Home
Current Affairs January 2024

What is the correct answer?

4

The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

A. pv = mRT

B. pv = RTm

C. pvm = C

D. pv = (RT)m

Correct Answer :

A. pv = mRT


Related Questions

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 specific heat at constant volume is

A. The amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure

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

C. The amount of heat required to raise the temperature of 1 kg of water through one degree

D. Any one of the above

What is the correct answer?

4

Which of the following statement is correct?

A. The heat and work are boundary phenomena

B. The heat and work represent the energy crossing the boundary of the system

C. The heat and work are path functions

D. All of the above

What is the correct answer?

4

A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

A. Same

B. Lower

C. Higher

D. None of these

What is the correct answer?

4

If Th is the torque resisting capacity of a hollow shaft and Ts is that of a solid shaft, of the same material, length and weight. Then,

A. Th > Ts

B. Th < Ts

C. Th = Ts

D. None of these

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

What is the correct answer?

4

The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

A. Enthalpy

B. Internal energy

C. Entropy

D. External energy

What is the correct answer?

4

The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends.

A. Equal to

B. More than

C. Less than

D. None of these

What is the correct answer?

4

The heating of a gas at constant pressure is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. Avogadro's law

What is the correct answer?

4

The energy absorbed in a body, when it is strained within the elastic limits, is known as

A. Strain energy

B. Resilience

C. Proof resilience

D. Modulus of resilience

What is the correct answer?

4

The fuel mostly used in steam boilers is

A. Brown coal

B. Peat

C. Coking bituminous coal

D. Non-coking bituminous coal

What is the correct answer?

4

Principal planes are planes having

A. Maximum shear stress

B. No shear stress

C. Minimum shear stress

D. None of the above

What is the correct answer?

4

The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.

A. Equal to

B. Less than

C. Greater than

D. None of these

What is the correct answer?

4

The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

A. wl/4

B. wl/2

C. wl

D. wl²/2

What is the correct answer?

4

The extremeties of any diameter on Mohr's circle represent

A. Principal stresses

B. Normal stresses on planes at 45°

C. Shear stresses on planes at 45°

D. Normal and shear stresses on a plane

What is the correct answer?

4

Which of the following gas has a minimum molecular mass?

A. Oxygen

B. Nitrogen

C. Hydrogen

D. Methane

What is the correct answer?

4

The efficiency and work ratio of a simple gas turbine cycle are

A. Low

B. Very low

C. High

D. Very high

What is the correct answer?

4

The value of one bar (in S. I. units) is equal to

A. 1 × 102 N/m2

B. 1 × 103 N/m2

C. 1 × 104 N/m2

D. 1 × 105 N/m2

What is the correct answer?

4

A cylindrical section having no joint is known as

A. Joint less section

B. Homogeneous section

C. Perfect section

D. Seamless section

What is the correct answer?

4

The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is

A. In the vertical plane

B. In the horizontal plane

C. In the same plane in which the beam bends

D. At right angle to the plane in which the beam bends

What is the correct answer?

4

The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

A. Carnot cycle can't work with saturated steam

B. Heat is supplied to water at temperature below the maximum temperature of the cycle

C. A Rankine cycle receives heat at two places

D. Rankine cycle is hypothetical

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

Flow stress corresponds to

A. Fluids in motion

B. Breaking point

C. Plastic deformation of solids

D. Rupture stress

What is the correct answer?

4

The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. All of these

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

Modulus of rigidity may be defined as the ratio of

A. Linear stress to lateral strain

B. Lateral strain to linear strain

C. Linear stress to linear strain

D. Shear stress to shear strain

What is the correct answer?

4

A molecule consisting of one atom is known as

A. Mono-atomic

B. Di-atomic

C. Tri-atomic

D. Poly-atomic

What is the correct answer?

4

Which of the following is correct?

A. Absolute pressure = Gauge pressure + Atmospheric pressure

B. Gauge pressure = Absolute pressure + Atmospheric pressure

C. Atmospheric pressure = Absolute pressure + Gauge pressure

D. Absolute pressure = Gauge pressure - Atmospheric pressure

What is the correct answer?

4

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

A. 0.5 s.l.σt

B. s.l.σt

C. √2 s.l.σt

D. 2.s.l.σt

What is the correct answer?

4

A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called

A. Isothermal process

B. Hyperbolic process

C. Adiabatic process

D. Polytropic process