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AAI Technical Rapid Quiz-11

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Question 1

Which of the following is a line defect found in metal crystals?

Question 2

Given the atomic weight of Fe is 56 and that of C is 12, the weight percentage of carbon in cementite (Fe₃C) is ________

Question 3

A Chemical fluid was being carried from one place to another through a pipe laying on the ground at the same height. The chemical flows from one pipe to another pipe of different cross-section area 5 m² (Pipe 1) and 3m² (Pipe 2) respectively. Which pipe will feel a greater pressure from the fluid?

Question 4

Heat flow through an evaporator is analyzed. The walls are assumed to be plane, and following are the parameters found : Rate of heat transfer = 64 kW, heat transfer coefficient for hot and cold fluids are 115 W/m²K and 95 W/m²K respectively, thermal conductivity of wall is 200 W/mK. If the thickness of the wall is 10mm. What will be the Overall heat transfer coefficient ?

Question 5

Gantt chart is used for _______.

Question 6

Two helical springs of same wire diameter, diameter and shear modulus are kept under the same load. Number of turns in spring 1 and spring 2 is 6 and 4 respectively. Ratio of energy stored in spring 1 to spring 2-

Question 7

In open-die forging, a disc of diameter 200 mm and height 60 mm is compressed without any barreling effect. The final diameter of the disc is 600 mm. the true strain is

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