One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
4/7
11/4
9/7
All of these
Correct Answer :
A. 4/7
Related Questions
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
Isothermal process
Hyperbolic process
Adiabatic process
Polytropic process
A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum shear stress will be
-100 MPa
250 MPa
300 MPa
400 MPa
When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is
Tensile stress
Compressive stress
Shear stress
Thermal stress
The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents
Heat absorbed
Heat rejected
Either (A) or (B)
None of these
The deformation per unit length is called
Tensile stress
Compressive stress
Shear stress
Strain
The compression ratio for Diesel engines is
3 to 6
5 to 8
15 to 20
20 to 30
In the below figure, curve D represents_________.
Mild steel
Cast iron
Concrete
Bone of these
Flow stress corresponds to
Fluids in motion
Breaking point
Plastic deformation of solids
Rupture stress
The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).
Less than
Equal to
More than
None of these
When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.
0°
30°
45°
90°
The ultimate analysis of coal consists of the determination of the percentage of
Carbon
Hydrogen and nitrogen
Sulphur and ash
All of these
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)
rγ - 1
1 - rγ - 1
1 - (1/r) γ/γ - 1
1 - (1/r) γ - 1/ γ
Resilience of a material is considered when it is subjected to
Frequent heat treatment
Fatigue
Creep
Shock loading
When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce its length, then
The stress and strain induced is compressive
The stress and strain induced is tensile
Both A and B is correct
None of these
One molecule of oxygen is __________ times heavier than the hydrogen atom.
12
14
16
32
The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σx and σy) acting at a body across two mutually perpendicular planes. The normal stress on an oblique section making an angle θ with the minor principle plane is given by
OC
OP
OQ
PQ
The bending equation is
M/I = σ/y = E/R
T/J = τ/R = Cθ/l
M/R = T/J = Cθ/l
T/l= τ/J = R/Cθ
Percentage reduction in area performing tensile test on cast iron may be of the order of
50 %
25 %
20 %
30 %
The neutral axis of the cross-section a beam is that axis at which the bending stress is
Zero
Minimum
Maximum
Infinity
Which of the following statement is correct?
The increase in entropy is obtained from a given quantity of heat at a low temperature.
The change in entropy may be regarded as a measure of the rate of the availability or unavailability of heat for transformation into work.
The entropy represents the maximum amount of work obtainable per degree drop in temperature.
All of the above
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
When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum shear stress is
(σx/2) + (1/2) × √(σx² + 4 τ²xy)
(σx/2) - (1/2) × √(σx² + 4 τ²xy)
(σx/2) + (1/2) × √(σx² - 4 τ²xy)
(1/2) × √(σx² + 4 τ²xy)
An open cycle gas turbine works on
Carnot cycle
Otto cycle
Joule's cycle
Stirling cycle
The efficiency of a Carnot engine depends on
Working substance
Design of engine
Size of engine
Temperatures of source and sink
The unit of Young's modulus is
mm/mm
kg/cm
Kg
kg/cm²
Shear stress induced in a shaft subjected to tension will be
Maximum at periphery and zero at center
Maximum at center
Uniform throughout
None of the above
A cantilever beam is one which is
Fixed at both ends
Fixed at one end and free at the other end
Supported at its ends
Supported on more than two supports
The change in the unit volume of a material under tension with increase in its Poisson's ratio will
Increase
Decrease
Remain same
Increase initially and then decrease
A cycle consisting of two adiabatic and two constant pressure processes is known as
Otto cycle
Ericsson cycle
Joule cycle
Stirling cycle
Strain re-setters are used to
Measure shear strain
Measure linear strain
Measure volumetric strain
Relieve strain