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BARC ME Live Quiz Session Solution (@ 21st March)

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Question 1

A heat pump for domestic heating operates between a cold system at 0 °C and hot system at 60 °C, what is the minimum electric power consumption (in kW) if the heat rejected is 80000 kJ/hr?

Question 2

If the stream function is given by $Description: Description:ISROME2009_files\image005.png$ , then the velocity at a point (2,3) will be

Question 3

The figure shows a state of plane stress. If the minimum principal stress is –7 MPa, then what is the value of σ_x?

Question 4

A spur gear system is used to connect a reciprocating pump and an electric motor. The distance between the shaft is 500 mm. Electric motor is running at 900 rpm and required speed of pump is 200 rpm. Pitch line velocity of pump gear is _______ m/s.

Question 5

A cast-iron work-piece was machined along its length on a Shaper machine, The dimensions of work-piece is length 150 mm, width 50 mm, and height 20 mm. If the cutting force required is 1000 N, determine the power consumed per stroke if the operation is carried at 50 strokes/min.

Question 6

A solid sphere of radius r₁ = 20 mm is placed concentrically inside a hollow sphere of radius r₂ = 30 mm as shown in the figure.

The view factor F₂₁ for radiation heat transfer is

Question 7

A swimmer can swim 10 km in 2 hours when swimming along the flow of a river, While swimming against the flow. She takes 5 hours for the same distance. Her speed in still water (in km/h) is _______

Question 8

A carnot refrigerator operates between the thermal reservoirs at -25⁰C and 35⁰C. If the capacity of the unit s 5 tons of refrigeration, determine the power consumed by the refrigerator ________(in kW).

Question 9

The supply at three sources is 50, 40 and 60 units respectively whilst the demand at the four destinations is 20, 30, 10 and 50 units. In solving this transportation problem

Question 10

For the differential equation of particle
20x^,,+ 5x^, + 30x =0
The ratio of consecutive amplitude will be____________.

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ESE & GATE ME General

Feb 16ESE & GATE ME