VIZAG Steel 2017 Civil Re-exam: Quiz 9

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Question 1

Consider the following statements:
Exponential smoothing
1). is a modification of moving average method
2). is a weighted average of past observations
3). assigns the highest weightage to the most recent observation
Which of these statements are correct?

• A1, 2 and 3
• B1 and 2 only
• C2 and 3 only
• D1 and 3 only

Question 2

A velocity potential function exists only for

• ASteady flow
• BUniform flow
• CIrrotational flow
• DCompressible flow

Question 3

A bar of copper and steel from a composition system which is heated through a temperature of 40˚C. The stress induced in copper bar is

• ATensile
• BCompressive
• CBoth tensile and compressive
• DShear

Question 4

The resultant of all normal pressures on a body immersed in liquid acts

• Athrough the centre of gravity of the body
• Bthrough the centre of gravity of pressure
• Cvertically upwards
• Dat metacentre

Question 5

The ratio of the section moduli of a square beam (Z) when square section is placed (i) with two sides horizontal (Z₁) and (ii) with a diagonal horizontal (Z₂) as shown is

• A
• B
• C
• D

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