Measure Flashcards
For very precise angle measurements, degrees are divided into _____ and ______.
Minutes and seconds
The force of gravity on an object is its _____. The measure of how much matter is in an object is its _______.
weight, mass
If a force of 250lbs acts on a an object and moves it 10feet, how much work has been done?
2500ft lbs (W=FxD)
The rate at which work is done is called _______. It is measured in __________.
Power, foot-pounds per second
The amount of work a particle can do in going from a negative plate to a positive plate, divided by the amount of electrical (?)
Potential difference
What kind of charge does an electron carry?
Negative
The number of electrons inside a battery is always
Constant
Electrical energy per unit of charge is measured in
VOLTS
Potential difference is the difference in electrical _______ between two plates.
- Charge
- Current
- Potential Energy
- Resistance
Potential energy
One joule per second is called one
- Amp
- Ohm
- Volt
- Watt
Watt
SI base units include length, mass, time, temperature, and ______.
Electric current
The prefix “milli” indicates one…
Thousandth
The ampere is the SI base unit for measurements of
current
When should you convert metric measurements to standard US measurements?
As rarely as possible
Work is the product of force and _________. It is expressed in ________.
Distance; Joules
What is the decimal equivalent to 5/8”?
0.6250
In a clearance fit, two parts fit together
With a little room to spare
Which tool is used in layout work for scribing circles and transferring dimensions between a scale and the work?
- divider
- micrometer
- scriber
- vernier
Divider
What is the reading on the vernier scale below?
3.059
A vernier scale indicates zero when _______ align with marks on the main scale
Both ends
A balanced dial on a dial indicator is graduated in ______ direction(s) from zero. It is used for _______-way comp(?)
both; two
If the hole is too large, which end(s) of a “go, no-go” plug gauge will fit into the hole?
Both ends
Surface roughness is measured in
- Centimeters
- microinches
- millimeters
- nanoinches
Microinches
During production, the harness of small parts is often checked by means of the highly sensitive _________ hardness test.
Vickers
X-ray equipment is used for making ________ inspections of manufactured parts.
Internal
The maximum slope at which a pile of loose material will stay without sliding is called the angle of
- readjustment
- recline
- repose
- rest
Repose
The area of a parallelogram is measured in?
Ft^2
Which of the following is the best approximation of the value of pi?
3.14159
On earth’s surface, the strength of gravity generally is _________ at low elevations, and ________ at high elevations. At the center of the earth it ______.
Strongest, weakest, is zero
How many board feet of lumber are there in 150 running feet of 2 x 4 inch studs?
- 18.75
- 50
- 100
- 150
100
Velocity refers to the ratio of change in _______ to the amount of ______.
Displacement; time
Speed is the magnitude of _______ without the ________.
Velocity; Direction
If an object accelerates, there is a change in its ____________.
Direction or speed or both
An object moves at a constant speed along a curved path. At the point where the path curves most sharply, the object has its _____________.
Highest acceleration
The displayed graph shows that after 2 seconds the _______ of the object is _______.
Acceleration; zero
The force of gravity on an object is called:
weight
A moving object has 3 forces on it. The combined effect of all three forces is zero. The moving object will _____ speed and will _________ direction.
Not change; Not change
Measuring deformation is necessary in order to measure
- acceleration
- displacement
- force
- mass
Acceleration
The instrument that compares the mass of an object to a known mass is called a
Balance
You can calculate the combined effect of several forces by first separating each force into its
- horizontal and vertical parts
- left and right parts
- magnitude and direction
- positive and negative parts
Horizontal and vertical parts
A temperature at which some physical event occurs is called a ______ temperature.
- Critical
- Crucial
- Key
- Physical
Critical
If a metal is heated to higher and higher temperatures, it first glows _____, then ______, then ______.
Red, orange, yellow
What is the freezing temperature of water?
0* C
The temperature at which molecular motion stops is called:
Absolute zero
Which device measures temperature most quickly?
- Bourdon gauge
- Mercury thermometer
- Optical pyrometer
- Thermocouple
Optical Pyrometer
A fluid is a:
Liquid or a Gas
If a solid has a density greater than that of a liquid into which it is placed, the solid will
Sink in the liquid
The flow rate of a moving fluid is a measure of the ________ of the fluid that moves past a given point during a given time.
Volume
When you read a psychrometer, the dew point is ________ temperature(s).
- the dry-bulb
- Between the dry-bulb and web-bulb
- The wet-bulb
- Lower than the wet-bulb
Lower than the wet-bulb
An aneroid barometer contains:
- a perfect vacuum
- mercury
- no air
- no liquid
No liquid
