Q$1$a: Mark $\backslash ([\backslash$sqrt$\{\}]\backslash )$ or $\backslash ([\backslash$mathrm$\{$X$\}]\backslash )$ as appropriate against each of the following:

$1.$ The Heat treatment is the controlled heating and cooling of metals to alter their mechanical properties without changing the product shape.

$2.$ Carburizing is a process of adding Nitrogen to the surface. This is done by exposing the part to a Nitrogen rich atmosphere at an elevated temperature

$3.$ Air quenching entails the least risk of excessive distortion and gives a good surface finish

$4.$ If steel had high carbon and is heated in a carbon free furnace, the carbon will tend to diffuse out of steel resulting in carburization

$5.$ Springback is the elastic recovery of the sheet metal after bending.

$6.$ The feature that distinguishes fusion welding processes from solid state welding is that melting of the faying surfaces occurs during fusion welding

$7.$ The shielded metal arc welding is an arc welding process that uses a consumable electrode

$8.$ In brazing, the base metals melt at temperatures below $\backslash (450^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ while in soldering they melt at $\backslash (450^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ or above

$9.$ In the friction welding process, two parts $($cylindrical shape$)$ are brought in contact by a friction pressure when one of them rotates.

$10.$ The friction stir welding can be used for welding the similar metals but cannot be used for the dissimilar metals.

Q$1$b Multiple Choices

$1.$ The cutting force in a blanking depends on which mechanical property of the sheet metal?

$($a$)$ compressive stress,

$($b$)$ shear stress,

$($c$)$ yield stress.

$2.$ Which of the following process are examples of generating the workpart geometry in machining, as compared to forming the geometry $($more than one$)?$

$($a$)$ broaching,

$($b$)$ contour turning,

$($c$)$ drilling,

$($d$)$ profile milling.

$3.$ Which of the three types of chip would be expected in a turning operation conducted at low cutting speeds on a brittle work material?

$($a$)$ discontinuous,

$($b$)$ continuous,

$($c$)$ continuous with built$-$up edge.

$4.$ Hot working of metals refers to which one of the following temperature regions relative to the melting point of the given metal on an absolute temperature scale?

$($a$)$ Room temperature,

$($b$)\backslash (0\mathrm{.}2\backslash$mathrm$\{$~T$\}\_\{\backslash$mathrm$\{$m$\}\}\backslash ),$

$($c$)\backslash (0\mathrm{.}4\backslash$mathrm$\{$~T$\}\_\{\backslash$mathrm$\{$m$\}\}\backslash ),$

$($d$)\backslash (0\mathrm{.}6\backslash$mathrm$\{$~T$\}\_\{\backslash$mathrm$\{$m$\}\}\backslash ).$

$5.$ Which of the following processes are classified as fusion welding $($more than one$)?$

$($a$)$ Friction welding,

$($b$)$ Shield metal arc welding,

$($c$)$ gas welding,

$6.$ Solid state welding is a process where the metals are welded together by bringing them to the $\backslash (\backslash$ldots $\backslash$ldots $\backslash$ldots $\backslash$ldots $\backslash )$ at the surfaces to be joined while pressing them together.

$($a$)$ Plastic state $($without melting$)$

$($b$)$ Plastic state $($with melting$)$

$7.$ Which of the following is an advantage of brazing:

$($a$)$ less heat and energy required,

$($b$)$ stronger joint than welding.

$8.$ In shielded metal arc welding, the end of electrode and molten pool protected by $.........$

$($a$)$ Flux coating

$($b$)$ Shield gas

$($c$)$ None of these

$9.$ Which one of the following arc welding processes uses non$-$consumable electrode?

$($a$)$ Flux$-$cored arc welding,

$($b$)$ Gas metal arc welding,

$($c$)$ Gas tungsten arc welding,

$($d$)$ Shielded metal arc welding.

$10.$ Which one of the following arc welding processes uses consumable electrode?

$($a$)$ Flux$-$cored arc welding,

$($b$)$ Gas metal arc welding,

$($c$)$ Gas tungsten arc welding,

$($d$)$ Shielded metal arc welding. Q$1$ Multiple Choices

$1.$ Which of the following is the correct definition of ultimate engineering tensile strength, as derived from the results of a tensile test on a metal specimen?

$($a$)$ the stress encountered when the stress$-$strain curve transforms from elastic to plastic,

$($b$)$ the maximum load divided by the final area of the specimen,

$($c$)$ the maximum load divided by the original area of the specimen,

$($d$)$ the stress observed when the specimen finally fails.

$2.$ The shear strength of a metal is usually

$($a$)$ greater than its tensile strength,

$($b$)$ less than its tensile strength

$3.$ The cutting force in a blanking operation depends on:

$($a$)$ compressive strength,

$($b$)$ modulus of elasticity,

$($d$)$ tensile strength,

$($e$)$ yield strength.

$($c$)$ shear strength,

$4.$ Which of the following casting processes are expendable mold operations $($more than one$)?$

$($a$)$ investment casting,

$($b$)$ Centrifugal casting,

$($c$)$ sand casting,

$($d$)$ die casting,

$($e$)$ permeneat mold casting

$($f$)$ shell molding.

$5.$ The total solidification time is proportional to which one of the following quantities.

$($a$)\backslash ((\backslash$mathrm$\{$A$\}/\backslash$mathrm$\{$V$\})^\{\backslash$mathrm$\{$n$\}\}\backslash ),$

$($b$)$ V $,$

$($c$)$ V$/$A$,$

$($d$)\backslash ((\backslash$mathrm$\{$V$\}/\backslash$mathrm$\{$A$\})^\{2\}\backslash ).$

$6.$ Total solidification time is defined as which one of the following?

$($a$)$ time between pouring and complete solidification,

$($b$)$ time between pouring and cooling to room temperature,

$($c$)$ time between solidification and cooling to room temperature,

$($d$)$ time to give up the heat of fusion

$7.$ Annealing is the process of raising the temperature to over $\backslash (50^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ above line A $3$ or line A $1,$ and then cooled to room temperature under:

$($a$)$ natural convection,

$($b$)$ forced $14.$ Which of the following welding processes applies hea