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SSC JE 2019-20: Technical Quiz 3

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Question 1

When the diameter of the circular section is doubled, its radius of gyration is

Question 2

The efficiency of a Carnot cycle is 45%. If the lower temperature is maintained constant and the upper temperature is increased, calculate the % increase in the upper temperature if the efficiency of the cycle now is 55%

Question 3

A cylindrical rod is undergoing uniform heat generation. If its surface temperature is 20 K, what will be the temperature at the center of the rod under the following condition: qG=500 W/m3, the radius of rod=10 cm, thermal conductivity=0.25 W/mK

Question 4

A steady, incompressible flow is given by u = x2 + y2 and v = 2xy. What is the convective acceleration along x direction at the point (1, 1)?

Question 5

The different between constant pressure specific heat CP and constant volume specific heat CV for pure substance

Question 6

Which of the following is not a type of resistance welding?

Question 7

Match List-I (Component) with List-II (Required Property) and select the correct answer using the codes given below the lists:
List-I
[A]. Blades of bulldozer
[B]. Gas turbine blades
[C]. Drill bit
[D]. Spring of automobiles
List-II
[1]. High wear resistance and high toughness
[2]. Low Young’s modulus and high fatigue strength
[3]. High wear and abrasion resistance
[4]. High creep strength and good corrosion resistance

Question 8

An engine has a swept volume of 100 cm3 and a clearance volume of 20 cm3. The mechanical efficiency is 0.8 and volumetric efficiency is 0.75. The volume taken in per stroke will be

Question 9

Which of the following metal forming processes performs squeezing out of material through a hole?

Question 10

A velocity potential function exists only for
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