Production and Industrial Engineering
GATE PI year:2023 PYQs
Build your understanding with focused practice from past exam papers.
Questions 61–65 of 65. Imported answers require independent review unless marked reviewed.
Question 61
Open questionPINAT2 marksNeeds review
In an ideal air-standard Brayton cycle, air enters the compressor at 100 kPa and 300 K. Thermal efficiency of the cycle is 50 %. The heat added to air is 100 kJ/kg. Air has constant specific heat
kJ/(kg-K) and
. Air temperature, in K, at the turbine inlet is _____ (round off to 2 decimal places).Log in to check the answer
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Open questionPINAT2 marksNeeds review
A key of width and height of 6 mm each is used to fix a gear on a shaft of 20 mm diameter. The shaft is used to transmit 10 kW power at 600 rpm to the gear. Permissible shear stress in the key is 80 N/mm², while compressive stress in the key is neglected. The minimum length of the key, in mm, is _____ (round off to 2 decimal places).
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Open questionPINAT2 marksNeeds review
A cylindrical casting has 10 cm diameter and a mass of 12.56 kg. The material density is 7.85 × 10⁻³ kg/cm³. The value of exponent ‘n’ is 2 and solidification time is 12 min. The Chvorinov’s constant, in min/cm², is _____ (round off to 2 decimal places).
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Open questionPINAT2 marksNeeds review
A pair of spur gears is designed to transmit 20 kW power at a pitch line velocity of 10 m/s. Diameter of the driving gear is 0.5 m. The tangential force, in N, between the driver and the driven gear is _____(in integer).
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Open questionPINAT2 marksNeeds review
Two products, P and Q, are sold in the ratio of 10:1. The fixed cost is Rs. 1,40,000. The selling price of P is Rs. 10/unit and Q is Rs. 40/unit. The variable costs of P and Q are Rs. 5/unit and Rs. 20/unit, respectively. The break-even point in terms of revenue, in Rs., is _____(in integer).
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