Legal Metrology • 2018 • Civil Engineering Paper-I
Neutral axis for a beam is defined as a fibre for which
A)
longitudinal strain is zero
B)
longitudinal stress is zero
C)
poisson’s ratio is zero
D)
both (a) & (b)
The correct choice is D (both (a) & (b)), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
In a solid rotating disc, the hoop stress is maximum at the
A)
Centre
B)
Mean radial section
C)
Outer surface
D)
None of these
The correct choice is A (Centre), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
Area under the stress-strain curve represents
A)
Strain energy density of the material
B)
Limiting value of failure stress
C)
Limiting value of failure strain
D)
Work done on body
Correct option A: Strain energy density of the material.
Legal Metrology • 2018 • Civil Engineering Paper-I
As per Indian standard code of practice for prestressed concrete (IS : 1343-1980) the minimum grades of concrete to be used for post-tensioned and pre-tensioned structural elements are respectively.
A)
m20 for both
B)
m40 and m30
C)
m15 and m20
D)
m30 and m40
The correct choice is B (m40 and m30), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The centre of gravity of a triangle is at the point where three
A)
medians of the triangle meet
B)
perpendicular bisectors of the sides of the triangle meet
C)
bisectors of the angle of the triangle meet
D)
none of these
The correct choice is A (medians of the triangle meet), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The following compounds may be used as inhibitors of iron corrosion
A)
Calcium and sodium chlorides
B)
Calcium sulfate
C)
Potassium dichromate, zinc and lead chromates
D)
Fly ash
The correct choice is C (Potassium dichromate, zinc and lead chromates), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
In RCC column, if ties are not provided, the column is likely to
A)
Fail by buckling
B)
Fail by crushing
C)
behave like a beam
D)
none of these
Correct option A: Fail by buckling.
Legal Metrology • 2018 • Civil Engineering Paper-I
An ISMB 500 is used as a beam in a multi-storey construction. From the viewpoint of structural design, it can be considered to be ‘laterally restrained’ when
A)
the tension flange is ‘laterally restrained’
B)
the compression flange is ‘laterally restained’
C)
the web is adequately stiffened
D)
the conditions in a and c are met
Correct option B: the compression flange is ‘laterally restained’.
Legal Metrology • 2018 • Civil Engineering Paper-I
In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridonial force is always
A)
zero
B)
tensile
C)
compressive
D)
shear
Correct option C: compressive.
Legal Metrology • 2018 • Civil Engineering Paper-I
In a steel plate with bolted connection, the rupture of the net section is a mode of failure under
A)
tension
B)
compression
C)
flexure
D)
shear
The correct choice is A (tension), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
Primary unknown in case of flexibility method is
A)
Forces
B)
Displacement
C)
Both (a) & (b)
D)
None of these
Correct option A: Forces.
Legal Metrology • 2018 • Civil Engineering Paper-I
Principal planes are subjected to
A)
normal stresses only
B)
tangential stresses only
C)
normal stresses as well as tangential stresses
D)
none of these
The correct choice is A (normal stresses only), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The resistance to deformation of a body per unit area is known as
A)
Modulus of elasticity
B)
Modulus of rigidity
C)
Stress
D)
Strain
The correct choice is C (Stress), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The specific gravity of Granite is
A)
2.20
B)
2.40
C)
2.64
D)
2.80
The correct choice is C (2.64), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
A reinforced concrete slab is 75 mm thick. The maximum size of reinforcement bar that can be used is
A)
6 mm diameter
B)
8 mm diameter
C)
12 mm diameter
D)
16 mm diameter
The correct choice is B (8 mm diameter), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
A material is referred to as perfectly rigid if modulus of elasticity of the material is
A)
Unity
B)
Zero
C)
Equal to carbon
D)
Infinity
The correct choice is D (Infinity), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
In a plate girder, the web plate is connected to the flange plates by fillet welding. The size of the fillet welds is designed to safely resist
A)
the bending stresses in the flanges
B)
the vertical shear force at the section
C)
the horizontal shear force between the flanges and the web plate
D)
the forces causing buckling in the web
Correct option C: the horizontal shear force between the flanges and the web plate.
Legal Metrology • 2018 • Civil Engineering Paper-I
A good building stone should not absorb water more than
A)
5 %
B)
10%
C)
20%
D)
25%
The correct choice is A (5 %), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The column with highest effective length has
A)
One end fixed and the other end free
B)
Both ends fixed
C)
Both ends hinged
D)
One end fixed and the other end hinged
The correct choice is A (One end fixed and the other end free), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
A beam is said to be loaded in pure bending if
A)
Shear force and bending moment are uniform throughout
B)
Shear force is zero and bending moment is uniform throughout
C)
Shear force can vary and bending moment is uniform throughout
D)
None of these
The correct choice is B (Shear force is zero and bending moment is uniform throughout), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
The point within the cross-sectional plane of a beam through which the resultant of the external loading on the beam has to pass through to ensure pure bending without twisting of the cross-section of the beam is called
A)
Centroid
B)
Elastic center
C)
Moment centre
D)
Shear centre
The correct choice is B (Elastic center), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
Hooke’s law is obeyed by a material with its
A)
Plastic Limit
B)
Yield Limit
C)
Limit of Proportionality
D)
Elastic limit
The correct choice is C (Limit of Proportionality), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
Slump value for mass concrete should range between
A)
0-25 mm
B)
25-50 mm
C)
50-100 mm
D)
100-175 mm
The correct choice is A (0-25 mm), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-I
For the manufacture of Portland cement, the proportions of raw materials used are
A)
lime 63%, silica 22%, other ingredients 15%
B)
lime 50%, silica 35%, other ingredients 15%
C)
lime 40%, silica 40%, other ingredients 20%
D)
all of these
Correct option A: lime 63%, silica 22%, other ingredients 15%.
Legal Metrology • 2010 • Mechanical Engineering Paper-I
Which of the following cycles uses air as the refrigerant?
A)
Ericsson
B)
Bell-Coleman
C)
Carnot
D)
Stirling
The Bell-Coleman cycle, also known as the Reversed Brayton cycle or the Air Refrigeration cycle, specifically uses air as the working fluid (refrigerant). It operates on the principle of compressing air, cooling it at constant pressure, expanding it to lower the temperature, and then absorbing heat from the space to be cooled.
Analysis of other options:
- a. Ericsson Cycle: This is a theoretical thermodynamic cycle that uses regeneration; while it can use gas, it is not the standard 'air refrigeration cycle' used in practical applications like aircraft cooling.
- c. Carnot Cycle: This is an ideal, theoretical cycle that defines the maximum possible efficiency for any heat engine or refrigerator regardless of the working fluid used.
- d. Stirling Cycle: This is a theoretical cycle used primarily for heat engines (not refrigeration) utilizing a regenerator and a gaseous working fluid, but it is not the standard cycle associated with air refrigeration systems.
