Recent questions tagged materials-manufacturing-and-industrial-engineering / GO Mechanical

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GATE2016-3-21
Equal amounts of a liquid metal at the same temperature are poured into three moulds made of steel, copper and aluminum. The shape of the cavity is a cylinder with 15 mm diameter. The size of the moulds are such that the outside temperature of the moulds do ... , respectively.) Copper - Steel - Aluminum Aluminum - Steel - Copper Copper - Aluminum - Steel Steel - Copper - Aluminum

Equal amounts of a liquid metal at the same temperature are poured into three moulds made of steel, copper and aluminum. The shape of the cavity is a cylinder with 15 mm ...

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GATE2016-2-55
A project consists of $14$ activities, $A$ to $N$. The duration of these activities (in days) are shown in brackets on the network diagram. The latest finish time (in days) for node $10$ is __________

A project consists of $14$ activities, $A$ to $N$. The duration of these activities (in days) are shown in brackets on the network diagram. The latest finish time (in day...

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GATE2016-2-54
A food processing company uses $25,000 \:kg$ ... on an annual basis is $20\%$ of the purchase price of the corn flour per $kg$. The optimal order quantity (in $kg$) is _____________

A food processing company uses $25,000 \:kg$ of corn flour every year. The quantity-discount price of corn flour is provided in the table below:$$\begin{array}{|l|l|} \hl...

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GATE2016-2-51
For a certain job,the cost of metal cutting is $Rs$. $18C/V$ and the cost of tooling is $Rs$. $270C/(TV)$,where $C$ is a constant,$V$ is the cutting speed in $m/min$ and $T$ is the tool life in minutes.The Taylor's tool life equation is $VT^{0.25}$-$150$.The cutting speed (in $m/min$) for the minimum tool cost is

For a certain job,the cost of metal cutting is $Rs$. $18C/V$ and the cost of tooling is $Rs$. $270C/(TV)$,where $C$ is a constant,$V$ is the cutting speed in $m/min$ and ...

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GATE2016-2-50
The Voltage-length characteristics of a direct current arc in an arc welding process is $V=(100+40l)$ ,where $l$ is the length of arc in $mm$ and $V$ is arc voltages in volts.during a welding process,the arc length varies between $1$ and $2 \: mm$ and welding current is in range $200-250 \: A$.Assuming a linear power source,the short circuit current is_____$A$

The Voltage-length characteristics of a direct current arc in an arc welding process is $V=(100+40l)$ ,where $l$ is the length of arc in $mm$ and $V$ is arc voltages in v...

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GATE2016-2-49
Gray cast iron blocks of size $100mm\times 50mm\times 10mm$ with a central spherical cavity of diameter $4 \:mm$ are sand cast.The shrinkage allowance for the pattern is $3\%$.The ratio of the volume of the pattern to the volume of casting is

Gray cast iron blocks of size $100mm\times 50mm\times 10mm$ with a central spherical cavity of diameter $4 \:mm$ are sand cast.The shrinkage allowance for the pattern is...

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GATE2016-2-48
In a binary system of $A$ and $B$, a liquid of $20\% A (80\% \: B)$ is coexisting with a solid of $70\% \: A (30 \% B)$. For an overall composition having $40\% \: A$, the fraction of solid is $0.40$ $0.50$ $0.60$ $0.75$

In a binary system of $A$ and $B$, a liquid of $20\% A (80\% \: B)$ is coexisting with a solid of $70\% \: A (30 \% B)$. For an overall composition having $40\% \: A$,...

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GATE2016-2-25
In an ultrasonic machining (USM) process, the material removal rate (MRR) is plotted as a function of the feed force of the USM tool. With increasing feed force, the MRR exhibits the following behavior: increases linearly decreases linearly does not change first increases and then decreases

In an ultrasonic machining (USM) process, the material removal rate (MRR) is plotted as a function of the feed force of the USM tool. With increasing feed force, the MRR ...

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GATE2016-2-24
The following data is applicable for a turning operation. The length of job is $900$ $mm$, diameter of job is $200$ $mm$, feed rate is $0.25$ $mm/rev$ and optimum cutting speed is $300$ $m/min$. The machining time (in $min$) is __________

The following data is applicable for a turning operation. The length of job is $900$ $mm$, diameter of job is $200$ $mm$, feed rate is $0.25$ $mm/rev$ and optimum cutting...

