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MCQ
1421. The energy stored in a body wen strained within elastic limit is known as-
resilience
proof resilience
strain energy
impact energy
Explained:-The energy stored in a body when strained with in elastic limie is known as strain enery,. The maximum strain enery which can be stored in a body is termed as proof resilience. The proof resilience per unit volume of a material is known as modulus of resilience.
1422. A short column (30 cm x 20 cm) carries a load P1 at 4 cm on one side and another load P2at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P1 to P2 will be--
2/3
3/2
8/5
5/8
1423. বেন্ডিং মোমেন্ট ডায়াগ্রামের হেলানো সরল রেখা নিচের কোনটি নির্দেশ করে?
শূন্য লোড
হেলানো লোড
কাপল লোড
সেন্ট্রাল লোড
1424. Pick up the correct statement from the following:
A wire wound in spiral form, is called a helical spring
The pitch of a close coil spring, is very small
The angle made by the coil with horizontal, is called the angle of helix
All the above
1425. 100 N force is applied on an area 1000 mm². Choose the correct stress.
0.1 MPa
0.01 MPa
1 MPa
1 Kpa
1426. [100 mm² ক্ষেত্রফলের উপর 100 N বল প্রয়োগ করলে সঠিক পীড়ন কত হবে?)
0.1 MPa
0.01 MPa
1 MPa
1 Kpa
1427. The neutral axis of a beam is subjected to........
zero
minimum
maximum tensilie
maximum
Explained-There is no load acting on neutral axis so bending stress on the neutral axis is zero, but shear stress are maximum at neutral axis.
1428. The stress developed in the material without any permanent set is called-
elastic limit
yield point
ultimate point
breaking point
Explained:-Elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stress up to the elastic limit are removed, the material resumes its original size and shape.
1429. Resisting force per unit area parallel to plane called --
Bending stress
Axial stress
Torsional stress
Shear stress
1430. যে দেয়াল ভারাট মাটির পার্শ্বচাপ বহনের জন্য তৈরি করা হয় তাকে বলে-
Boundary wall
Vertical wall
Shear wall
Retaining wall
1431. The ratio of lateral strain to axial strain of a homogeneous material, is known --
Yield ratio
Hooke's ratio
Poisson's ratio
Plastic ratio
1432. তলের সমান্তরালে একক ক্ষেত্রফলের উপর প্রতিরোধী বলকে--- বলা হয়।
Bending stress
Axial stress
Torsional stress
Shear stress
1433. The factor of safety due to sliding for the retaining wall is generally taken as-
1
1.5
2
4
Explained:-The factor of safety against sliding is defined as force preventing sliding along the bottom divided by the force that will cause sliding along the bottom surface. Factor of safety should not be less than 1.5 for sliding condition.
1434. A welded joint as compared to a riveted joint has............. strength.
same
more
less
four times
Explained:-Welded joint provides greater strength, Riveted joint lesser strength as compare to riveted strength. Riveted joints are generally heavier than welded joints.
1435. Calculate the maximum deflection of a cantilever beam with UDL on entire span of 3 m. The intensity of UDL be 25kN/m. Take El as 4000 kN/m² --
0.052 m
0.076 m
0.063 m
0.069 m
1436. Resisting force per unit area is called ---
Strain (বিকৃতি)
Shear (করুন)
Moment (ভ্রামক)
Stress (পীড়ন)
1437. Modulus of rigidity is the ration of - (মডুলাস অব রিজিডিটির অনুপাত হল-)
Normal stress to normal strain
Shear stress to shear strain
Lateral stress to lateral strain
None of the above.
1438. If a solid shaft (diameter 20 cm, length 400 cm, N 0.8105 N/mm2) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm2, the angle of twist in radians, is--
0.001
0.002
0.0025
0.003
1439. বেন্ডিং মোমেন্ট ডায়াগ্রামের হেলানো সরল রেখা নিচের কোনটি নির্দেশ করে?
শূন্য লোড
হেলানো লোড
কাপল লোড
সেন্ট্রাল লোড
Explained:- মসৃণ বক্ররেখা সমভাবে বিস্তৃত লোড নির্দেশ করে। পরিবর্তনশীল বক্ররেখা ত্রিভুজাকার লোড নির্দেশ করে আর উল্লম্ব রেখা ও রেখার মান কাপল লোড নির্দেশ করে।
1440. The bending strees in a beam at neutral axis is-
zero
minimum
maximum
none of these
Explained:-There is no load acting on neutral axis so bending stress on the neutral axis is zero, but shear stress are maximum at neutral axis