GATE PI format:nat PYQs & Answers — Page 27

Questions 261–264 of 264. Imported answers require independent review unless marked reviewed.

Topic practice 264 questionsPage 27 of 27

An electron beam welding process uses 15 mA beam current at an accelerating voltage of 150 kV. The energy released per second by the beam (in J) is (up to one decimal place). (1 Ampere = 6.28 × 10

electrons per second, 1 eV = 1.6 × 10

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A hose coupling manufacturing company has production capacity of 2,500 units per year. The unit selling price of the item is Rs. 150. The fixed cost of production is Rs. 80,000 and variable cost of production per unit is Rs. 70. If the company wishes to achieve a profit of Rs. 20,000 during the calendar year, then the minimum quantity to be produced is

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In a machining operation with turning tool, the tool life (

) is related to cutting speed

(m/s), feed

(mm) and depth of cut

(mm) as

where, C is a constant. The suggested values for the cutting parameters are:

= 1.5 m/s,

= 0.25 mm and

= 3 mm for normal rough turning. If the operation is performed at twice the cutting speed and the other parameters remain unchanged, the corresponding percentage change in tool life is __________.

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The annual demand of wrist watches produced on an assembly line is 1,03,125 units. The line operates 50 weeks/year, 5 shifts/week and 7.5 hours/shift. The uptime efficiency of the line is 99%. The cycle time (

) of the assembly line (in minutes/unit) is __________ (up to two decimal places).

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GATE PI format:nat PYQs

Question 48

Question 50

Question 53

Question 54