Questions without answers in Materials, Manufacturing and Industrial Engineering

In relation to metal casting defects, match the followingDefectDescription$\mathrm{P}$Dross$\mathrm{I}$Shallow blow found on a flat casting surface$\mathrm{Q}$Scab$\mathr...

Which one of the following options is NOT an error associated with STereoLithography (STL) file in additive manufacturing?Staircase effectMissing facetNon-manifold topolo...

A work piece is to be firmly held in a fixture. It is to be machined by using a plain slab milling cutter as shown in the figure below.Which one of the following options ...

A two-dimensional surface profile is obtained over a sampling length by using a contact type stylus profilometer as shown in the figure below. A line AA parallel to the g...

Consider the Euler variables of polyhedral objects namely, $\text{P1, P2, P3,}$ and $\text{P4}$ as given in the table below.\[\begin{array}{|c|c|c|c|c|c|c|}\hline\text{Po...

An objective function $Z$ of primal variables ( $x_{1}$ and $x_{2}$ ) is described below:\[\begin{array}{ll}\text { Minimize } Z= & 0.07 x_{1}+0.05 x_{2} \\\text { subjec...

Four jobs are on order in a factory. As on day $20$ of the production calendar, the corresponding due date and work remaining to complete these jobs (in days) are given i...

In a deep drawing operation of a rectangular sheet metal, $30\%$ stretching in length results in $15\%$ reduction in thickness. Assuming volume constancy, the normal anis...

The actual demand for castings in a factory is $500$ units and $635$ units for the months of January $2026$ and February $2026$, respectively. The forecasted demand for J...

The inventory holding cost of an item is ₹ $0.50$ per unit per month and the ordering cost per order is ₹ $550$. A stockist needs to supply $10000$ units of the item per ...

A metal has $\text{FCC}$ crystal structure with $2.71 \mathrm{~g} / \mathrm{cm}^{3}$ of density and $26.98 \mathrm{~g} / \mathrm{mol}$ of atomic weight. The Avogadro's nu...

During orthogonal turning by using a single point cutting tool, feed rate is $0.24 \mathrm{~mm} / \mathrm{rev}$. The uncut chip thickness is $0.23$ mm. The shear angle, t...

A drill bit during its lifetime can produce $150$ through holes in a plate at a drill-speed of $200$ RPM. If the drill-speed increases to $300$ RPM , then it can produce ...

The activities of a PERT network and their corresponding activity time estimates (in weeks) i.e., optimistic ( $t_{o}$ ), most likely ( $t_{m}$ ), and pessimistic ( $t_{p...

​​​​​Among the following surface hardening processes, steel is heated to the lowest temperature incarburizingcyanidingnitridingcarbonitriding

​The welding process commonly used for fabricating tailor-welded blanks of dissimilar thickness for automotive applications isgas weldinglaser weldingarc weldingfriction ...

A liquid metal is poured in a mold cavity of size $200 \mathrm{~mm} \times 200 \mathrm{~mm} \times 200 \mathrm{~mm}$. The cooling is uniform in all directions with NO add...

​​​​​Match the mold elements in the casting process with the most suitable functionMold elementFunctionPBlind riserICasting with internal cavityQChillIIMolten metal reser...

​​​​​Wire drawing operation is performed on a perfectly plastic metal without any strain hardening. Assuming no friction and no redundant work, the maximum possible perce...

​​​​​In relation to additive manufacturing, match the followingProcessLayer creation techniqueMaterialPStereolithography1Injection of powder streamIPaperQFused deposition...

​​​​​A plate of $30 \: mm$ thickness is fed through a rolling mill with two powered rolls. Each roll has a diameter of $500 \: mm$. The plate thickness is to be reduced t...

Two metal parts (a cylinder and a cube) of same volume are cast under identical conditions. The diameter of the cylinder is equal to its height. The ratio of the solidifi...

Cylindrical workpieces of diameter $60 \: mm$ and length $400 \:mm$ are machined on a lathe at a cutting speed of $25 \mathrm{~m} \mathrm{~min}^{-1}$ and a feed of $0.2 ...

A company uses $3000$ units of a part annually. The units are priced as given in the table below. It costs ₹ $150$ to place an order. Carrying costs are $40$ percent of t...

A project involves eight activities with the precedence relationship and duration as shown in the table below. The slack for the activity $D$ is _________ hours (answer i...

​​​​​The phases present in pearlite areaustenite and ferritecementite and austeniteferrite and cementitemartensite and ferrite

​​​​The "Earing" phenomenon in metal forming is associated withdeep drawingrollingextrusionforging

​​​​The grinding wheel used to provide the best surface finish is$\mathrm{A} 36 \mathrm{~L} 5 \mathrm{~V}$$\mathrm{A} 54 \mathrm{~L} 5 \mathrm{~V}$$\mathrm{A} 60 \mathrm{...

​​​​The allowance provided to a pattern for easy withdrawal from a sand mold isfinishing allowanceshrinkage allowancedistortion allowanceshake allowance

​​​​The most suitable electrode material used for joining low alloy steels using Gas Metal Arc Welding $\text{(GMAW)}$ process iscoppercadmiumlow alloy steeltungsten