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GATE2016-2-22
The welding process which uses a blanket of fusible granular flux is tungsten inert gas welding submerged arc welding electroslag welding thermit welding

The welding process which uses a blanket of fusible granular flux istungsten inert gas weldingsubmerged arc weldingelectroslag weldingthermit welding

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GATE2016-2-20
In a single-channel queuing model, the customer arrival rate is $12$ per hour and the serving rate is $24$ per hour. The expected time that a customer is in queue is _______ minutes.

In a single-channel queuing model, the customer arrival rate is $12$ per hour and the serving rate is $24$ per hour. The expected time that a customer is in queue is ____...

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GATE2016-1-54
The annual demand for an item is $10,000$ units. The unit cost is $Rs$. $100$ and inventory carrying charges are $14.4\%$ of the unit cost per annum. The cost of one procurement is $Rs$. $2000$. The time between two consecutive orders to meet the above demand is _______ month($s$).

The annual demand for an item is $10,000$ units. The unit cost is $Rs$. $100$ and inventory carrying charges are $14.4\%$ of the unit cost per annum. The cost of one proc...

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GATE2016-1-50
The tool life equation for HSS tool is $VT^{0.14}f^{0.7}d^{0.4}$ = constant. The tool life $(T)$ of $30 \: min$ is obtained using the following cutting conditions: $V=45\:m/min$, $f=0.35 \: mm$, $d=2.0 \: mm$ If speed $(V)$, feed $(f)$ and depth of cut $(d)$ are increased individually by $25\%$, the tool life (in $min$) is $0.15$ $1.06$ $22.50$ $30.0$

The tool life equation for HSS tool is $VT^{0.14}f^{0.7}d^{0.4}$ = constant. The tool life $(T)$ of $30 \: min$ is obtained using the following cutting conditions:$V=45\:...

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GATE2016-1-39
An inverted U-tube manometer is used to measure the pressure difference between two pipes $A$ and $B$ ,as shown in figure.pipe $A$ is carrying oil (specific gravity$=0.8$ ) and pipe $B$ is carrying water.The densities of air and water are $1.16 kg/m^3$ ... $A$ and $B$ is ________$kPa$. Acceleration due to gravity $g =10\:m/s^2$.

An inverted U-tube manometer is used to measure the pressure difference between two pipes $A$ and $B$ ,as shown in figure.pipe $A$ is carrying oil (specific gravity$=0.8$...

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GATE2016-1-25
Match the following: ... $P-III, Q-II, R-I, S-IV$ $P-IV, Q-II, R-I, S-III$ $P-IV, Q-I, R-II, S-III$

Match the following:$\begin{array}{|l|l|l|l|} \hline P. & \text{Feeler guage} & I. & \text{Radius of an object} \\ \hline Q. & \text{Fillet guage} & II. & \text{Diameter ...

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GATE2016-1-24
In an orthogonal cutting process the tool used has rake angle of zero degree. The measured cutting force and thrust force are $500 \: N$ and $250 \: N$, respectively. The coefficient of friction between the tool and the chip is _________

In an orthogonal cutting process the tool used has rake angle of zero degree. The measured cutting force and thrust force are $500 \: N$ and $250 \: N$, respectively. The...

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GATE2016-1-23
The non-traditional machining process that essentially requires vacuum is electron beam machining electro chemical machining electro chemical discharge machining electro discharge machining

The non-traditional machining process that essentially requires vacuum iselectron beam machiningelectro chemical machiningelectro chemical discharge machiningelectro disc...

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GATE2016-1-22
The part of a gating system which regulates the rate of pouring of molten metal is pouring basin runner choke ingate

The part of a gating system which regulates the rate of pouring of molten metal ispouring basinrunnerchokeingate

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GATE2016-1-21
Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that $T_{\text{welding}} > T_{\text{soldering}}> T_{\text{brazing}}$ ... $T_{\text{welding}} > T_{\text{brazing}} > T_{\text{soldering}}$

Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that$T_{\text{welding}} T_{...

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GATE2016-1-15
A plastic sleeve of outer radius $r_0=1$ $mm$ covers a wire (radius $r=0.5\:mm$) carrying electric current. Thermal conductivity of the plastic is $0.15 W/m-K$. The heat transfer coefficient on the outer surface of the sleeve exposed to air is ... . Due to the addition of the plastic cover, the heat transfer from the wire to the ambient will increase remain the same decrease be zero

A plastic sleeve of outer radius $r_0=1$ $mm$ covers a wire (radius $r=0.5\:mm$) carrying electric current. Thermal conductivity of the plastic is $0.15 W/m-K$. The heat ...

