Prelim Preperation Flashcards

1
Q

When a Single Acting cylinder instrokes, does it create a force?

A

No, it creates a force when it outstrokes.

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2
Q

The size of the force produced by a Single Acting cylinder depends on what two things?

A

The air pressure supplied and The surface area of the piston.

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3
Q

Is it a single acting cylinder or a double acting cylinder that has a spring?

A

Single Acting Cylinder.

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4
Q

What is Air Pressure measured in?

A

Bars or N/mm2 (Newtons per squared millimetre)

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5
Q

How do you calculate the surface area of a piston?

A

π x Radius² ( πx R²)

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6
Q

What is the calculation used to find the force of a Single Acting cylinder?

A

Force = Pressure x Area

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7
Q

During the outstroke, does the compressed air push against the surface area of the piston in the same way as the Single Acting?

A

Yes it does.

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8
Q

During the instroke, is the surface area reduced because of the piston rod?

A

Yes it is.

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9
Q

How do you find the effective area of a Double Acting cylinder?

A

Effective area = Piston Area - Piston Rod Area (Ae = Ap - Apr)

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10
Q

Movement Multiplier Ratio - Is the formula for MMR Driven/Driver or Driver/Driven?

A

The MMR is Driven/Driver

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11
Q

Why do we use Idler Gears?

A

To get the DRIVEN Gear to rotate in the same direction as the DRIVER.

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12
Q

2 Important things about Idler Gears?

A
  1. It has no effect on the MMR of the system. 2. The size of the Idler Gear is not important but it is normally small.
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13
Q

How do you calculate Force/Weight?

A

Force = Mass x Gravity (F = MG)

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14
Q

What are the four main types of Energy?

A

Kinetic, Potential, Electrical, and Heat.

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15
Q

What is Kinetic Energy?

A

It is the Energy of Movement.

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16
Q

What is Potential Energy?

A

It is Energy stored in a static object.

17
Q

What is Electrical Energy?

A

Electrical energy is energy that is stored in charged particles within an electric field.

18
Q

What is Heat Energy?

A

It is the Energy transferred to a body that results in a change in the body’s temperature.

19
Q

How do you calculate Kinetic Energy?

A

Ek = 0.5 x mv²

20
Q

How do you calculate Potential Energy?

A

Ep = mgh

21
Q

How do you calculate Electrical Energy?

A

Ee = ItV

22
Q

How do you calculate Heat Energy?

A

Eh = mc ΔT

23
Q

How do you calculate Energy Transfer?

A

E = Ek2 = (Ep2 + Ek1) = Ep1

24
Q

How do you calculate efficiency?

A

η = Eout/Ein

25
Q

In a parallel circuit does the voltage remain same at every point?

A

Yes, it is in a series circuit that the voltage changes.

26
Q

What is resistance measured in?

A

Ohms (Ω)