A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as
Chain riveted joint
Diamond riveted joint
Crisscross riveted joint
Zigzag riveted joint
Correct Answer :
A. Chain riveted joint
Related Questions
The condition for the reversibility of a cycle is
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All the processes, taking place in the cycle of operation, must be extremely slow
The working parts of the engine must be friction free
All of the above
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is
1/8
1/4
1/2
2
The atomic mass of sulphur is
12
14
16
32
For the beam shown in the below figure, the shear force diagram between A and B is
A horizontal line
A vertical line
An inclined line
A parabolic curve
The strain energy stored in a solid circular shaft subjected to shear stress (τ), is: (Where G = Modulus of rigidity for the shaft material)
τ²/ 2G × Volume of shaft
τ/ 2G × Volume of shaft
τ²/ 4G × Volume of shaft
τ/ 4G × Volume of shaft
The point of contra flexure is a point where
Shear force changes sign
Shear force is maximum
Bending moment changes sign
Bending moment is maximum
The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.
Greater than
Less than
Equal to
None of these
The atomic mass of nitrogen is __________ oxygen.
Equal to
Less than
More than
None of these
In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.
Same as
Less than
Greater than
None of these
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.
Change
Do not change
Both (A) and (B)
None of these
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
Combustion is at constant volume
Expansion and compression are isentropic
Maximum temperature is higher
Heat rejection is lower
One molecule of oxygen is __________ times heavier than the hydrogen atom.
12
14
16
32
The value of one bar (in S. I. units) is equal to
1 × 102 N/m2
1 × 103 N/m2
1 × 104 N/m2
1 × 105 N/m2
The most probable velocity of the gas molecules is given by
√(KT/m)
√(2KT/m)
√(3KT/m)
√(5KT/m)
The volumetric or molar specific heat at constant pressure is the product of
Molecular mass of the gas and the specific heat at constant volume
Atomic mass of the gas and the gas constant
Molecular mass of the gas and the gas constant
None of the above
Stirling and Ericsson cycles are
Reversible cycles
Irreversible cycles
Semi-reversible cycles
Adiabatic irreversible cycles
The fuel mostly used in steam boilers is
Brown coal
Peat
Coking bituminous coal
Non-coking bituminous coal
The principal constituents of a fuel are
Carbon and hydrogen
Oxygen and hydrogen
Sulphur and oxygen
Sulphur and hydrogen
A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the
Axis of load
Perpendicular to the axis of load
Maximum moment of inertia
Minimum moment of inertia
The ratio of molar specific heats for mono-atomic gas is
1
1.4
1.67
1.87
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
Element
Compound
Atom
Molecule
Which of the following process can be made reversible with the help of a regenerator?
Constant pressure process
Constant volume process
Constant pvn process
All of these
Proof resilience per material is known as
Resilience
Proof resilience
Modulus of resilience
Toughness
During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is
4 tonnes/ cm²
8 tonnes/ cm²
16 tonnes/ cm²
22 tonnes/ cm²
Tensile strength of a material is obtained by dividing the maximum load during the test by the
Area at the time of fracture
Original cross-sectional area
Average of (A) and (B)
Minimum area after fracture
The efficiency of Joule cycle is
Greater than Carnot cycle
Less than Carnot cycle
Equal to Carnot cycle
None of these
The polytropic index (n) is given by
log (p1p2)/log (v1v2)
log (p2/ p1)/log (v1/ v2)
log (v1/ v2)/ log (p1/p2)
log [(p1v1)/(p2v2)]
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
0
1
γ
∝
Stirling cycle consists of
Two constant volume and two isentropic processes
Two constant volume and two isothermal processes
Two constant pressure and two isothermal processes
One constant volume, one constant pressure and two isentropic processes
Which of the following has the highest calorific value?
Peat
Lignite
Bituminous coal
Anthracite coal