Proof resilience per material is known as
Resilience
Proof resilience
Modulus of resilience
Toughness
Correct Answer :
C. Modulus of resilience
Related Questions
A riveted joint in which the number otrivets decrease from innermost to outer most rows is called
Chain riveted joint
Diamond riveted joint
Crisscross riveted joint
Zigzag riveted joint
Diesel cycle consists of __________ processes.
Two constant volume and two isentropic
Two constant pressure and two isentropic
Two constant volume and two isothermal
One constant pressure, one constant volume and two isentropic
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)
pv = mRT
pv = RTm
pvm = C
pv = (RT)m
One molecule of oxygen consists of __________ atoms of oxygen.
2
4
8
16
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
Element
Compound
Atom
Molecule
Diamond riveted joint can be adopted in the case of following type of joint
Butt joint
Lap joint
Double riveted lap joints
All types of joints
In an irreversible process, there is a
Loss of heat
No loss of heat
Gain of heat
No gain of heat
The efficiency of Stirling cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
None of these
A fletched beam is used to
Change the shape of the beam
Effect the saving in material
Equalise the strength in tension and compression
Increase the cross-section of the beam
When a perfect gas is expanded through an aperture of minute dimensions, the process is known as
Isothermal process
Adiabatic process
Free expansion process
Throttling process
The __________ is obtained when carbonisation of coal is carried out at 500° to 700° C.
Soft coal
Hard coal
Pulverised coal
Bituminous coal
A composite bar made up of steel and copper bars of equal lengths are heated through 100°C. The stresses developed shall be
Tensile in both the material
Tensile in steel and compressive in copper
Compressive in steel and tensile in copper
Compressive in both the materials
When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then minimum normal stress is
(σx + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]
(σx + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]
(σx - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]
(σx - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]
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 assumption made in Euler's column theory is that
The failure of column occurs due to buckling alone
The length of column is very large as compared to its cross-sectional dimensions
The column material obeys Hooke's law
All of the above
The efficiency and work ratio of a simple gas turbine cycle are
Very low
Low
High
Very high
The strain energy stored in a solid circular shaft in torsion, 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 unit of energy is S. I. units is
Joule (J)
Joule metre (Jm)
Watt (W)
Joule/metre (J/m)
Which of the following statement is wrong?
The closed cycle gas turbine plants are external combustion plants.
In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.
In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.
Otto cycle consists of following four processes
Two isothermals and two isentropic
Two isentropic and two constant volumes
Two isentropic, one constant volume and one constant pressure
Two isentropic and two constant pressures
For a beam, as shown in the below figure, when the load W is applied in the centre of the beam, the maximum deflection is
Wl3 / 48EI
5Wl3 / 384EI
Wl3 / 392EI
Wl3 / 384EI
The variables which control the physical properties of a perfect gas are
Pressure exerted by the gas
Volume occupied by the gas
Temperature of the gas
All of these
A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
Uniform throughout
Increase uniformly
First increase and then decrease
Increase uniformly first and then increase rapidly
The ratio of the largest load in a test to the original cross-sectional area of the test piece is called
Elastic limit
Yield stress
Ultimate stress
Breaking stress
The weakest section of a diamond riveting is the section which passes through
The first row
The second row
The central row
One rivet hole of the end row
Carnot cycle has maximum efficiency for
Petrol engine
Diesel engine
Reversible engine
Irreversible engine
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
v1/v2
v2/v1
(v1 + v2)/v1
(v1 + v2)/v2
Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Kinetic theory of gases
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that
Carnot cycle can't work with saturated steam
Heat is supplied to water at temperature below the maximum temperature of the cycle
A Rankine cycle receives heat at two places
Rankine cycle is hypothetical
Carbonisation of coal consists of
Drying and crushing the coal to a fine powder
Moulding the finely ground coal under pressure with or without a binding material
Heating the wood with a limited supply of air to temperature not less than 280°C
None of the above