One molecule of oxygen is __________ times heavier than the hydrogen atom.
12
14
16
32
Correct Answer :
D. 32
Related Questions
Formula based on IS codes is based on
Straight line formula
Eulers formula
Rankines formula
Secant formula
In an irreversible process, there is a
Loss of heat
No loss of heat
Gain of heat
No gain of heat
The change of entropy, when heat is absorbed by the gas, is
Positive
Negative
Positive or negative
None of these
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
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
The heat and mechanical energies are mutually convertible. This statement was established by
Boyle
Charles
Joule
None of these
A key is subjected to side pressure as well at shearing forces. These pressures are called
Bearing stresses
Fatigue stresses
Crushing stresses
Resultant stresses
The hard coke is obtained when carbonisation of coal is carried out at
300° to 500°C
500° to 700°C
700° to 900°C
900° to 1100°C
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
When a gas is heated, change takes place in
Pressure
Volume
Temperature
All of these
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
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
Cracking
Carbonisation
Fractional distillation
Full distillation
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 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
The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to
Young's modulus
Bulk modulus
Modulus of rigidity
Modulus of elasticity
The neutral axis of the cross-section a beam is that axis at which the bending stress is
Zero
Minimum
Maximum
Infinity
Workdone in a free expansion process is
Zero
Minimum
Maximum
Positive
In a steady flow process, the ratio of
Heat transfer is constant
Work transfer is constant
Mass flow at inlet and outlet is same
All of these
The compression ratio for petrol engines is
3 to 6
5 to 8
10 to 20
15 to 30
The buckling load for a given material depends on
Slenderness ratio and area of cross-section
Poisson's ratio and modulus of elasticity
Slenderness ratio and modulus of elasticity
Slenderness ratio, area of cross-section and modulus of elasticity
The gas turbine cycle with regenerator improves
Thermal efficiency
Work ratio
Avoids pollution
None of these
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
The columns whose slenderness ratio is less than 80, are known as
Short columns
Long columns
Weak columns
Medium columns
In open cycle gas turbine plants
The indirect heat exchanger and cooler is avoided
Direct combustion system is used
A condenser is used
All of the above
The efficiency of Ericsson cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
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
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
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
Atomisation
Carbonisation
Combustion
None of these
The isothermal and adiabatic processes are regarded as
Reversible process
Irreversible process
Reversible or irreversible process
None of these
The efficiency of Stirling cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
None of these