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3451. MCQPractice set · Question 3

Elastic limit কী?

a.
সর্বোচ্চ stress যেখানে permanent deformation হয় না
b.
fracture stress
c.
zero stress
d.
thermal stress

Correct answer: a

Elastic limit-এর মধ্যে load সরালে বস্তু সম্পূর্ণ বা প্রায় সম্পূর্ণ ফিরে আসে।

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3452. MCQPractice set · Question 4

Stress-এর সূত্র কী?

a.
force/original area
b.
force×area
c.
extension/length
d.
mass/volume

Correct answer: a

Stress হলো applied force প্রতি original cross-sectional area।

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3453. MCQPractice set · Question 5

Strain-এর সূত্র কী?

a.
change in dimension/original dimension
b.
force/area
c.
mass/volume
d.
work/time

Correct answer: a

Strain deformation-এর dimensionless ratio।

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3454. MCQPractice set · Question 6

Stress-এর SI unit কী?

a.
pascal
b.
joule
c.
watt
d.
metre

Correct answer: a

Stress force per area, তাই SI unit Pa বা N/m²।

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3455. MCQPractice set · Question 7

Strain-এর unit কী?

a.
কোনো unit নেই
b.
pascal
c.
newton
d.
metre

Correct answer: a

Strain একই dimension-এর দুই length-এর ratio, তাই dimensionless।

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3456. MCQPractice set · Question 8

Young's modulus কী?

a.
longitudinal stress/longitudinal strain
b.
force×area
c.
volume/mass
d.
pressure×time

Correct answer: a

Young's modulus axial stress ও axial strain-এর ratio।

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3457. MCQPractice set · Question 9

Bulk modulus কোন পরিবর্তন মাপে?

a.
volume change
b.
length only
c.
shape only
d.
color

Correct answer: a

Bulk modulus pressure-এর কারণে volumetric deformation প্রতিরোধ করে।

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3458. MCQPractice set · Question 10

Shear modulus কোন deformation-এর সাথে সম্পর্কিত?

a.
shape বা angular deformation
b.
volume only
c.
mass change
d.
temperature only

Correct answer: a

Shear modulus tangential stress ও shear strain-এর ratio।

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3459. MCQPractice set · Question 11

Modulus of elasticity-এর unit কী?

a.
pascal
b.
dimensionless
c.
metre
d.
kilogram

Correct answer: a

Modulus stress/strain এবং stress-এর মতো Pa unit বহন করে।

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3460. MCQPractice set · Question 12

Hooke's law কী বলে?

a.
elastic limit পর্যন্ত stress strain-এর সমানুপাতিক
b.
stress সবসময় zero
c.
strain force-এর বিপরীত
d.
সব deformation permanent

Correct answer: a

Elastic limit-এর মধ্যে stress ∝ strain।

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