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VIZAG Steel M.T. Exam. 2017- Mechanical Quiz 1

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Question 1

Flame hardening is NOT suitable for surfaces of low carbon steel components due to:

Question 2

Which one of the following statements is correct?

Question 3

The equation of motion of a linear vibratory system with a single degree of freedom is The critical damping coefficient for the system is ___________.

Question 4

Consider the following statements in repsect of ideal and practical gas turbine cycles :
1) In the ideal cycle case, the cycle efficiency depends on the pressure ratio only.
2) In the practical cycle case (with irreversibilities in the compression and expansion processes), The cycle efficiency depends on the maximum temperature as well as on the pressure ratio.
3) In the practical cycle case, at a given maximum temperature, the maximum efficiency and the maximum work done occur at a same pressure ratio.
Which of the above statements are correct?

Question 5

In a two-stroke Petrol engine, fuel loss is maximum after:

Question 6

The bearing characteristic number depends on:

Question 7

Surface cracking occurring at low temperatures in hydrostatic extrusion is known as

Question 8

The centre-line velocity in a pipe flow is 2m/s. What is the average flow velocity in the pipe if the Reynolds number of the flow is 800?

Question 9

Which one of the following metal forming processes is not a high energy rate forming processes?

Question 10

Thermal boundary layer is a region where:
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