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GATE 2021 ME : Toppers Quiz 6 (App update required to attempt this test)

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Question 1

If a particle is in static equilibrium, then the work done by the system of force acting on that particle is:

Question 2

The voltage length characteristic of a direct current (dc) arc is given by
V = (20 + 40 L) Watts
Where, L is the length of the arc in cm. The power source characteristic is approximated by a straight line with an open circuit voltage = 80 V and a short circuit current = 1000 amp. The optimum arc length is _________ (in cm).

Question 3

Find the increase in unavailable energy associated with transfer of 800kJ of heat from a constant temperature system at 600K to another constant temperature at 400K. The ambient temperature is 300K.

Question 4

The phenomenon of slow extension of materials having constant load, i.e. increasing with the time is called

Question 5

Determine the final volume (in mm³) of steel bar which has 4 m length, 30 mm wide and 20 mm thick and which has an axial pull of 30 kN in the direction of its length. Take, E= 2×10⁵ N/mm² and Poisson’s ratio is 0.3

Question 6

In a Bell Coleman refrigeration cycle, air enters the compressor at atmospheric pressure and 280K with a flow rate of 2.2 m³/s. The pressure ratio is 4 and the inlet turbine temperature is 340K. The refrigeration capacity is _______TR.

Question 7

A column (E= 200GPa) fixed on both ends, its height is 1m and cross-section is 15mm×30mm. Critical buckling load in kN which the column withstands____________

Question 8

In the counter flow heat exchange, for the hot fluid the specific heat is 3 kJ/kg K, mass flow rate is 6 kg/s, inlet temperature is 150 °C and outlet temperature is 100 °C. For the cold fluid, the specific heat is 3 kJ/kg K, mass flow rate is 8 kg/s, inlet temperature is 20 °C . Neglecting the heat transfer to surrounding, the outlet temperature of the cold fluid in °C is ________.

Question 9

A 30 cm diameter Horizontal Pipe terminates in a nozzle with exit diameter of 5 cm. If water flows through the Pipe at a rate of 0.2 m³/s. What force (in MN) will be exerted by fluid on nozzle.

Question 10

If x is the distance measured from the leading edge of a flat plate, the laminar boundary layer thickness varies as

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ESE & GATE ME General

Mar 26ESE & GATE ME