Tag: fluids

Quizzes (14) Questions (63)

Questions Related to fluids

Multiple choice various types of barometer fluids physics

Atmospheric pressure decreases by $1cm$ of mercury for every

  1. $125m$ increase in altitude
  2. $125m$ decrease in altitude
  3. $75m$ increase in altitude
  4. $75m$ decrease in altitude
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The atmospheric pressure decreases by $1cm$ for every $125m$ increase in height.

Multiple choice various types of barometer fluids physics

The vertical height of mercury in a simple barometer is ________  the area of cross-section of barometer tube.

  1. independent of

  2. dependent on

  3. can't say

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

No, it doesn't depend on the cross-section of the tube.

Multiple choice various types of barometer fluids physics

The fluid used in aneroid barometer is 

  1. water

  2. mercury

  3. air

  4. alcohol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An aneriod  barometer is made up of a vacuum chamber covered by a thin elastic disk. High atmospheric pressure pushes against the disk and causes it to bulge inward, while low pressure does not push as hard, allowing the disk to bulge outward.

Multiple choice various types of barometer fluids physics

Fortin's Barometer is used to measure.

  1. Force

  2. Atmospheric pressure

  3. Temperature

  4. All
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fortin's barometer is used to measure atmospheric pressure. It is a modified form of Torricelli's simple barometer.

Multiple choice various types of barometer fluids physics
Fluid used in Aneroid barometer is

  1. Mercury

  2. Glycerine

  3. Kerosene

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The word 'aneroid' means dry. They are called dry because they do not use any fluid in them. They work on the bulging and compression of diaphragm.

Multiple choice various types of barometer fluids physics

Most commonly known barometric fluid is

  1. Mercury

  2. Liquid oxygen

  3. Nitrogen

  4. Ammonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first reason to use mercury is its high density. The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by $h\rho g$.

Due to high value of $\rho$ the same pressure can be measured for smaller value of $h$.
Also the vapor pressure of mercury is negligible, due to which the barometric height is not affected.

Multiple choice various types of barometer fluids physics
Aneroid word in Aneroid barometer means

  1. Wet

  2. Moist

  3. Dry

  4. Overflowing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

'Aneroid' means dry. Aneroid barometers are those barometers that do no require any fluid to work and measure atmospheric pressure. Hence they are called dry barometers due to this absence of any fluid(specially liquid).

Multiple choice various types of barometer fluids physics

If we use water, instead of mercury, as a barometric liquid,

  1. the glass tube needs to be much longer

  2. the glass tube needs to be of same length

  3. the glass tube needs to be much shorter

  4. the glass tube needs to be narrower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury is the heaviest liquid. Therefore, it rises only to a height of $76cm$ to balance the atmospheric pressure. Water, being $13.6$ times lighter than mercury, will rise to a $13.6$ times larger height. So, the glass tube needs to be much longer.

Multiple choice various types of barometer fluids physics

 ______ is used as barometric liquid as it does not vaporise under vacuum condition.

  1. water

  2. air

  3. Mercury

  4. petrol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

True. Mercury is used as barometric liquid because it does not vaporise under vacuum condition.

Multiple choice various types of barometer fluids physics

Mark the correct advantage of fortin's barometer.

  1. It is portable

  2. It a makes move accurate reading than simple barometer

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fortin's barometer is widely used in laboratories and in meteorological departments. Main advantage of Fortin's barometer is it is portable and it allows the mercury level in the cistern to be set to zero. this makes the reading move accurate.