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Which of the following option is true for the given statements? Statement 1: Stainless steel has a high thermal coefficient of expansion than cast iron hence used to make scales. Statement 2: Most of the scales are produced by duplicating from master scale.

Correct Answer: F, T
stainless steel is used for making metal scales. It is stable with time if properly heated, have good finish, resistant to tarnishing but its coefficient of thermal expansion is less than the cast iron and steel.

Consider the following statements
1. Galvanisation is the method of protecting steel and iron fromrusting by coating them with a thin layer of zinc.
2. Pure iron is very soft but if it is mixed with a small amount of carbon, it becomes hard and strong.
3. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Which of the statements given above are correct?

Stainless steel A has a stacking fault energy of 8 mJ.m-2 and stainless steel B has a stacking fault energy of 45 mJ. m-2. The correct statement out of the following are.
P. A will have a wider stacking faults than B
Q. A will strain harden more rapidly than B
R. A and B will develop similar type of substructure
S. A and B will have the same temperature dependence of flow stress.

Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statements : The eligibility for admission to the course is minimum second class Master's degree. However, the candidates who have appeared for the final year examination of Master's degree can also apply.

Conclusions :
I. All candidates who have yet to get their Master's degree will be there in the list of selected candidates.
II. All candidates having obtained second class Master's degree will be there in the list of selected candidates.

Which of the following statements are true?
1. The coefficient of rank correlation has the same limits as the Karl Pearson's coefficient of correlation.
2. The coefficient of correlation is independent of the change of origin but not of scale.
3. The covariance between $$X$$ and $$Y$$ is defined as $$\frac{{\sum {xy} }}{n}$$ where, $$x = \left( {X - \overline X } \right),y = \left( {Y - \overline Y } \right)$$      and $$n = $$ no. of paired observations.
4. $${b_{xy}}$$ is called regression coefficient of $$X$$ variable on $$Y$$ variable.
5. If $${b_{xy}}$$ is 0.4 and $${b_{yx}}$$ is 1.6, coefficient of determination would be 0.8.
Select the correct answer:

Statements : All the phones are scales. All the scales are calculators.

Conclusions :
I. All the calculators are scales.
II. All the phones are calculators
III. All the scales are phones.
IV. Some calculators are phones.

Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore

Which of the following requirements form an essential element of 'course of employment' in cases of vicarious liability?
The servant's act must be:
1. Expressly or impliedly authorised by the master
2. Unauthorised manner of doing something which is authorised by the master.
3. Done to protect the interest of the master
4. Necessarily incidental to something which the servant is employed to do.
5. Done for the benefit of the master.
Select the correct answer using the given below:

Which of the following statement is true for following statements about universal measuring instrument? Statement 1: Microprocessor and micro switches are present. Statement 2: Coefficient of thermal expansion of measuring instrument made of steel is the same as a component to be measured.

Which of the following statement is true about graduated scales? Statement 1: For the purpose of machine setting, an optical arrangement can be used with graduated scales. Statement 2: Glass block is placed between the graduated scale and table.

What is the relation between the Coefficient of thermal expansion of concrete and the coefficient of thermal expansion in aggregates?