Determine the correctness or otherwise of the following Assertion (a) and Reason (r).<br>Assertion: During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.<br>Reason: Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.

An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.

A

B

D

C

B

D

C

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

The following items consist of two statements, one labeled as “Assertion (A)” and the other labeled as the “Reason (R)”. You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly. Assertion (A): A sphygmomanometer is always used in conjunction with a means to determine at what pressure, blood flow is just starting, and at what pressure it is unimpeded. Reason (R): Manual sphygmomanometers are used in conjunction with a stethoscope.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C

(A) is true, but (R) is false.

D

(A) false, but (R) is true.

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: MTT assay is used to determine cell viability based on the principle of color formation by DNA fragmentation.
Reason: MTT assay is used to determine cell viability based on the color development by converting tetrazolium soluble sail to insoluble salt.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true and (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: Condenser is an essential equipment in a steam power plant. Reason [r]: For the same mass flow rate and the same pressure rise, a water pump requires substantially less power than a steam compressor.

A

Both [a] and [r] are true and [r] is the correct reason for [a].

B

Both [a] and [r] are true but [r] is NOT the correct reason for [a].

C

[a] is true but [r] is false

D

[a] is false and [r] is true.

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: Cytoplasmic male sterility (cms) is invariably due to defect(s) in mitochondrial function.
Reason: cms can be overcome by pollinating a fertility restoring (Rf ) plant with pollen from a non cms plant.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true and (R) is not the correct reason for (A)

C

(A) is false but (R) is true

D

(A) is true but (R) is false

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: IgM is found in serum as a pentameric protein consisting of five IgM monomers.
Reason: The pentameric form of IgM is due to cross linking of IgM monomers via peptide bond.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true but (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion (a): During welding of aluminium alloys by the gas tungsten arc welding process, direct current reverse polarity (DCRP) mode is used.
Reason (r): DCRP facilitate breaking up of the oxide film on the workpiece surface.

A

a is true but r is false

B

a is false but r is true

C

both a and r are true, and r is the reason for a

D

both a and r are true, and r is not the reason for a

Determine the corrections or otherwise of the following assertion and reason : Assertion : Fuel consumption is more for low level, high speed flight mission. Reason: At low altitude, the aerodynamic efficiency decreases drastically which affects the engine efficiency and range as well. To maintain cruise flight more fuel consumption is required. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

A

and reason : Assertion : Fuel consumption is more for low level, high speed flight mission. Reason: At low altitude, the aerodynamic efficiency decreases drastically which affects the engine efficiency and range as well. To maintain cruise flight more fuel consumption is required. ] Both and are true and is the correct reason for

B

A

C

A

D

A

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

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

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion: During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.
Reason: Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.

Related Questions

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).Assertion: During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.Reason: Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.

Related Questions

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion: During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.
Reason: Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.