# Strength of Materials Questions and Answers – Rivet Joint

This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on “Rivet Joint”.

1. The effect of ___________ holes is to reduce the strength of connected plates.
a) Lap
b) Weld
c) Rivet
d) Butt

Explanation: The effect of rivet holes is to reduce the strength of the connected plates. The strength of the plate or strength of rivet whichever is less is called the strength of the joint.

2. A cylinder section having no __________ is known as seamless section.
a) Moment
b) Force
c) Strength
d) Joint

Explanation: A seamless section is a section of the cylinder having no joint. No other section in a cylinder is as strong as seamless section of the same thickness and dimensions.

3. A water main of 1 m in diameter and 25 mm thick is subjected to an internal pressure of 2.5 N/mm2. Calculate the longitudinal stress induced.
a) 20 N/mm2
b) 25 N/mm2
c) 30 N/mm2
d) 35 N/mm2

Explanation: Longitudinal stress = fl = pd/4t
fl= 2.5 × 1000 / 4 × 25
fl = 25 N/mm2.

4. What is the design Bond stress in plane bars intention for m25 grade concrete?
a) 1.2 N/mm2
b) 1.4 N/mm2
c) 2 N/mm2
d) 3 N/mm2

Explanation: The design Bond stress in plane bars intention for m25 grade concrete is 1.4 N/mm2.

5. The value of design Bond stress in plain bars will increase in compression by __________
a) 30%
b) 25%
c) 50%
d) 60%

Explanation: The value of design bond stress will be increased by 25% in compression and for the deformed (HYSD bars) these values may be increased by 60%.
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6. What is the anchorage value of standard “U” type hook?
a) 16 times the diameter of bar
b) 12 times the diameter of bar
c) 8 times the diameter of bar
d) 4 times the diameter of bar

Explanation: The anchorage value of standard “U” type hook is 16 times the diameter of bar.

 Type of hook / bend U hook 45° Bend 90° Bend Anchorage value 16 × diameter of bar 4 × diameter of bar 8 × diameter of bar

7. The flexural bond is _________ at the section.
a) Zero
b) Maximum
c) Minimum
d) Uniform

Explanation: The flexural (local) bond is maximum at the section where the shear force is large. Therefore the check for flexural bond is necessary at the sections where shear force is maximum and bending moment is zero.

8. _________ reinforcement is designed for sections where the bending moment is maximum.
a) Torsional
b) Tension
c) Shear
d) Longitudinal

Explanation: Tension reinforcement is designed for section where the bending moment is maximum. The bending moment varies along the span of a beam depending on the loading and support conditions.

9. In case of __________ beams, the 50% of bars are curtailed at a distance of 0.5 ×l.
a) Simply supported
b) Cantilever
c) Continuous
d) Overhanging

Explanation: According to the simplified rules for curtailment of bars, In case of cantilever beams, 50% of bars may be curtailed at 0.5 l or Ld which is more from the face of the support.

10. Splices are provided when the ________ bar available is less than that required.
a) Diameter
b) Length
c) Effective depth
d) Number of

Explanation: Splices are generally provided when the length of the bar available is less than that of required. The splicing of reinforcement is provided by lap joint or mechanical joint on the welded joint.

11. Lap splices should not be used for bars larger than __________ mm.
a) 24 mm
b) 42 mm
c) 54 mm
d) 36 mm

Explanation: Lap splices should be used if and only if, the size of bars is less than 36 mm. For larger diameter, bars may be welded.

12. Cantilever slab is categorised based on support conditions.
a) True
b) False

Explanation: Based on support conditions, the slabs are classified as
i. Simply supported slab
ii. Cantilever slab
iii. Fixed slab
iv. Continuous slab
v. Flat slab.

13. According to IS 456: 2000; the span to depth ratio of a simply supported beam is ___________
a) 7
b) 20
c) 26
d) 32

Explanation: As per clause 23.2 of IS 456 for spans not exceeding 10 m, this span to depth ratio should not exceed the limits given below
Cantilevers – 7
Simply supported – 20
Continuous – 26.

14. The __________ of the slab is governed by span to depth ratio.
a) Strength
b) Stiffness
c) Reinforcement
d) Stability

Explanation: The term stiffness is defined as the ability to resist deformation. The stiffness of slabs is governed by span to depth ratio. It depends on the type of steel and the percentage of steel.

15. The material does not possessing any kind of elastic symmetry, then the material is said to be _______
a) Isotropic
b) Exo tropic
c) Anisotropic
d) Orthotropic

Explanation: The material do not possessing any kind of elastic symmetry in them than the material is said to be anisotropic material or allotropic material. It has 21 elastic constants.

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