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WorksheetsMechanical Concepts Quiz
Total questions: 37
Worksheet time: 19mins
A positive charge is an electrical charge produced when there are more electrons than protons in an atom.
True
False
An insulator is a material that has a very high electrical resistance and resists the flow of electrons.
True
False
AC voltage is used in only portable equipment, such as automobiles, golf carts, flashlights, and cameras.
True
False
Power (P) is equal to voltage (E) times current (I).
True
False
Flux is most dense at the middle of a magnet.
True
False
DC can be generated using electromagnetic induction.
True
False
Never touch any part of a victim's body if the victim is in contact with a live circuit.
True
False
A brush is a ring made of insulated segments that keep the armature windings in the correct polarity to interact with the main fields in a DC generator.
True
False
Three-phase AC voltage is a combination of three alternating voltage waveforms, can vary in degrees apart.
True
False
They're 120 degrees apart
They're 180 degrees apart
This is a Series Circuit.
True
False
It's a Series-Parallel circuit
It's a Parallel Curcuit
A(n) ___ is an atomic particle with a negative charge.
Proton
Neutron
Electron
Positron
___ is the amount of electrical pressure in a circuit.
Resistance
Voltage
Power
Current
An AC sine wave reaches its peak positive value at ___°.
90
180
270
360
A(n) ___ is the movable part of a generator or motor.
commutator
pigtail
armature
brush
A(n) ___ shell is the outermost shell of an atom.
Valence
Electron
Atomic
Particle
120 volts, 20 amps, how many ohms?
6 ohms
8 ohms
4 ohms
10 ohms
120v, 20ohms; How many Watts?
2400 Watts
2000 Watts
1800 Watts
1600 Watts
T or F - It's ok to remove guards for equipment if they get in the way.
True
False
T or F - If a power cord has a wire exposed but not severed, you can wrap it with electrical tape to protect it?
True
False
T or F - A protractor is used to measure printed angles.
True
False
T or F - A ray is a straight line intersecting a vertex of an angle.
True
False
A compass is a measuring tool marked with even increment lines used for measuring length.
True
False
Bernoulli’s theory states that as pressure decreases, velocity does what?
Stays the same
Explodes
Increases
Decreases
In a 4-stroke engine, a crankshaft and camshaft each turns twice per engine cycle.
True
False
The strokes of a 4 cycle engine are intake, ______, power, and exhaust.
Compression
Ignition
Cooling
Lubrication
The top ring of a piston is the Compression Ring.
True
False
Area, force, and pressure are the basis of all hydraulic systems.
True
False
The pressure of the fluid at any level in a vessel is the same regardless of the shape of the vessel.
True
False
Fluids that are thin and flow easily have a high viscosity.
True
False
The velocity of a fluid decreases as the cross-sectional area of a pipe increases.
True
False
Head is expressed in feet.
True
False
Static energy is the energy of motion.
True
False
Total energy is a measure of a fluid’s ability to do work.
True
False
One horsepower is the amount of energy required to lift ______ lb 1' in 1 min.
33,000
330
300
3,300
A typical positive-displacement pump in good condition has a volumetric efficiency of approximately ___% because some slippage is required for pump lubrication.
75
85
80
95
___ is the height at which atmospheric pressure forces a fluid above the elevation of its supply source.
Increase
Elevation
Lift
Static Head
T or F - Volume is the two-dimensional size of an object measured in cubic units.
True
False
