4

Wl3 / 48EI

5Wl3 / 384EI

Wl3 / 392EI

Wl3 / 384EI

A. Wl3 / 48EI

4

The efficiency of Carnot cycle depends upon

Temperature limits

Pressure ratio

Volume compression ratio

Cut-off ratio and compression ratio

4

π /4 × τ × D³

π /16 × τ × D³

π /32 × τ × D³

π /64 × τ × D³

4

When the gas is heated at constant pressure, the heat supplied

Increases the internal energy of the gas

Increases the temperature of the gas

Does some external work during expansion

Both (B) and (C)

4

For same compression ratio and for same heat added

Otto cycle is more efficient than Diesel cycle

Diesel cycle is more efficient than Otto cycle

Efficiency depends on other factors

Both Otto and Diesel cycles are equally efficient

4

2

4

8

16

4

The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

Specific heat at constant volume

Specific heat at constant pressure

kilo-Joule

None of these

4

The ultimate analysis of coal consists of the determination of the percentage of

Carbon

Hydrogen and nitrogen

Sulphur and ash

All of these

4

The efficiency of Diesel cycle depends upon

Temperature limits

Pressure ratio

Compression ratio

Cut-off ratio and compression ratio

4

1 : 2

1 : 3

1 : 4

1 : 2.5

4

When the gas is heated at constant volume, the heat supplied

Increases the internal energy of the gas and increases the temperature of the gas

Does some external work during expansion

Both (A) and (B)

None of these

4

The product of the gas constant and the molecular mass of an ideal gas is constant

The sum of partial pressure of the mixture of two gases is sum of the two

Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules

All of the above

4

One-half

One-third

Two-third

Three-fourth

4

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

4

An open system is one in which

Heat and work crosses the boundary of the system, but the mass of the working substance does not crosses the boundary of the system

Mass of the working substance crosses the boundary of the system but the heat and work does not crosses the boundary of the system

Both the heat and work as well as mass of the working substance crosses the boundary of the system

Neither the heat and work nor the mass of the working substance crosses the boundary of the system

4

When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

Thermodynamic law

Thermodynamic process

Thermodynamic cycle

None of these

4

Stirling and Ericsson cycles are

Reversible cycles

Irreversible cycles

Semi-reversible cycles

4

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

4

A column is said to be a short column, when

Its length is very small

Its cross-sectional area is small

The ratio of its length to the least radius of gyration is less than 80

The ratio of its length to the least radius of gyration is more than 80

4

The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as

Law of equipartition of energy

Law of conservation of energy

None of these

4

Wood charcoal

Bituminous coal

Briquetted coal

None of these

4

The deformation per unit length is called

Tensile stress

Compressive stress

Shear stress

Strain

4

Select the wrong statement

A Joule cycle consists of two constant volume and two isentropic processes.

An Otto cycle consists of two constant volume and two isentropic processes.

An Ericsson cycle consists of two constant pressure and two isothermal processes.

All of the above

4

0.287 J/kgK

2.87 J/kgK

28.7 J/kgK

287 J/kgK

4

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

4

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

4

The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will

Increase

Decrease

Remain unchanged

Increase/decrease depending on application

4

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

4

If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then

The material A is more ductile than material B

The material B is more ductile than material A

The ductility of material A and B is equal

The material A is brittle and material B is ductile

4

l/δl

δl/l

l.δl

l + δl

4

0.086

1.086

1.086

4.086