IES-ESE Mechanical Engineering: Questions 30 - 33 of 81
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Question number: 30
Appeared in Year: 1996
Which of the following methods are used for obtaining directional solidification for riser design
1. Suitable placement of chills
2. Suitable placement of chaplets
3. Employing padding
Select the correct answer.
1 and 2
1 and 3
1, 2 and 3
2 and 3
Question number: 31
Appeared in Year: 1999
In solidification of metal during casting, compensation for solid contraction is
Achieved by properly placed risers
Obtained by promoting directional solidification
Provided by the oversize pattern
Made by providing chills
Question number: 32
Appeared in Year: 2000
Which one of the following statements is correct?
No flux is used in gas welding of mild steel
Borax is the commonly used flux coating on welding electrodes
Laser beam welding employs a vacuum chamber and thus avoids use of a shielding method
AC can be used for GTAW process
Question number: 33
Appeared in Year: 2008
Submerged arc welding is not recommended for high carbon steels, tool steels, aluminium, magnesium etc.
This is because of unavailability of suitable fluxes, reactivity at high temperatures and low sublimation temperatures.
|a.||Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ|
|b.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|
|c.||Both Ꭺ and Ꭱ are false|
|d.||Ꭺ is true but Ꭱ is false|