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থিউরি অব স্ট্রাকচার MCQ
21. The most suitable equipment for compacting clay soil is a:
Smooth wheet roller
Preumatic tyred roller
Sheep foot roller
Vibrator
ব্যাখ্যাঃ Sheep foot roller are used for compacting fine grained soils such as heavy clays and silty clay. Sheep foor rollers are used for campaction of soil in damı embankments, subgrade layers in pavements and ruil road construction projects.
22. Why are steel reinforcing rods used in concrete beams:
To make it carry compression
To make it carry tension
To make it carry both compression and tension
None of these
23. The greatest load which a spring can carry without getting permanently distorted, is called--
Stiffness
Proof resilience
Proof stress
Proof load
24. The force in AC of the truss shown in the given figure, is--
5t tension
4t tension
5t compression
4t compression
25. The ratio of maximum and average shear stresses on a rectangular section, is--
1
1.25
1.5
2.5
26. A pre-cast pile generally used is:
Circular
Octagonal
Square
Rectangular
27. ml and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if
m=ml+m2
m=ml+m2+1
m=ml+m2+2
m=ml+m2+3
28. For beams breadth is constant,--
Depth d M
Depth d
Depth d 3
Depth d 1/M
29. The force in BF of the truss shown in given figure, is--
4t tension
4t compression
4.5t tension
4.5t compression
30. Enlarged head of a supporting column of a flat slab is technically known as:
Supporting end of the column
Top of the column
Capital
Drop panel
ব্যাখ্যা: Column capital between the column and the load thrusting down upon it, broadening the area of the column's supporting surface.
31. Workability of concrete is measured by:
Vicat apparatus test
Slump test
Setting time test
Fineness test
ব্যাখ্যাঃ Concrete slump test or slump cone test is to determine the workability or consistency of concrete mix prepaved at the laboratory or the construction site during the progress of work
32. The ratio of maximum shear stress to average shear stress of a circular beam, is--
2/3
3/2
3/4
4/3
33. Pick up the correct statement from the following:
Mcg-MM2+r2) where letters carry their usual meanings
Tcpm2+T2)where letters carry their usual meanings
The torque which when acting alone would produce maximum shear stress equal to the maximum shear stress caused by the combined bending and torsion, is called equivalent torque
All the above
34. The book in which chain measurements are entered is called:
Field book
Study book
Record book
Chain book
ব্যাখ্যাঃ The field measurements sketches and relevant notes are recorded for future refernce in a note book known as field book. There are two types of field book such as single line and double line field book.
35. The spacing of transverse reinforcement of column is decided by the following considerations:
The teast lateral dimension of the column.
Sixteen times the diameter of the smallest longitudinal reniforcing rod is the column.
Forty-eight times the diameter of transverse reinforcement.
all the above.
ব্যাখ্যা: Transverse reinforcement means column stirrups. Spacing 16 dia of main bar. Spacing $48 dia of fit bar and speacing so lateral dimension of column.
36. For calculating the permissible stress 0 y/[(1+ a(l/r)]is the empirical formula, known as --
Straight line formula
Parabolic formula
Perry's formula
Rankine's formula
37. The member of independent equations to be satisfied for static equilibrium of a plane structure is:
।
2
3
6
38. Pick up the correct statement from the following:
In a loaded beam, the moment at which the first yield occurs is called yield moment
In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
All the above
39. The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span 1 and rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance
1/4
h/4
1
2
40. For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is --
0.303
0.404
0.505
0.707