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GATE2015-3-35
In a CNC milling operation, the tool has to machine the circular arc from point $(20, 20)$ to $(10, 10)$ at sequence number $5$ of the CNC part program. If the center of the arc is at $(20, 10)$ ... R$10$ N $05$ G$90$ G$03$ X$20$ Y$20$ R$10$ N $05$ G$91$ G$02$ X$20$ Y$20$ R$10$

In a CNC milling operation, the tool has to machine the circular arc from point $(20, 20)$ to $(10, 10)$ at sequence number $5$ of the CNC part program. If the center of ...

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GATE2015-3-34
Orthogonal turning of a mild steel tube with a tool of rake angle $10^\circ $ is carried out at a feed of $0.14 mm/rev$. If the thickness of the chip produced is $0.28 mm$, the values of shear angle and shear strain will be respectively $28^\circ 20′$ and $2.19$ $22^\circ 20′$ and $3.53$ $24^\circ 30′$ and $4.19$ $37^\circ 20′$ and $5.19$

Orthogonal turning of a mild steel tube with a tool of rake angle $10^\circ $ is carried out at a feed of $0.14 mm/rev$. If the thickness of the chip produced is $0.28 mm...

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GATE2015-3-33
The annual requirement of rivets at a ship manufacturing company is $2000 \: kg$. The rivets are supplied in units of $1 \: kg$ costing $Rs. 25$ each. If it costs $Rs. 100$ to place an order and the annual cost of carrying one unit is $9\%$ of its purchase cost, the cycle length of the order (in days) will be ________

The annual requirement of rivets at a ship manufacturing company is $2000 \: kg$. The rivets are supplied in units of $1 \: kg$ costing $Rs. 25$ each. If it costs $Rs. 10...

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GATE2015-3-32
Ratio of solidification time of a cylindrical casting (height = radius) to that of a cubic casting of side two times the height of cylindrical casting is ________

Ratio of solidification time of a cylindrical casting (height = radius) to that of a cubic casting of side two times the height of cylindrical casting is ________

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GATE2015-3-31
In a rolling operation using rolls of diameter $500$ $mm$, if a $25$ $mm$ thick plate cannot be reduced to less than $20$ $mm$ in one pass, the coefficient of friction between the roll and the plate is ________

In a rolling operation using rolls of diameter $500$ $mm$, if a $25$ $mm$ thick plate cannot be reduced to less than $20$ $mm$ in one pass, the coefficient of friction be...

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GATE2015-3-26
The value of moment of inertia of the section shown in the figure about the axis-XX is $8.5050×10^6$ $mm^4$ $6.8850×10^6$ $mm^4$ $7.7625×10^6$ $mm^4$ $8.5725×10^6$ $mm^4$

The value of moment of inertia of the section shown in the figure about the axis-XX is$8.5050×10^6$ $mm^4$$6.8850×10^6$ $mm^4$$7.7625×10^6$ $mm^4$$8.5725×10^6$ $mm^4$...

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GATE2015-3-21
Which two of the following joining processes are autogeneous? Diffusion welding Electroslag welding Tungsten inert gas welding Friction welding (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (iii)

Which two of the following joining processes are autogeneous?Diffusion weldingElectroslag weldingTungsten inert gas weldingFriction welding(i) and (iv)(ii) and (iii)(ii) ...

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GATE2015-3-20
A drill is positioned at point P and it has to proceed to point Q. The coordinates of point Q in the incremental system of defining position of a point in CNC part program will be $(3, 12)$ $(5, 7)$ $(7, 12)$ $(4, 7)$

A drill is positioned at point P and it has to proceed to point Q. The coordinates of point Q in the incremental system of defining position of a point in CNC part progra...

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GATE2015-3-8
In the notation $(a/b/c) : (d/e/f)$ for summarizing the characteristics of queuing situation, the letters $‘b’$ and $‘d’$ stand respectively for service time distribution and queue discipline number of servers and size of calling source number of servers and queue discipline service time distribution and maximum number allowed in system

In the notation $(a/b/c) : (d/e/f)$ for summarizing the characteristics of queuing situation, the letters $‘b’$ and $‘d’$ stand respectively forservice time distr...

