GATE MT format:msq PYQs & Answers — Page 4

Questions 31–39 of 39. Imported answers require independent review unless marked reviewed.

Compared to top gating, the effect(s) of bottom gating in sand mold casting is/are

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reduced melt oxidation

reduced mold erosion

enhanced melt oxidation

enhanced mold erosion

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Choose the correct statement(s) in the context of fusion welding of austenitic stainless steel containing about 0.06 wt.% carbon.

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Corrosion resistance of heat affected zone is poorer than base material.

Corrosion resistance of heat affected zone is superior than fusion zone.

Corrosion resistance of heat affected zone is same as fusion zone.

Corrosion resistance is same for fusion zone, heat affected zone, and base material.

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In continuous casting of steel, mould flux is used for _______

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lubrication

reducing heat loss

inclusion control

reducing solidification shrinkage

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Identify the correct statement(s) with respect to the role of nickel as an alloying element in steels.

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It increases the M_s temperature

It is an austenite stabiliser

It decreases the M_s temperature

It is a carbide former

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While designing a material for high temperature application, which of the following characteristic(s)/attribute(s) is(are) desirable for achieving better creep resistance?

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Fine grain size

FCC crystal structure

High melting point

Cold worked microstructure

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Given the strain rate (

), dislocation density (

), dislocation velocity (

), which of the following relation(s) is(are) correct? Assume that Orowan equation for plastic flow due to the dislocation movement is obeyed.

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Which of the following statement(s) is(are) TRUE about black body radiation?

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Among all radiation emitted by an ideal black body at room temperature, the most intense radiation falls in the visible light spectrum

The total emissive power of an ideal black body is proportional to the square of its absolute temperature

The emissive power of an ideal black body peaks at a wavelength

which is inversely proportional to its absolute temperature

The radiant energy emitted by an ideal black body is greater than that emitted by the non-black body at all temperatures above 0 K

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Which of the following parameter(s) influence(s) the melting rate of the consumable wire in a gas metal arc welding process?

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Stick-out length

Weld speed

Welding current

Diameter of the consumable wire

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A non-rotating smooth solid spherical object is fixed in the stream of an inviscid incompressible fluid of density

(see figure). The flow is horizontal, slow, steady, and fully developed far from the object as shown by the stream arrows near point O. Which of the following statement(s) is(are) TRUE?

(Note: B is the center of the sphere and the straight horizontal line OAB intersects the surface of the sphere at the point A.)

Diagram for Metallurgical Engineering question 45

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The velocity of the fluid at the point A is zero

The fluid pressure at the point A exceeds that at point O by the amount

, where

is the fluid velocity at point O

Fluid moving precisely along OA will turn perpendicular to OA to circumvent the object

On each side of the central streamline OA, the flow will be deflected round the object

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GATE MT format:msq PYQs

Question 52

Question 53

Question 30

Question 31

Question 32

Question 33

Question 43

Question 44

Question 45