Production and Industrial Engineering
GATE PI topic:manufacturing PYQs
Build your understanding with focused practice from past exam papers.
Questions 111–120 of 650. Imported answers require independent review unless marked reviewed.
Question 46
Open questionPINAT2 marksNeeds review
In a cold rolling process without front and back tensions, the required minimum coefficient of friction is 0.04. Assume large rolls. If the draft is doubled and roll diameters are halved, then the required minimum coefficient of friction is________. (Rounded off to two decimal places)
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In a direct current arc welding, the voltage V (in volt) is related to the arc length l (in cm) as
The open circuit voltage is 80 volts. The maximum possible arc length (in cm) is________. (Rounded off to two decimal places)
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A worker is allowed half an hour personal time in a normal 8-hour shift. If the normal time for manufacturing a product is 5 minutes, the standard time (in second) is________. (Answer in integer)
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A product has to be manufactured in a single-line layout by carrying out the six tasks in a sequence. The time (in minute) of the six sequential tasks are 37, 8, 19, 34, 36 and 17. These tasks cannot be further sub-divided. For minimizing the cycle time, the number of stations to be used is________. (Answer in integer)
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A through hole of 10 mm diameter is to be drilled in a mild steel plate of 30 mm thickness. The selected spindle speed and feed for drilling hole are 600 revolutions per minute (RPM) and 0.3 mm/rev, respectively. Take initial approach and breakthrough distances as 3 mm each. The total time (in minute) for drilling one hole is________. (Rounded off to two decimal places)
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In the iron-carbon equilibrium phase diagram, the eutectoid reaction occurs at 723 °C with the eutectoid composition of 0.83 weight % carbon. Ferrite and cementite phases are considered to contain 0.022 weight % carbon and 6.67 weight % carbon, respectively. If a steel specimen with 0.7 weight % carbon is cooled from 950 °C to below 723 °C, the fraction of eutectoid ferrite is________. (Rounded off to two decimal places)
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During orthogonal cutting with a tool of 10° rake angle, the cutting and thrust forces are 900 N and 275 N, respectively. The coefficient of friction on the rake surface of the tool is________. (Rounded off to two decimal places)
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In casting a cube of 80 mm side, the volumetric shrinkages due to solidification and solid contraction are 4.5% and 2%, respectively. Assume uniform cooling in all directions. The side (in mm) of the cube pattern for getting the required size casting is________. (Rounded off to two decimal places)
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The solidification of a casting starts at 10 AM. However, the solidification of the molten metal at the center-line of the mold starts at 10:03 AM and ends at 10:10 AM. The casting is considered solidified completely when the solidification is completed at the center-line of the mold. The center-line feeding resistance (CFR) in percentage is________. (Answer in integer)
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A link OA of length 200 mm is rotating counter clockwise about O in x-y plane with a constant angular velocity of 100 rad/s, as shown in the figure. The absolute value of the x-component of the linear velocity (in m/s) of point A at the instant shown in the figure is________. (Rounded off to one decimal place)
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