Mold Materials MCQs : Here you will find MCQ Questions related to "Mold Materials" in Casting, Forming & Welding. These Mold Materials MCQ Questions Will help you to improve your Casting, Forming & Welding knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.
Which materials are used for making molds?
C. Both A and B
D. None of the above
Explanation: Both metallic as well as non-metallic materials are used for making molds.
Which of the following material has a very low refractoriness?
D. Valcanised rubber
Explanation: Valcanised rubber has a very low refractoriness, hence, using valcanised rubber for making molds can cause damage to the mold cavity or metallic structure so formed.
High refractoriness of a material refers to its __________
A. Slipperyness of the material
B. Chemical strength towards other material
C. Strength to withstand at high temperature
D. Ability to get dissolved in molten metal
Explanation: Refractoriness is the resistance to self deformation at high working temperatures. A material must possess such property in order to withstand the temperature of molten metal during casting.
__________ is one type of clay used in moulding sand as a binder.
Explanation: Bentonite is one type of clay used in moulding sand as a binder.
Which of the following is a perfect composition of clay (Bentonite) used in moulding sand?
Explanation: Its chemical formula is represented as Al2O3.2SiO2.2H2O.
Which of the following material is not used for mold making?
C. Mild Steel
D. Alloy Steel
Explanation: Zinc (Zn) has a very low melting point, making it non-dependable material to be used as the material for mold making.
Which of them has the ability to increase strength and hardness of steel material when added to it in the right compostion (2-4%).
Explanation: Phosphorus has the ability to increase strength and hardness of steel material when added to it in the right compostion (2-4%).
Which of the following is a perfect composition for medium carbon steel?
A. Upto 0.3%
Explanation: The sequence of composition is in order from low carbon steel to high carbon steel till 1.7% carbon. Medium carbon steel belongs to a region of 0.3-0.6% carbon.
Which of them is an alloying element and is not considered as additive?
Explanation: Zinc is an alloying element and is not considered as additive.
The famous iron pillar located near Qutab Minar in New Delhi is made up of which material?
A. Stainless steel
B. Malleable iron
C. Mild steel
D. Wrought iron
Explanation: Malleable iron is a raw kind of type of iron which was used in the making of Iron pillar.