Hardness of green sand mould can be increase by _____(a) increase in permeability(b) decrease in permeability(c) increase in moisture content beyond 6 percent(d) increase in both moisture content and permeabilityThis question was addressed to me in an online quiz.My doubt is from Green Sand Mould topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Hardness of green sand mould can be increase by _____(a) increase in p

1.	Hardness of green sand mould can be increase by _____(a) increase in permeability(b) decrease in permeability(c) increase in moisture content beyond 6 percent(d) increase in both moisture content and permeabilityThis question was addressed to me in an online quiz.My doubt is from Green Sand Mould topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
Answer» The correct CHOICE is (b) DECREASE in permeability The best I can explain: A decrease in permeability usually indicates a closed structure in the RAMMED sand, and if the decrease continues, it will lead to TIGHTER packing and fewer voids hence increase in hardness of the green sand mould. This increase in hardness can be measured by mould hardness tester.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following reasons stand for the crumbling of green sand mould?(a) The sand grains are not adequately bonded(b) Excess of water and clay mixture(c) Due to the presence of impurities in the green sand mould(d) Fine grain sizeI have been asked this question in class test.I need to ask this question from Green Sand Mould in division Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
In solidification of a riser, which of the following cannot be used for insulation?(a) Insulation powder(b) Insulation sleeve(c) Insulation pad(d) Insulation clipThis question was posed to me at a job interview.My question is based upon Types of Risers in division Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
Which of the following materials has superior strength and rigidity at high elevated temperature?(a) Aluminium-based alloys(b) Copper-based alloys(c) Zinc-based alloys(d) Nickel-based alloysI have been asked this question in homework.I would like to ask this question from Directional Solidification topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
Why large or complex castings require multiple in-gates?(a) To make smooth surface finish of the casting(b) To make uniform flow(c) To have high strength of the casting(d) To have good toughness of the castingThis question was addressed to me in examination.The above asked question is from Gating Design in division Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
Which of the following gates is used for making stove plate castings?(a) Edge gate(b) Wedge gate(c) Ring gate(d) Finger gateI have been asked this question during an internship interview.This interesting question is from Functions of Gating Systems topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
When would dross and slag tend to float on the metal surface?(a) When pouring basins are doubled(b) When pouring basins are made large(c) When pouring basins are made small(d) When pouring basins are removedI had been asked this question during an interview.The above asked question is from Functions of Gating Systems topic in portion Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
When do we need more number of risers during casting?(a) Feeding distance is low(b) Feeding distance is high(c) Thermal conductivity of mold is high(d) Fluidity of molten metal is highI had been asked this question in an online interview.My doubt stems from Riser Design in portion Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
With an increase in the initial volume, how does it affect the efficiency of the riser?(a) Increases(b) Decreases(c) Will not change(d) No relationThis question was addressed to me in examination.My doubt stems from Types of Risers in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
External chills can be used again and again.(a) True(b) FalseThe question was posed to me in homework.The question is from Functions of a Riser topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I
Which of the following methods is used for trapping the slag from entering steel casting into the mould?(a) Finn’s method(b) Down gate method(c) Whirl gate method(d) Euler’s methodThis question was addressed to me by my college director while I was bunking the class.I'd like to ask this question from Gating Design topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment