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SSC JE 2019-20: Technical Quiz 1
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Question 1
20 amperes of current flows through a resistor of 10 ohms for 2 seconds. The entropy change of surroundings if atmospheric temperature is 27°C is ________ .
Question 2
A reversible heat engine rejects 50 percent of the heat supplied during a cycle of operation. If this engine is reversed and operates as a heat pump, then what is its coefficient of performance?
Question 3
The process of decomposing martensitic structure, by heating martensitic steel below its critical temperature is called as _______
Question 4
The gross head on a turbine is 330m and the length of penstock is 420m. The diameter of penstock is 0.7m and water flows at the rate of 5m/s. Calculate the net head on the turbine if the coefficient of friction is 0.007. (take g =10m/s2)
Question 5
The head loss in turbulent flow in pipe varies
Question 6
Maximum shear stress in a Mohr’s circle
Question 7
A cylindrical vessel with flat bottom can be deep drawn by
Question 8
A composite wall having three layers of thickness 0.3 m, 0.2 m and 0.1 m and of thermal conductivities 0.6, 0.4 and 0.1 W/mK respectively is having surface area 1 m2. If the inner and outer temperature of the composite wall are 1840 k and 340 k , respectively, what is the rate of heat transfer?
Question 9
The ratio of net work obtained to the positive work in a Brayton cycle is 0.54. What is the back work ratio of this cycle?
Question 10
The ratio of the diameter of rivet hole to the pitch of rivet is 0.25, then the tearing efficiency of the joint is
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ESE & GATE MEGeneralJul 14ESE & GATE ME
