type of welding torch is used in TIG welding?
A
Plasma torch
B
Wire-fed torch
C
Tungsten torch
D
Gas-cooled torch
Question 111Single Answer
Which PPE (Personal Protective Equipment) is essential for TIG welding?
A
Leather gloves only
B
Safety glasses only
C
Welding helmet, gloves, and fire-resistant clothing
D
Rubber-soled shoes only
Question 112Single Answer
Which of the following is a common hazard in MIG welding?
A
Arc flash
B
Gas explosion
C
Oxygen deficiency
D
Radiation exposure
Question 113Single Answer
In TIG welding, why should the tungsten electrode not touch the molten weld pool?
A
To avoid contamination of the weld
B
To reduce weld strength
C
To increase heat penetration
D
To improve arc stability
Question 114Single Answer
Which safety measure should be taken while changing a MIG welding wire spool?
A
Wear rubber gloves
B
Use a face shield
C
Disconnect the power supply
D
Increase wire speed
Question 115Single Answer
Which of the following gases is considered dangerous in confined spaces during welding?
A
Argon
B
Helium
C
Carbon dioxide
D
Acetylene
Question 116Single Answer
TIG welding is widely used in industries requiring:
A
Heavy fabrication
B
High precision and clean finish
C
Quick and automated welding
D
High-speed welding operations
Question 117Single Answer
Which industry most commonly uses MIG welding for large-scale production?
A
Aerospace industry
B
Automobile industry
C
Jewelry making
D
Medical equipment manufacturing
Question 118Single Answer
Which welding method is best suited for stainless steel fabrication?
A
TIG welding
B
MIG welding
C
Oxy-acetylene welding
D
Resistance welding
Question 119Single Answer
For aluminum welding, which process provides better quality results?
A
TIG welding
B
MIG welding
C
Gas welding
D
Submerged arc welding
Question 120Single Answer
Which welding method is most effective for thin materials?
A
TIG welding
B
MIG welding
C
Arc welding
D
Oxy-fuel welding
Question 121Single Answer
What is the ideal arc length for TIG welding?
A
10-15 mm
B
Equal to the electrode diameter
C
Twice the electrode diameter
D
Close to 1 inch
Question 122Single Answer
In MIG welding, excessive wire feed speed may cause:
A
Incomplete penetration
B
Excessive spatter
C
Porosity
D
Arc instability
Question 123Single Answer
Which defect occurs when shielding gas fails to protect the weld pool?
A
Porosity
B
Cracking
C
Undercut
D
Lack of fusion
Question 124Single Answer
What is the primary cause of tungsten inclusion in TIG welding?
A
High gas pressure
B
Tungsten electrode touching the weld pool
C
Excessive heat input
D
Slow welding speed
Question 125Single Answer
In MIG welding, what causes burn-back?
A
Incorrect shielding gas
B
Too high voltage
C
Wire melting inside the contact tip
D
Insufficient gas flow
Question 126Single Answer
Which of these metals requires AC current for TIG welding?
A
Stainless steel
B
Mild steel
C
Aluminum
D
Copper
Question 127Single Answer
Which shielding gas mixture is commonly used for MIG welding stainless steel?
A
Argon + Oxygen
B
Helium + Nitrogen
C
Argon + Carbon Dioxide
D
Oxygen + Acetylene
Question 128Single Answer
What is the primary advantage of using pulsed MIG welding?
A
Faster wire feed
B
Improved control over heat input
C
Increased gas consumption
D
Reduced spatter
Question 129Single Answer
Which filler rod is commonly used in TIG welding stainless steel?
A
E7018
B
ER308L
C
E6013
D
E7024
Question 130Single Answer
Which welding technique offers the cleanest weld appearance with minimal spatter?
A
MIG welding
B
TIG welding
C
SMAW
D
Flux-cored welding
Question 131Single Answer
In TIG welding, what is the recommended tungsten electrode color code for aluminum welding?
A
Green (Pure Tungsten)
B
Red (Thoriated Tungsten)
C
Blue (Lanthanated Tungsten)
D
Gold (Zirconiated Tungsten)
Question 132Single Answer
Which tungsten electrode type is best suited for DC welding of stainless steel?
A
Green (Pure Tungsten)
B
Red (Thoriated Tungsten)
C
White (Zirconiated Tungsten)
D
Orange (Ceriated Tungsten)
Question 133Single Answer
In MIG welding, what is the purpose of the drive rolls?
A
To control gas flow
B
To guide and feed the welding wire
C
To stabilize the welding arc
D
To cool the welding torch
Question 134Single Answer
Which of the following is the most common wire diameter used in MIG welding for light fabrication work?
A
0.6 mm
B
1.2 mm
C
2.5 mm
D
3.2 mm
Question 135Single Answer
During TIG welding, which of the following filler rods is suitable for welding mild steel?
A
ER70S-2
B
ER308L
C
E6013
D
E7018
Question 136Single Answer
In TIG welding, increasing the gas flow rate excessively can lead to:
A
Improved weld quality
B
Increased spatter
C
Turbulence and contamination of the weld
D
Faster cooling of the weld
Question 137Single Answer
In MIG welding, what should be adjusted to control arc length?
A
Wire feed speed
B
Shielding gas pressure
C
Electrode angle
D
Voltage
Question 138Single Answer
What happens if the wire feed speed is too slow in MIG welding?
A
Excessive spatter
B
Burn-back
C
Porosity
D
Cracking
Question 139Single Answer
In TIG welding, maintaining a short arc length results in:
A
Greater spatter
B
Better arc stability and cleaner welds
C
Reduced gas consumption
D
Increased heat input
Question 140Single Answer
Which of the following is a common issue when the tungsten electrode is contaminated during TIG welding?
A
Stable arc
B
Porosity in weld
C
Uneven bead appearance
D
Both b and c
Question 141Single Answer
What causes wormhole porosity in MIG welding?
A
Moisture in the shielding gas
B
Excessive voltage
C
Poor wire feed speed
D
Contaminated base metal
Question 142Single Answer
Which defect occurs if the TIG welding torch angle is incorrect?
A
Slag inclusion
B
Arc blow
C
Undercut
D
Lack of fusion
Question 143Single Answer
A concave weld bead in MIG welding is caused by:
A
Low voltage settings
B
Excessive heat input
C
Slow travel speed
D
Fast wire feed speed
Question 144Single Answer
Which defect is caused by improper shielding gas flow in TIG welding?
A
Spatter
B
Porosity
C
Cracking
D
Undercut
Question 145Single Answer
In MIG welding, an irregular bead pattern is often a result of:
A
High voltage
B
Low gas pressure
C
Unsteady hand movement
D
Fast travel speed
Question 146Single Answer
To maintain a clean tungsten electrode tip, welders should frequently:
A
Dip the electrode in water
B
Sharpen the electrode using a grinding wheel
C
Increase gas flow
D
Lower the amperage
Question 147Single Answer
In MIG welding, a poor arc start is commonly caused by:
A
Low voltage
B
Dirty contact tip or nozzle
C
Excessive gas pressure
D
Slow travel speed
Question 148Single Answer
Which maintenance practice ensures optimal wire feeding in MIG welding?
A
Increasing the gas pressure
B
Lubricating the wire spool
C
Cleaning the drive rolls and liner regularly
D
Increasing voltage
Question 149Single Answer
If the welding arc flickers frequently in MIG welding, the likely cause is:
A
Insufficient gas pressure
B
Loose ground clamp connection
C
Incorrect torch angle
D
Fast travel speed
Question 150Single Answer
To prevent tungsten contamination in TIG welding, the welder should:
B and A
B, then