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6 Month Homestudy Questions > Mechanics > Flashcards

Mechanics Flashcards

1
Q

Power formula

A

P= force x velocity

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2
Q

Work formula

A

W= force x displacement

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3
Q

Coefficient of friction formula

A

Fc= Frictional force/ normal force

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4
Q

What is a responding force called?

A

Friction

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5
Q

What is speed with direction called?

A

Velocity

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6
Q

The tendency of all objects at rest to stay at rest is called?

A

Inertia

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7
Q

What is the definition of energy?

A

The ability to do work

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8
Q

What can be considered a prime mover that converts electric energy to mechanical energy?

A

Electric motor

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9
Q

What does BTU measure?

A

Heat

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10
Q

What’s the name for when an applied force can extend and object before permanent distortion occurs?

A

The elastic limit

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11
Q

The amount of distortion produced on an object is proportional to the force applied to it for object ______ than the elastic limit.

A

Less than

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12
Q

Force per unit area is called?

A

Pressure

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13
Q

Pressure at any point in a confined fluid is distributed everywhere with or without being lessened anywhere?

A

Without being lessened

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14
Q

Absolute pressure per square inch is represented how?

A

psia

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15
Q

If a pipe was longer would the friction head (pressure loss) be greater or smaller?

A

Greater

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16
Q

What must happen for the syphon to resume flow?

A

Must be filled with liquid

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17
Q

When the effort arm on a lever is longer than the resistance arm what effect does it have?

A

Multiplies the the force

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18
Q

A fraction of what tells you a machine requires greater effort than resistance being moved?

A

Less than one but greater than 0

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19
Q

What’s the equation to find the effort to push something along an incline ramp?

A

Distance divided by height

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20
Q

The cam wedge can change ____/_____ motion to reciprocating motion.

A

Rotary/ linear

21
Q

Comparing mechanical advantage to ideal for a machine what can you determine?

A

The mechanical efficiency

22
Q

What is a combination of 2 or more machine parts working together called?

A

Mechanism

23
Q

Bell crank consists of at least ____ rotary holes and ___ fixed holes?

A

2 rotary holes and 1 fixed pivot hole

24
Q

For a lever linkage, if the longest side of a 4 bar linkage is fixed it is called ?

A

Beam-and-crank linkage

25
Q

Can and follower mechanisms convert what two typed of motions to oscillating and intermittent motion?

A

Linear and rotary

26
Q

What mechanism can lock rotating machine parts to produce rotation in one direction?

A

Ratchet and pawl mechanism

27
Q

The smaller the range of an instrument, the greater the ____?

A

sensitivity

28
Q

What is a probe with a contact element and a sensing element called?

A

Transducer

29
Q

What tachometer uses light frequency to find rpm?

A

Stroboscopic tachometer

30
Q

Flow meter with clamp on sender requires what in the liquid in order to work?

A

Bubbles or small solids

31
Q

What type of leak detector can be used to find pin hole leaks in pressurized systems?

A

Ultrasonic leak detector

32
Q

_____wrench jaws tend to slip and loosen.

A

Adjustable

33
Q

What type of saw is the basic metal cutting tool

A

Hacksaw

34
Q

What type of snips is used to cut heavy duty steel sheets?

A

Bulldog snips

35
Q

What are a pliers purpose?

A

Bending, pulling, holding, squeezing

36
Q

What type of pliers are useful when welding?

A

Locking pliers

37
Q

What type of platform should be used when working with electric power tools to prevent electric shock?

A

Insulated platform

38
Q

Using grinders you should wear what?

A

Face shield, goggled

39
Q

What has special sockets made of high grade steel?

A

Electric Impact

40
Q

Pneumatic tools should never be operated unless the bit is _____?

A

I’m contact with the work surface

41
Q

What should you do when making adjustments to power tools?

A

Unplug from power source

42
Q

Locking nuts are classified as what?

A

Prevailing-torque nuts

43
Q

Free spinning nuts must be what before locking action occurs?

A

tightened fully

44
Q

Safety wiring is a method where you two or more fasteners are wired together in a way where loosening one results in _____ the other.

A

Tightening

45
Q

Woodruff keys are machined to a half-round shape and keeps the key from____?

A

Slipping out of place

46
Q

Lead on a screw is equal to what?

A

The pitch

47
Q

What is the “lost” energy turned into for a machine?

A

Heat

48
Q

What type of wear on parts of a machine occurs when surface appears burnished to a high luster and looks irregular to the naked eye?

A

Adhesive wear

6 Month Homestudy Questions (10 decks)

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