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ISRO ME Exam 2017: Full Syllabus Mini Mock-6

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Question 1

A solar collector receiving solar radiation at the rate of 0.6 kW/m² transforms it to the internal energy of a fluid at an overall efficiency of 50%. the fluid heated to 350 K is used to run a heat engine which rejects heat at 313 K. If the heat engine is to deliver 2.5 kW power, the minimum area of the solar collector required would be, nearly:

Question 2

A 25 cm long prismatic homogeneous solid floats in water with its axis vertical and 10 cm projecting abovbe water surface. If the same solid floats in some oil with its axis vertical and 5 cm projecting above the liquid surface, then the specific gravity of the oil is

Question 3

A block of 100 N is kept on inclined plane which makes an angle 30 ° with horizontal. Find the component of weight parallel to inclined plane ?

Question 4

In Nichrome-60 wire, what will be percentage distribution of silicon in the wire?

Question 5

Consider the following statements:
1) Heat treatment is effective only in case of certain alloys.
2) Cooling rate is an important factor in any heat treatment process.
3) The temperature at which the change starts on heating the steel is called lower critical temperature.
Which of the above statements are correct?

Question 6

A bus and a car, both are moving on curved horizontal road having radius 120 m with car speed as 30 m/s. A bus is moving ahead of the car from which a person analyse that the rotating masses of the car engine has an angular speed of 120 rad/s in towards clockwise direction. What will be the gyroscopic moment when combined moment of inertia of rotating masses is 20 kg-m²?

Question 7

A seamless pipe of diameter d m is to carry fluid under a pressure of p kN/cm². The necessary thickness t of metal in cm, if the maximum stress is not to exceed σ kN/cm² is

Question 8

Due to space constraint 5 coils are to be cut and removed from a spring with 25 active coils. Which one among the following is correct with respect to stiffness?

Question 9

For a discontinuity having shape of ellipse has semi major and semi minor axis of magnitude a and b respectively. It is having stress concentration factor equals to 3. If both the axes are increased to twice the initial value. The new stress concentration factor is

Question 10

The melting efficiency in case of arc welding of steel with a potential of 20 V and current of 200 A is to be calculated. The travel speed is 5 mm/s and the cross-sectional area fo the joint is 20 mm². Heat required to melt steel may be taken as 10 J/mm³ and the heat transfer efficiency as 0.85. The melting efficiency will be ______.

Question 11

Water at 42 ° is sprayed into a stream of air at atmospheric pressure, dry bulb temperature of 40 °C and a wet bulb temperature of 20 °C. The air leaving the spray humidifier is not saturated. Which of the following statements is true?

Question 12

The velocity components in the x and y directions of a two dimensional potential flow are u and v, respectively, then $Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE ME 18-Mar\GATE-ME-2005_files\image021.png$ is equal to

Question 13

The standard deviation of sample given below is
Sample: 1, 3, 2, 1, 5, 6, 3, 3

Question 14

In a parallel flow heat exchanger operating under steady state, the heat capacity rates (product of specific heat at constant pressure and mass flow rate) of the hot and cold fluid are equal. The hot fluid, flowing at 1 kg/s with C_p = 4 kJ/kgK, enters the heat exchanger at 102 °C while the cold fluid has an inlet temperature of 15 °C. The overall heat transfer coefficient for the heat exchanger is estimated to be 1 kW/m²K and the corresponding heat transfer surface area is 5 m². Neglect heat transfer between the heat exchanger and the ambient. The heat exchanger is characterized by the following relation: 2ε = 1 - exp(-2NTU).
The exit temperature (in °C) for the cold fluid is

Question 15

A force of 50 N is applied on a nail whose tip has an area of cross section of 0.02cm². Find the pressure on the tip

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