#
The domain Memorize.com is for sale!
contact: craig AT memorize.com

# Made e mech

rename
andsy's
version from
2019-10-08 11:35

## Section

Question | Answer |
---|---|

Poise or dyne-sec/cm² | 0.1 N-sec/m² or pascal - sec |

1 stoke or cm²/sec | 10^-4 m²/sec |

Ideal fluid | is said to be an ideal if it is assumed to be both incompressible and non viscous infinite bulk modulus no surface tension |

Real fluid | have viscosity finite compressibility and surface tension |

Specific volume is inverse of density

Specific gravity or relative density is ratio of density of fluid and density of standard fluid 1/4C 13.6 Hg

Due to viscosity of fluid of a resistance to flow

viscosity of liquids decreases with temperature

viscosity of gases increases with increase in temperature

Viscosity of water is at 1 degree Celsius is 1 centipoise

Viscosity of liquids is due to cohesion and molecular momentum transfer

Non newtonian fluid with time independent are the dilatent bingham plastic psuedo plastic

Non-newtonian flude with time dependent thixotropic and rheopectic

Question | Answer |
---|---|

For Dilatant Fluids: n > 1& B=0. | Butter, Quick sand. |

For Bingham Plastic Fluids: n 1 & B 0 | Ex Sewage sludge. Drilling mud, tooth paste and gel. |

(ii) For Pseudoplastic Fluids: n < 1 & B 0 | Ex. Paper pulp, Rubber solution Lipsticks, Paints, Blood Polymetric solutions etc. |

(iv) For Thixotropic Fluids: n < 1 & B 0 | Viscosity increases with time Ex. Printers ink and Enamels. |

(v) For Rheopectic Fluids: n > 1 & B 0 | Viscosity decreases with time. Ex Gypsum solution in water & Bentonite solution |

Question | Answer |
---|---|

Kä | yKt |

Question | Answer |
---|---|

Surface Tension at water 20C | 0.0736 N/m |

Question | Answer |
---|---|

Capillary action | isdue to addition and cohesion both |

angle of contact between the liquid and the material for Mercury and glass is 128

At critical point, Liquid-vapour state are same thus surface tension is equal to zero

Surface tension is due to cohesion only

Barometer shows atmospheric pressure

Question | Answer |
---|---|

1 kgf | 9.81 N |

Absolute pressure is equal to the sum of gauge pressure and local atmospheric pressure

Gauze pressure can be positive negative or zero

Atmospheric pressure is equal to 1.013 baraur 10.3 metres of height of water for 76 cm height of Mercury

Piezometer is suitable for small and positive pressure measurement

The manometric liquid should have high density in vapour pressure

simple manometer can measure both positive and negative pressure

aneroid barometer is used to measure local atmospheric pressure on absolute scale

Air density is equal to 1.24 kg/m³

Question | Answer |
---|---|

Center of pressure | center of gravity in case of vertical surface when depth of immersion is very large |

eulerian concept is for a particular section or point.

## Pages linking here (main versions and versions by same user)

No other pages link to this page. See Linking Quickstart for more info.