Home
Current Affairs January 2024

What is the correct answer?

4

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

A. Carbon

B. Hydrogen and nitrogen

C. Sulphur and ash

D. All of these

Correct Answer :

D. All of these


Related Questions

What is the correct answer?

4

For same compression ratio and for same heat added

A. Otto cycle is more efficient than Diesel cycle

B. Diesel cycle is more efficient than Otto cycle

C. Efficiency depends on other factors

D. Both Otto and Diesel cycles are equally efficient

What is the correct answer?

4

The total strain energy stored in a body is termed a

A. Resilience

B. Proof resilience

C. Modulus of resilience

D. Toughness

What is the correct answer?

4

The amount of heat generated per kg of fuel is known as

A. Calorific value

B. Heat energy

C. Lower calorific value

D. Higher calorific value

What is the correct answer?

4

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

A. Young's modulus

B. Bulk modulus

C. Modulus of rigidity

D. Modulus of elasticity

What is the correct answer?

4

The intensity of stress which causes unit strain is called

A. Unit mass

B. Modulus of rigidity

C. Bulk modulus

D. Modulus of Elasticity

What is the correct answer?

4

The gas turbine cycle with regenerator improves

A. Thermal efficiency

B. Work ratio

C. Avoids pollution

D. None of these

What is the correct answer?

4

A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

A. 30 kJ

B. 54 kJ

C. 84 kJ

D. 114 kJ

What is the correct answer?

4

One molecule of oxygen consists of __________ atoms of oxygen.

A. 2

B. 4

C. 8

D. 16

What is the correct answer?

4

A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the

A. Axis of load

B. Perpendicular to the axis of load

C. Maximum moment of inertia

D. Minimum moment of inertia

What is the correct answer?

4

The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)

A. t

B. 2t

C. 4t

D. 8t

What is the correct answer?

4

Which of the following is an intensive property of a thermodynamic system?

A. Volume

B. Temperature

C. Mass

D. Energy

What is the correct answer?

4

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

A. Increase

B. Decrease

C. Remain unchanged

D. Increase/decrease depending on application

What is the correct answer?

4

The maximum bending moment for the beam shown in the below figure, is

A. wl²/3√3

B. wl²/6√3

C. wl²/9√3

D. wl²/12√3

What is the correct answer?

4

Which of the following process can be made reversible with the help of a regenerator?

A. Constant pressure process

B. Constant volume process

C. Constant pvn process

D. All of these

What is the correct answer?

4

Which is the false statement about true stress strain method?

A. It does not exist

B. It is more sensitive to changes in both metallurgical and mechanical conditions

C. It gives a more accurate picture of the ductility

D. It can be correlated with stress strain values in other tests like torsion, impact, combined stress tests etc.

What is the correct answer?

4

When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

A. Equal to

B. Directly proportional to

C. Inversely proportional to

D. Independent of

What is the correct answer?

4

The behaviour of super-heated vapour is similar to that of

A. Perfect gas

B. Air

C. Steam

D. Ordinary gas

What is the correct answer?

4

The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called

A. Specific heat at constant volume

B. Specific heat at constant pressure

C. Kilo Joule

D. None of these

What is the correct answer?

4

In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

A. Isothermal

B. Isentropic

C. Polytropic

D. None of these

What is the correct answer?

4

If in the equation pvn = C, the value of n = ∝, then the process is called

A. Constant volume process

B. Adiabatic process

C. Constant pressure process

D. Isothermal process

What is the correct answer?

4

When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

A. Zero

B. 1/5

C. 4/5

D. 1

What is the correct answer?

4

When a gas is heated, change takes place in

A. Pressure

B. Volume

C. Temperature

D. All of these

What is the correct answer?

4

According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.

A. Remains constant

B. Increases

C. Decreases

D. None of these

What is the correct answer?

4

The variables which control the physical properties of a perfect gas are

A. Pressure exerted by the gas

B. Volume occupied by the gas

C. Temperature of the gas

D. All of these

What is the correct answer?

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

A. The material A is more ductile than material B

B. The material B is more ductile than material A

C. The ductility of material A and B is equal

D. The material A is brittle and material B is ductile

What is the correct answer?

4

Kelvin-Planck's law deals with

A. Conservation of work

B. Conservation of heat

C. Conversion of heat into work

D. Conversion of work into heat

What is the correct answer?

4

Stirling and Ericsson cycles are

A. Reversible cycles

B. Irreversible cycles

C. Semi-reversible cycles

D. Adiabatic irreversible cycles

What is the correct answer?

4

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (δ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)

A. WD3n/Cd⁴

B. 2WD3n/Cd⁴

C. 4WD3n/Cd⁴

D. 8WD3n/Cd⁴

What is the correct answer?

4

A cycle consisting of two isothermal and two isentropic processes, is known as

A. Carnot cycle

B. Stirling cycle

C. Ericsson cycle

D. Joule cycle

What is the correct answer?

4

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

A. 0.086

B. 1.086

C. 1.086

D. 4.086