Production and Industrial Engineering
GATE PI topic:production-engineering PYQs
Build your understanding with focused practice from past exam papers.
Questions 481–490 of 650. Imported answers require independent review unless marked reviewed.
Question 16
Open questionPIMCQ1 markNeeds review
REL chart is used in
Your answerChoose one option.
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A metallic rod of diameter
is subjected to the tensile test. The engineering stress and the true stress at fracture are 800 MPa and 900 MPa, respectively. The ratio of the rod diameter at fracture
to the initial diameter
is _____ (round off to 2 decimal places)Log in to check the answer
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A heat pump is to supply heat at the rate of 10 kW to a building to be maintained at 22 °C. The outside temperature is 2 °C. The minimum power (in kW) required to run the heat pump is _____ (round off to 2 decimal places)
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One kilogram of air is compressed at constant temperature of 150 °C until its volume is halved. Considering gas constant
kJ/kg-K for air, magnitude of heat rejected (in kJ) in the compression process is _____ (round off to 2 decimal places)Log in to check the answer
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For the abrasive jet machining process, the ratio of abrasive volume to carrier gas volume is 0.25. Further, the ratio of abrasive density to carrier gas density is 25. The mass ratio of abrasive to the mixture of abrasive and carrier gas is _____ (round off to 2 decimal places)
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In a typical turning tool life test, the following data are generated for tools A and B:
Tool name | Cutting speed (m/min) | Tool life (min) |
|---|---|---|
A | 200 | 20 |
B | 150 | 58 |
Assuming the same tool life exponent for the tools, the value of constant in the Taylor’s tool life equation (with cutting speed in m/min and tool life in min) is _____ (round off to 2 decimal places)
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The average proportion non-conforming of 20 samples each of size 100 items is 0.12. The upper control limit for the relevant chart is _____ (round off to 2 decimal places)
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For a process which is in a state of statistical control (within
), estimated process standard deviation (
) is 3 mm. The specification limits for the corresponding product are 100 ± 7 mm. The capability ratio
is _____ (round off to 3 decimal places)Log in to check the answer
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In a work study experiment, normal time was recorded as 140 s with a rating of 100%. Considering 2% allowance, the standard time (in s) is _____ (round off to 1 decimal place)
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A warehouse has 1 loading dock and 3 persons for loading operations. The arrival rate of trucks follows Poisson distribution with a mean of 4 trucks/hour. The average loading time (by three persons together) per truck is exponentially distributed with a mean of 10 minutes. The charge of the trucks per hour and loading charges per person per hour are Rs.20 and Rs.6, respectively. The total cost (in Rs./hour) is _____
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