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FD SC 405 > Exam One > Flashcards

Exam One Flashcards

1
Q

What are the dimensions and units for force?

A

Dimensions: Mx(L/t^2)
Units: kg x (m/s^2) or Newtons

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2
Q

What are the dimensions and units for work?

A

Dimensions: Mx(L/t^2) x L
Units: kg x (m/s^2) x m or N-m or Joules

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3
Q

What are the dimensions and units for power?

A

Dimensions: Mx(L^2/t^3)
Units: kg x (m^2/s^3) or J/s or Watts

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4
Q

What are the dimensions and units for pressure?

A

Dimensions: (MxL/t^2)/M^2
Units: (kg^3xL/t^2) or N/m^2 or Pascals

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5
Q

What are the dimensions and units for viscosity?

A

Dimensions: (MxL/t^2)/(t^3/M^2)
Units: kg/mxs or Pascal seconds

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6
Q

How do you calculate moisture content on a dry basis?

A

Mass of moisture/mass of dry product

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7
Q

How do you calculate moisture content on a wet basis?

A

Mass of moisture/mass of wet product

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8
Q

How do you convert from a wet basis to a dry basis?

A

Wet basis/1-wet basis

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9
Q

How do you convert from a dry basis to a wet basis?

A

Dry basis/1+dry basis

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10
Q

How do you calculate sensible heat?

A

mass x specific heat x temperature change

Change in temperature

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11
Q

How do you calculate latent heat?

A

mass x latent heat of vaporization/crystallization

Change in phase

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12
Q

How do you calculate latent heat of vaporization and crystallization?

A

V: enthalpy difference between steam and liquid
C: enthalpy difference between liquid and ice

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13
Q

How do you find the enthalpy of a third temperature when given two other temperatures and their enthalpies?

A

HT1+((HT2-HT1)/T2-T1)*T3-T1

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14
Q

How do you find the viscosity using a capillary tube?

A

(pichange in pressureradius^4)/8lengthvolumetric flow rate

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15
Q

How do you find the viscosity using a rotational viscometer?

A

torque/(8pi^2NLinside radius^2)

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16
Q

How do you calculate Reynolds number?

A

(velocitydiameterdensity)/viscosity

17
Q

What is Darcy’s equation?

A

(change in pressure/density)=2friction factorlength*(viscosity^2/diameter)

18
Q

How do you calculate the volumetric flow rate?

A

CS area x average velocity

19
Q

How do you calculate the mass flow rate?

A

volumetric flow rate x density

20
Q

How do you calculate Reynolds number when it is in laminar flow?

A

16/Reynolds number

21
Q

How do you calculate relative roughness factor?

A

roughness/diameter

22
Q

How do you calculate energy requirements for a pump?

A

(change in pressure/density)+1/2(u2^2-u1^2)+g(z2-z1)+(2fu^2L)/D+Cf*(u^2/2)

23
Q

How do you calculate the power requirements of a pump?

A

mass flow rate x energy requirements

FD SC 405 (9 decks)

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