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1.0.0
MCQ
24201. দুটি RC footing-কে যখন RC beam দ্বারা যোগ করে। সমভাবে Pressure distribution করানো হয় তখন ঐ যুক্ত footing-কে বলা হয়-
Combined footing
Strap footing
Compound footing
Strip footing
ব্যাখ্যা: দুই বা ততোধিক কলামের ফুটিংগুলকে বিম দ্বারা সংযুক্ত করে একটি ফুটিং-এ অন্তর্ভুক্ত করাকে ক্যান্টিলিভার বা স্ট্রাপ (strap) ফুটিং বলা হয়।
24202. In a grillage footing, the maximum shear force occurs at the edge of base plate.
Right
Wrong
24203. Hole kept in a retaining wall for seepage of water is-
Brick hole
Weep hole
Steam hole
Black hole
ব্যাখ্যা: Weep hole রিটেইনিং ওয়ালে ড্রিল করা একটি ছিদ্র, যা রিটেইনিং ওয়ালের অভ্যন্তরস্থ পানি নির্গমনে সহায়তা করে।
24204. The common section used in lacing, is-
rolled steel flat
rolled angle
rolled channel
all of these
24205. The effective length of a battened columns should be increased by-
5%
10%
15%
20%
ব্যাখ্যা: Shear deformation effect নেওয়ার জন্য কলামে বেটেনস ব্যবহার করা হয়। Lacing members-এর তুলনায় Batens ব্যবহারে শিয়ার ডিফরমেশন বৃদ্ধি পায়, তাই 10% হারে কার্যকরী দৈর্ঘ্য বৃদ্ধি করা লাগে।
24206. Slenderness ratio of the lacing bar for compression member should not exceed-
125
145
135
155
ব্যাখ্যা: As per IS 800 Design specification of lacing are: 1. The angle of inclination of the lacing with the longitudinal axis of the column should be between 40° to 70° 2. Slenderness ratio of lacing bar should not exceed 145.
24207. Black cotton soil is not suitable for foundation because its-
bearing capacity is low
permeabitily is uncertain
particles are cohesive
property undergo to volumetric change due to variation of moisture content
ব্যাখ্যা: Black cotton soil is not suitable for foundation because it swells excessively when wet and it shrinks excessively when dry. So it is not suitable because of its property to undergo a volemetric change due to variation of moisture content
24208. Allowable working stress compression in the column splice plate may be taken as-
60 N/mm²
80 N/mm²
100 N/mm²
125 N/mm²
24209. A single triangular system is formed in the case of-
single lacing
double lacing
both a and b
none of these
24210. অগভীর ভিত্তির জন্য কোন পদ্ধতিতে মাটি তদন্ত করা হয়?
ওপেন টেস্ট পিট
ওয়াশ বোরিং
কোর ড্রিলিং
প্রবিং
ব্যাখ্যা: অগভীর ভিত্তির জন্য ওপেন টেস্ট পদ্ধতিতে মাটি তদন্ত করা হয়।
24211. According to Terzaghi, a foundation is said to be shallow if its depth is-than its width
equal to
less than
both (A) and (B)
none of the mentioned
ব্যাখ্যা: According to Terzaghi, a foundation is shallow if its depth is equal to or less than its width. In the case of deep foundations the depth is equal to or greater than the width
24212. Generally foundations are-.
two types
five types
three types
four types
ব্যাখ্যা: Generally foundations are two types, such as- (i) Shallow foundation (ii) Deep foundation.
24213. The width of bearing plate is--- the width of the flange of column.
equal to
greater than
less than
none of these
24214. An eccentrically loaded column is subjected to-
bending stress
direct stress
shear stress
both a and b
24215. In a grillage footing, the maximum bending moment occurs at the-
edge of beam
centre of beam
edge of base
plate none of these
24216. The bending stress in a beam at neutral axis is-
zero
maximum
minimum
none
ব্যাখ্যা: 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.
24217. The lateral system used in built-up columns, to carry the transverse shear force, is-
lacing
perforated plates
batten plates
any one of these
24218. The example of deep foundation is-
combined footing
pile foundation
mat foundation
isolated footing
ব্যাখ্যা: There are 3 types of deep foundation, such as- (i) Pile foundation (ii) Coffer dams (iii) Caisson or well foundation.
24219. What is the hook length for steel reinforcement of diameter d?
2d
6d
9d
16d
24220. The columns whose slendeness ratio is less than 80, are known as-
short columns
long columns
weak columns
medium columns
ব্যাখ্যা: When the columns slendeness ratio is less than 80 is called short column and columns slendeness ratio is greater than 80 is called long column. It is generally fails by buckling.