Casting Methods Materials Degassing Online Exam Quiz
Casting Methods Materials Degassing GK Quiz. Question and Answers related to Casting Methods Materials Degassing. MCQ (Multiple Choice Questions with answers about Casting Methods Materials Degassing
Which of the following gases is used in the method of recirculation degassing?
Options
A : Hydrogen
B : Nitrogen
C : Argon
D : Oxygen
Which of the following formulas is used for determining the circulation rate (R) in recirculation degassing?
Options
A : R = 1.42*103*Q1/3*d1/3*{ln(P1/P2)}
B : R = 2.42*103*Q1/3*d1/3*{ln(P1/P2)}
C : R = 5.14*103*Q1/3*d1/3*{ln(P1/P2)}
D : R = 7.42*103*Q1/3*d1/3*{ln(P1/P2)}
Degassing can be carried out by placing ladle containing liquid metal under vacuum.
Options
A : True
B : False
C :
D :
Excess of nitrogen in molten casting can cause embrittlement of casting components.
Options
A : True
B : False
C :
D :
In vacuum treatment of molten metal, temperature of the melt can be decreased.
Options
A : True
B : False
C :
D :
The effect of temperature change is generally neglected during the vacuum degassing process.
Options
A : True
B : False
C :
D :
In vacuum degassing method, low viscosity is considered to have negative influence on the reaction rate.
Options
A : True
B : False
C :
D :
The effectiveness of vacuum treatment is reduced by the increase in surface area of the molten metal exposed to vacuum.
Options
A : True
B : False
C :
D :
The presence of hydrogen in molten casting strengthens the casting components.
Options
A : True
B : False
C :
D :
The term degassing is basically employed for optimizing the use of materials used in production of casting components.
Options
A : True
B : False
C :
D :
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