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টেক্সটাইল ইঞ্জিনিয়ারিং

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3841. MCQPractice set · Question 93

Pressure head-এর সূত্র কী?

a.
P/(ρg)
b.
Pρg
c.
F/A²
d.
m/V

Correct answer: a

Pressure head হলো pressure per unit specific weight, h=P/(ρg)।

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3842. MCQPractice set · Question 94

Water-এর 2 m depth-এ gauge pressure, ρ=1000 ও g=10 হলে কত?

a.
20 kPa
b.
2 kPa
c.
200 kPa
d.
0.2 kPa

Correct answer: a

P=ρgh=1000×10×2=20000 Pa=20 kPa।

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3843. MCQPractice set · Question 95

Water-এর density 1000 kg/m³ এবং depth 5 m হলে pressure কত, g=10?

a.
50 kPa
b.
5 kPa
c.
500 kPa
d.
0.5 kPa

Correct answer: a

P=1000×10×5=50000 Pa=50 kPa।

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3844. MCQPractice set · Question 96

100 N force 0.5 m² area-তে হলে pressure কত?

a.
200 Pa
b.
50 Pa
c.
100.5 Pa
d.
0.005 Pa

Correct answer: a

P=F/A=100/0.5=200 Pa।

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3845. MCQPractice set · Question 97

200 kPa pressure 0.2 m² piston-এ হলে force কত?

a.
40 kN
b.
1 kN
c.
200.2 kN
d.
0.04 kN

Correct answer: a

F=PA=200000×0.2=40000 N=40 kN।

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3846. MCQPractice set · Question 98

Hydraulic machine-এ input area 0.01 m² ও output area 0.2 m² হলে ideal force ratio কত?

a.
20
b.
0.05
c.
0.2
d.
200

Correct answer: a

F₂/F₁=A₂/A₁=0.2/0.01=20।

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3847. MCQPractice set · Question 99

Liquid pressure-এর dimension কী?

a.
ML⁻¹T⁻²
b.
ML²T⁻²
c.
MLT⁻¹
d.
M⁰L⁰T⁰

Correct answer: a

Pressure=force/area, তাই dimension ML⁻¹T⁻²।

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3848. MCQPractice set · Question 100

Liquid pressure-এর depth relation কেমন?

a.
সরাসরি সমানুপাতিক
b.
বিপরীত সমানুপাতিক
c.
square-এর সমানুপাতিক
d.
কোনো সম্পর্ক নেই

Correct answer: a

Density ও g স্থির হলে P depth-এর সাথে linear proportional।

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3849. MCQPractice set · Question 1

Surface tension কী?

a.
surface-এ force per unit length
b.
force per unit area
c.
mass per volume
d.
work per time

Correct answer: a

Surface tension liquid surface-এর tangent বরাবর unit length-এ force।

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3850. MCQPractice set · Question 2

Surface tension-এর SI unit কী?

a.
N/m
b.
N/m²
c.
J/m³
d.
kg/m³

Correct answer: a

Surface tension force per length হওয়ায় SI unit N/m।

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