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GATE2015-3-7
In full mould (cavity-less) casting process, the pattern is made of expanded polystyrene wax epoxy plaster of Paris

In full mould (cavity-less) casting process, the pattern is made ofexpanded polystyrenewaxepoxyplaster of Paris

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GATE2015-3-6
In a machining operation, if the generatrix and directrix both are straight lines, the surface obtained is cylindrical helical helical surface of revolution

In a machining operation, if the generatrix and directrix both are straight lines, the surface obtained iscylindricalhelicalhelicalsurface of revolution

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GATE2015-2-55
A manufacturer has the following data regarding a product: Fixed cost per month = $Rs$. $50000$ Variable cost per unit = $Rs.$ $200$ Selling price per unit = $Rs$. $300$ Production capacity = $1500$ units per month If the production is carried out at $80\%$ of the rated capacity, then the monthly profit (in $Rs$.) is ____________

A manufacturer has the following data regarding a product:Fixed cost per month = $Rs$. $50000$Variable cost per unit = $Rs.$ $200$Selling price per unit = $Rs$. $300$Prod...

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GATE2015-2-52
A single point cutting tool with $0^\circ $ rake angle is used in an orthogonal machining process. At a cutting speed of $180$ $m/min$, the thrust force is $490$ $N$. If the coefficient of friction between the tool and the chip is $0.7$, then the power consumption (in $kW$) for the machining operation is ________

A single point cutting tool with $0^\circ $ rake angle is used in an orthogonal machining process. At a cutting speed of $180$ $m/min$, the thrust force is $490$ $N$. If ...

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GATE2015-2-51
During a TIG welding process, the arc current and arc voltage were $50$ $A$ and $60$ $V$, respectively, when the welding speed was $150$ $mm/min$. In another process, the TIG welding is carried out at a welding speed of $120$ $mm/min$ at the same arc voltage and ... so that weld quality remains the same. The welding current (in $A$) for this process is $40.00$ $44.72$ $55.90$ $62.25$

During a TIG welding process, the arc current and arc voltage were $50$ $A$ and $60$ $V$, respectively, when the welding speed was $150$ $mm/min$. In another process, the...

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GATE2015-2-50
The flow stress (in $MPa$) of a material is given by $\sigma =500\varepsilon ^{0.1}$, where $ε$ is true strain. The Young’s modulus of elasticity of the material is $200$ $GPa$. A block of thickness $100$ $mm$ made of this material is compressed to $95$ $mm$ thickness and then the load is removed. The final dimension of the block (in $mm$) is _________

The flow stress (in $MPa$) of a material is given by $\sigma =500\varepsilon ^{0.1}$,where $ε...

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GATE2015-2-49
In a two-stage wire drawing operation, the fractional reduction (ratio of change in cross-sectional area to initial cross-sectional area) in the first stage is $0.4$. The fractional reduction in the second stage is $0.3$. The overall fractional reduction is $0.24$ $0.58$ $0.60$ $1.00$

In a two-stage wire drawing operation, the fractional reduction (ratio of change in cross-sectional area to initial cross-sectional area) in the first stage is $0.4$. The...

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GATE2015-2-48
A cube and a sphere made of cast iron (each of volume $1000$ $cm^3$) were cast under identical conditions. The time taken for solidifying the cube was $4$ $s$. The solidification time (in $s$) for the sphere is __________

A cube and a sphere made of cast iron (each of volume $1000$ $cm^3$) were cast under identical conditions. The time taken for solidifying the cube was $4$ $s$. The solidi...

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GATE2015-2-25
Sales data of a product is given in the following table: ... value by moving average. Exponential smoothing will forecast a higher value compared to regression. Regression will forecast a higher value compared to moving average.

Sales data of a product is given in the following table:$\begin{array}{|l|l|l|l|l|l|} \hline \textbf{Month} & \text{January} & \text{February} & \text{March} & \text{Apri...

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GATE2015-2-24
Annual demand of a product is $50000$ units and the ordering cost is $Rs$. $7000$ per order. Considering the basic economic order quantity model, the economic order quantity is $10000$ units. When the annual inventory cost is minimized, the annual inventory holding cost (in $Rs$.) is _______

Annual demand of a product is $50000$ units and the ordering cost is $Rs$. $7000$ per order. Considering the basic economic order quantity model, the economic order quant...

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GATE2015-2-21
The primary mechanism of material removal in electrochemical machining (ECM) is chemical corrosion etching ionic dissolution spark erosion

The primary mechanism of material removal in electrochemical machining (ECM) ischemical corrosionetchingionic dissolutionspark erosion

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