29 NOVEMBER 2020 CURRENT AFFAIRS QUIZ

Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure

Volume

Entropy

Mass

Enthalpy

TRUE ANSWER : ?
YOUR ANSWER : ?

A sudden fall in the barometer reading is a sign of approaching

Rains

Cold wave

Fine weather

Storm

TRUE ANSWER : ?
YOUR ANSWER : ?

The main cause for the irreversibility is

Unrestricted expansion

All of these

Mechanical and fluid friction

Heat transfer with a finite temperature difference

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.

One-third

Three-forth

Two-third

One-half

TRUE ANSWER : ?
YOUR ANSWER : ?

The efficiency of a gas turbine is given by

(Net work output)/(Heat supplied)

(Actual temperature drop)/(Isentropic temperature drop)

(Net work output)/(Work-done by the turbine)

(Isentropic increase in temperature)/(Actual increase in temperature)

TRUE ANSWER : ?
YOUR ANSWER : ?

According to which law, all perfect gases change in volume by 1/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant

Joule's law

Charles' law

Gay Lussac’s law

Boyle's law

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is

Greater than one

Equal to one

Less than one

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Stirling cycle consists of

Two constant pressure and two isothermal processes

One constant volume, one constant pressure and two isentropic processes

Two constant volume and two isentropic processes

Two constant volume and two isothermal processes

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by

Kelvin

Gay-Lussac

Joule

Clausis

TRUE ANSWER : ?
YOUR ANSWER : ?

For which of the following substances, the gas laws can be used with minimum error

Dry steam

Saturated steam

Wet steam

Superheated steam

TRUE ANSWER : ?
YOUR ANSWER : ?