Which of the following statement is incorrect?
The liquid fuels consist of hydrocarbons.
The liquid fuels have higher calorific value than solid fuels.
The solid fuels have higher calorific value than liquid fuels.
A good fuel should have low ignition point.
Correct Answer :
C. The solid fuels have higher calorific value than liquid fuels.
Related Questions
Modulus of rigidity is defined as the ratio of
Longitudinal stress to longitudinal strain
Volumetric stress to volumetric strain
Lateral stress to Lateral strain
Shear stress to shear strain
The efficiency and work ratio of a simple gas turbine cycle are
Low
Very low
High
Very high
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
When the expansion or compression takes place according to the law pvn = C, the process is known as
Isothermal process
Adiabatic process
Hyperbolic process
Polytropic process
The entropy __________ in an irreversible cyclic process.
Remains constant
Decreases
Increases
None of these
The efficiency of Stirling cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
None of these
In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
Isothermal
Isentropic
Polytropic
None of these
The amount of heat generated per kg of fuel is known as
Calorific value
Heat energy
Lower calorific value
Higher calorific value
Carnot cycle has maximum efficiency for
Petrol engine
Diesel engine
Reversible engine
Irreversible engine
Charles' law states that all perfect gases change in volume by __________ of its original volume at 0°C for every 1°C change in temperature, when pressure remains constant.
1/27th
1/93th
1/173th
1/273th
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 ultimate tensile stress of mild steel compared to ultimate compressive stress is
Same
More
Less
Unpredictable
The absolute zero temperature is taken as
237°C
-273°C
-237°C
273°C
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
None of the above
Which of the following is an irreversible cycle?
Carnot
Stirling
Ericsson
None of the above
The change of entropy, when heat is absorbed by the gas, is
Positive
Negative
Positive or negative
None of these
The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
Equal to
Half
Double
Quadruple
In a free expansion process,
W1 - 2 = 0
Q1 - 2 = 0
dU = 0
All of these
In compression test, the fracture in cast iron specimen would occur along
The axis of load
An oblique plane
At right angles to the axis of specimen
Would not occur
The sum of internal energy (U) and the product of pressure and volume (p.v) is known as
Workdone
Entropy
Enthalpy
None of these
The neutral axis of the cross-section a beam is that axis at which the bending stress is
Zero
Minimum
Maximum
Infinity
The efficiency of the Carnot cycle may be increased by
Increasing the highest temperature
Decreasing the highest temperature
Increasing the lowest temperature
Keeping the lowest temperature constant
The relation between equivalent length (L) and actual length (l) of a column for both ends fixed is
L = l/2
L = l/√2
L = l
L = 2l
Flow stress corresponds to
Fluids in motion
Breaking point
Plastic deformation of solids
Rupture stress
The entropy may be expressed as a function of
Pressure and temperature
Temperature and volume
Heat and work
All of these
The shape of cantilever for uniformly distributed load will be
Straight line
Parabolic
Elliptical
Cubic
Which of the following is correct?
Absolute pressure = Gauge pressure + Atmospheric pressure
Gauge pressure = Absolute pressure + Atmospheric pressure
Atmospheric pressure = Absolute pressure + Gauge pressure
Absolute pressure = Gauge pressure - Atmospheric pressure
Strain re-setters are used to
Measure shear strain
Measure linear strain
Measure volumetric strain
Relieve strain
A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as
Cracking
Carbonisation
Fractional distillation
Full distillation
The efficiency of Carnot cycle is maximum for
Gas engine
Petrol engine
Steam engine
Reversible engine