- Die casting method
- Slush casting method
- Permanent mould casting method
- Centrifugal casting method
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A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will?
Answer: Option 1 The metal ball can be considered to be made up of several layers of thinner ones. On heating each of these layers will increase in radius. As...
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What will be the output class A{ static void method(){ System.out.println("Class A method"); } } class B extends A{ static void method(){ System.out.println("Class B method"); } } public class Test{ public static void main(String args[]){ A a = new B(); a.method(); } }?
Answer: Option 1 Overriding in Java simply means that the particular method would be called based on the run time type of the object and not on the compile time...
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What will be the output interface A{ public void method(); } class One{ public void method(){ System.out.println("Class One method"); } } class Two extends One implements A{ public void method(){ System.out.println("Class Two method"); } } public class Test extends Two{ public static void main(String[] args){ A a = new Two(); a.method(); } }?
Answer: Option 2 Let'
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Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)?
Answer: Option 4 Let'
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Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
Answer: Option 1 Silicon is the impurity in cast iron which promotes graphite nodule formation and increases the fluidity of the molten metal.
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Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as?
Answer: Option 1 Let'
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Which of the following welding method uses a pool of molten metal?
Answer: Option 2 This is a well established and extremely versatile method of welding. Submerged-arc welding (SAW) involves the formation of an arc between a continuously fed electrode and the...
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A casting defect which results in general enlargement of a casting is known as?
Answer: Option 3 A swell occurs when the mold wall gives way across a whole face, and is caused by an improperly rammed mold. Burn-on occurs when metallic oxides interact...
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A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as?
Answer: Option 2 A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as Sand wash
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