In the context of tensile test of a ductile alloy, the following observations were made. Choose the correct ones from the following observations: P. Per cent elongation is independent of the dimensions of the test specimens. Q. The number of necking instabilities are different in cylindrical and sheet specimens. R. The range of strain rates to be used for 'static tensile test' is 10-1 to 10-5 s-1. R. The yield stress is independent of the temperature of the test.

From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.

A

P, Q

B

Q, R

C

Q, S

D

R, S

Re-arrange the following sentences into a meaningful paragraph. (A) comes into effect from today. The bank's savings account rate was 3.5 per cent during March 2003 to May 2011 for all savings bank account customers (B) The bank's decision comes two days ahead of RBI's monetary policy meet and is likely to trigger (C) with deposits of above Rs 1 crore, it said in a statement. The two-tier savings bank account interest rate (D) to 3.5 per cent, lowest in six years, a decision that will impact 90 per cent of its customers (E) The country's largest lender however will continue to pay 4 per cent interest on savings bank accounts (F) SBI today cut interest rate on savings bank account deposits up to Rs 1 crore by 0.5 per cent (G) rate war among peers. SBI's savings bank account base is of around Rs 9 lakh crore.

A

BDFACEG

B

BFDCAGE

C

EGACDFB

D

FDBGECA

The median for an odd number of observations is _________ where n is the number of observations. rank on the ascending order of observations b) rank on the ascending order of observations c) Average of and (n/2) rank on the ascending order of observations d) (n/2) rank on the ascending order of observations

A

rank on the ascending order of observations

B

(n-1)/2 + 1

C

(n-1)/2 + 1

D

(n-1)/2 + 1

In this company, 60 per cent of the employees are males, 40 per cent are females, 80 per cent of the employees are sincere and 40 per cent of the employees are from this city - Rawalpura.

A

All male employees are from out station.

B

All male employees are sincere.

C

20 per cent of female employees are not sincere.

D

All female employees are from Rawalpura.

E

None of these

How does number of observations influence overfitting? Choose the correct answer(s).Note: Rest all parameters are same
1. In case of fewer observations, it is easy to overfit the data.
2. In case of fewer observations, it is hard to overfit the data.
3. In case of more observations, it is easy to overfit the data.
4. In case of more observations, it is hard to overfit the data.

A

1 and 4

B

2 and 3

C

1 and 3

D

none of theses

Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, $$\sigma $$ = yield strength and E = modulus of elasticity)

A

E

B

$$\sigma $$

C

$$\frac{\sigma }{{\text{E}}}$$

D

$$\frac{{\text{E}}}{\sigma }$$

Salaries of Karthik, Arun and Akhil were in the ratio 4 : 5 : 6 respectively. If their salaries were increased by 50 per cent, 60 per cent and 50 per cent respectively, what will be the new ratio of the salaries of Akhil, Arun and Karthik ?

A

6 : 8 : 9

B

8 : 6 : 9

C

9 : 8 : 6

D

6 : 5 : 4

If the specimen is deformed plastically beyond the yield stress in one direction, e.g., tension and then after unloading it is loaded in the opposite direction, e.g., compression, it is found that the yield stress is less than the original yield stress. This dependence of yield stress on direction loading is called ____________

A

bauschinger effect

B

strain hardening

C

residual stress

D

nabarro–herring effect

A metallic sheet 1 m wide and 10 mm thick is to be rolled under a front tension force of 100 KN. A specimen from the sheet, tested under tension, shows a yield stress of 100 MPa. Assume plain strain condition during rolling and ignore the friction. If yielding is assumed to start at a roll pressure of σ3 MPa, then the stress in the width direction (where strain is zero) is

A

$$2 + \frac{{\sigma 3}}{2}$$

B

$$4 + \frac{{\sigma 3}}{5}$$

C

$$5 + \frac{{\sigma 3}}{2}$$

D

$$5 + \frac{{\sigma 3}}{3}$$

The digitization process i.e. the digital image has M rows and N columns, requires decisions about values for M, N, and for the number, L, of max gray levels is an integer power of 2 i.e. L = 2k, allowed for each pixel. If we assume that the discrete levels are equally spaced and that they are integers then they are in the interval __ and Sometimes the range of values spanned by the gray scale is called the of an image. and static range respectively b) and dynamic range respectively c) and static range respectively d) and dynamic range respectively

A

and static range respectively

B

0, L – 1

C

0, L – 1

D

0, L – 1