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SSC-JE - ME : Technical Quiz-12

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Question 1

Impact test is done to find ____________.

Question 2

Heat is generated steadily in a 3 cm diameter spherical ball. The ball is exposed to ambient air at 26^oC with a heat transfer coefficient of 7.5 W/m²-^oC. The ball is to be covered with a material of thermal conductivity 0.15 W/m-^oC. If the ball surface temperature remains as constant, the thickness of the covering material that will maximize heat generation within the ball, is _________.

Question 3

An ideal gas at 27⁰C is heated at constant pressure till the volume becomes three times. The temperature of the gas will then be___.

Question 4

A metal rod is rigidity fixed at its both ends. The temperature of the rod is increased by 100 °C. If the coefficient of linear expansion and elastic modulus of the metal rod 10×10^-6/ °C and 200Gpa respectively, then what is the stress produced in the rod?

Question 5

In a balanced counter flow heat exchanger with

, the NTU is equal to 1.0. What is the effectiveness of the heat exchanger?

Question 6

Which one of the following statements is not correct?

Question 7

A liquid flows through two similar pipes 1 and 2. If the ratio of their flow velocities v₁ : v₂ be 2:3. what will be the ratio of the head loss in the two pipes?

Question 8

During a thermodynamic process, 84 kJ of heat flows into the system and the work done by the system is 32 kJ. The increase in thermal energy of the system is.

Question 9

The specific heat of a gas are given, by $Description: Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-1_files\image093.png$ where a, b and s are constant and T is in k. If a =0.946, b=0.662 and S = 10^-4. What is the value of gas constant?

Question 10

A wooden block rests on a horizontal force as shown in figure. The force (P) acting on it at an angle of 25°with horizontal. Assume the mass of block to be 8 Kg and coefficient of friction is 0.45.

The force (P) is __________.
Given: sin25º = 0.4226 and cos25º = 0.9063

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AE & JE Exams Mechanical Engineering

Mar 20AE & JE Exams