Mechanical Engineering  >  GATE Mechanical (ME) 2023 Mock Test Series  >  Test: Fabrication Processes (Welding) - 1 Download as PDF

Test: Fabrication Processes (Welding) - 1


Test Description

20 Questions MCQ Test GATE Mechanical (ME) 2023 Mock Test Series | Test: Fabrication Processes (Welding) - 1

Test: Fabrication Processes (Welding) - 1 for Mechanical Engineering 2022 is part of GATE Mechanical (ME) 2023 Mock Test Series preparation. The Test: Fabrication Processes (Welding) - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Fabrication Processes (Welding) - 1 MCQs are made for Mechanical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Fabrication Processes (Welding) - 1 below.
Solutions of Test: Fabrication Processes (Welding) - 1 questions in English are available as part of our GATE Mechanical (ME) 2023 Mock Test Series for Mechanical Engineering & Test: Fabrication Processes (Welding) - 1 solutions in Hindi for GATE Mechanical (ME) 2023 Mock Test Series course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Test: Fabrication Processes (Welding) - 1 | 20 questions in 60 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study GATE Mechanical (ME) 2023 Mock Test Series for Mechanical Engineering Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you?
Test: Fabrication Processes (Welding) - 1 - Question 1

Assertion (A): Aluminium has poor weldability.              

Reason (R): Aluminium has high thermal conductivity and high affinity to oxygen.  

Test: Fabrication Processes (Welding) - 1 - Question 2

Which of the following effects are possible due to residual stresses in welding?    

1.  Reduce dimensional stability.  

2.  Weld cracking.

3.  Effect on fatigue strength   

4.  Reduction in the creep strength.

Select the correct answer using the code given below:  

Test: Fabrication Processes (Welding) - 1 - Question 3

Assertion (A): A sound welded joint should not only be strong enough but should also exhibits a good amount of ductility                    

Reason (R): Welding process is used for fabricating mild steel components only  

Test: Fabrication Processes (Welding) - 1 - Question 4

The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is  

Test: Fabrication Processes (Welding) - 1 - Question 5

Consider the following statements in respect of oxy-acetylene welding:    

1. The joint is not heated to a state of fusion.       

2. No pressure is used.    

3. Oxygen is stored in steel cylinder at a pressure of 14 MPa.    

4. When there is an excess of acetylene used, there is a decided change in the appearance of flame.    

Which of the statements given above are correct?  

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 5

the joint is heated to a state of fusion.

Test: Fabrication Processes (Welding) - 1 - Question 6

Assertion (A): If neutral flame is used in oxy-acetylene welding, both oxygen and acetylene cylinders of same capacity will be emptied at the same time.  

Reason (R): Neutral flame uses equal amounts of oxygen and acetylene.  

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 6

Both A and R are true and R is the correct explanation of A

Test: Fabrication Processes (Welding) - 1 - Question 7

In manual arc welding, the equipment should have drooping characteristics in order to maintain 

Test: Fabrication Processes (Welding) - 1 - Question 8

Open-circuit voltage of 60 V and current of 160A were the welding conditions for arc welding of a certain class of steel strip of thickness 10 mm. For arc welding of 5mm thick strip of the same steel, the welding voltage and current would be  

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 8

Speed of the welding remains constant so metal deposition rate will be halved.

Test: Fabrication Processes (Welding) - 1 - Question 9

The electrodes used in arc welding are coated. This coating is not expected to 

Test: Fabrication Processes (Welding) - 1 - Question 10

Pinch effect in welding is the result of             

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 10

A pinch welding gives narrow and long flame which is concentrated on desired part, it is achieving by an induction coil, which results in electromagnetic forces.

Test: Fabrication Processes (Welding) - 1 - Question 11

The coating material of an arc welding electrode contains which of the following?  

1. Deoxidising agent  

2. Arc stabilizing agent  

3. Slag forming agent

Select the correct answer using the code given below:  

Test: Fabrication Processes (Welding) - 1 - Question 12

 Which one of the following welding processes uses non- consumable electrodes?   

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 12

TlG welding uses non consumable electrodes.

Test: Fabrication Processes (Welding) - 1 - Question 13

For butt -welding 40 mm thick steel plates, when the expected quantity of such jobs is 5000 per month over a period of 10 year, choose the best suitable welding process out of the following available alternatives. 

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 13

We need maximum metal deposition rate so choice SAW.
Note: You know maximum metal deposition rate of all welding is SAW and it may joint 40 mm thick plates easily.

Test: Fabrication Processes (Welding) - 1 - Question 14

Tool material not suited to resistance welding is          

Test: Fabrication Processes (Welding) - 1 - Question 15

Spot welding of two 1 mm thick sheets of steel (density = 8000 kg/m3) is carried out successfully by passing a certain amount of current for 0.1 second through the electrodes. The resultant weld nugget formed is 5 mm in diameter and 1.5 mm thick. If the latent heat of fusion of steel is 1400 kJ/kg and the effective resistance in the welding operation in 200 Ω , the current passing through the electrodes is approximately    

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 15

Heat required for melting = (mL) =

Test: Fabrication Processes (Welding) - 1 - Question 16

Consider the following processes:                                                          

1. Gas welding    

2. Thermit welding  

3. Arc welding    

4. Resistance welding

The correct sequence of these processes in increasing order of their welding temperatures is  

Test: Fabrication Processes (Welding) - 1 - Question 17

Consider the following welding processes:

1. TIG welding    

2. Submerged arc welding

3. Electro-slag welding  

4. Thermit welding              

Which of these welding processes are used for welding thick pieces of metals?  

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 17

Correct Answer :- d

Explanation : The three main welding techniques that are used in a shipyard are as follows:

Arc Welding

Gas Welding

Resistance Welding

 

Electro-slag welding is used for joining thick materials in the vertical plane. It is not an arc process, depending on the electrical resistivity of molten flux to produce the heat necessary to melt both filler and base metal. As the flux melts, a slag blanket (2.5–3.8 mm thick) is formed.

Test: Fabrication Processes (Welding) - 1 - Question 18

Electron beam welding can be carried out in                  

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 18

Electron beam welding is carried out in vacuum.

Test: Fabrication Processes (Welding) - 1 - Question 19

Which one of the following welding processes consists of minimum heat affected zone (HAZ)?   

Test: Fabrication Processes (Welding) - 1 - Question 20

Which one of the following is not a fusion welding process?                 

Detailed Solution for Test: Fabrication Processes (Welding) - 1 - Question 20

In Brazing base metal is not melted. And filler metal is not same or similar to that of base metal.

Use Code STAYHOME200 and get INR 200 additional OFF
Use Coupon Code
Information about Test: Fabrication Processes (Welding) - 1 Page
In this test you can find the Exam questions for Test: Fabrication Processes (Welding) - 1 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Fabrication Processes (Welding) - 1, EduRev gives you an ample number of Online tests for practice