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MCQ
21. The walls which are necessary on the hill side of roadway where earth has to retained from slipping is knows as:
Retaining wall
Breast wall
Parapet wall
None of these
22. The arrangement made to support an unsafe structure temporarily as:
Shoring
Scaffolding
Underpinning
Jacking
ব্যাখ্যা: Shoring is the process of temporarily supporting a building, structure or trench with shores when in danger of during repairs. Shoring comes from shore, a timber or metal. Shoring may be vertical angled or horizontal.
23. The main ingredients of Portland Cement are:
Lime and Silica
Lime and alumina
Lime and iron
Silica and alumina
ব্যাখ্যা: The chief chemical components of portland cement are calcium or lime and silica. The percentage of lime and silica are 63% and 22%. Lime is derived from lime stone and silica comes from the sands and clay.
24. A pipe conveying sewage from plumbing system of a single building to common sewer is called:
house sewer
lateral sewer
main sewer
submain sewer
ব্যাখ্যা : Main sewer as the primary pipeline in a sewerage system to which all the branching pipes carrying sewage from different location. Submain sewer means a city or privated owned sewer pipe designed to convey sewage from two or more building laterals to a main sewer.
25. Water content of soil can:
never be greater than 100%
be less than 50%
from 0 to 100%
be greater than 100%
26. A simply supported beam of span 'L' carries a uniformly distributed load 'w'. The maximum moment 'M' is:
WL/2
WL/8
WL/4
WL/16
27. Disinfection of water results in-
Removal of turbidity
Removal of hardness
Killing of disease bacteria
Removal of taste
ব্যাখ্যাঃ Water disinfection means the removal, deactivation or killing of pathogenic microorganisms.
28. Plane and geodetic surveying are classification of surveying based on:
Methodology
Earth's curvature
Ojbect of survey
Instrument
29. The moment at a hinge will be:
Infinity
Zero
Depends upon acting force
None of these
ব্যাখ্যাঃ The bending moment at ends of simpls supported and roller or hinge supported beam is taken zero,
30. The bending moment of cantilever beam shown below figure at 'A' is:
Zero
8 T-m
16 T-m
14 T-m
31. Uniformity coefficieny of a soil is:
equal to or greater than 1
equal to 1
equal to or less than 1
none of these
ব্যাখ্যাঃ The uniformity coefficient (cu) is defined as the ratio of Due to Dio A value of cu greater than 4 to 6 classific the soil as well graded. When cu is less than 4, it is classified as poorly graded or uniformly graded soil. Uniformly graded soil has identical particles with cu value approximately equal to 1.
32. The piece of a brick cut with its one corner equivalent to half the length and half the width of a full brick is known as:
Queen closer
Bevelled closer
King closer
Half-king closer
33. Which one of the following is used for preparing porcelain?
Clay
Quartz
Feldspar
All of these
ব্যাখ্যাঃ The principal clays used to make porcelain are chain a clay and ball clay. Feldspar a mineral comprsing mostly aluminium silicate, a type of hard quartz in the porcelain mixture.
34. The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called-
Density of liquid
Specific gravity of liquid
Compressibility of liquid
Surface tension of liquid
ব্যাখ্যা The specific griaunity of an object is the ratio between the density of an object to a reference liquid. Usually our reference liquid in water, which has a density of Ig/ml.
35. Penetration test on bitumen is used to determine its:
Grade
Viscosity
Ductility
All of these
ব্যাখ্যাঃ Bitumen penetration test is a basic test for determining the grades of bitumen. Penetration test is used for evaluating consistency of bitumen.
36. Dead load comprise of:
Permanently attached loads
Temporarily attached loads
Permanent as well as temporary loads
All the above
ব্যাখ্যা: Dead load comprise of permanently attached loads. Dead loads are the loads that will go no where in the structure and they are most important when designing slabs and beams. Dead load consists of own weight of the element and the weight of the floor finishing
37. The ultimate tensile strength of 400 grade structural mild steel is about:
160 N/mm²
260 N/mm²
420 N/mm²
520 N/mm²
38. Vertical construction joints are provided where the shearing forces are minimum in the case of the-
Slabs
Girder
Beams
All of these
39. The proportion of lime and sand in the mortar normally used in brick constructions are:
1:2
1:6
1:4
1:8
40. In a pre-stressed member, it is advisable to use:
Low strength concrete only.
High strength concrete only.
Low strength concrete but high tensile steel.
High strength concrete and high tensile steel.