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Mechanical Concepts Quiz

Total questions: 37

Worksheet time: 19mins

Name
Class
Date
1.

A positive charge is an electrical charge produced when there are more electrons than protons in an atom.

a)

True

b)

False

2.

An insulator is a material that has a very high electrical resistance and resists the flow of electrons.

a)

True

b)

False

3.

AC voltage is used in only portable equipment, such as automobiles, golf carts, flashlights, and cameras.

a)

True

b)

False

4.

Power (P) is equal to voltage (E) times current (I).

a)

True

b)

False

5.

Flux is most dense at the middle of a magnet.

a)

True

b)

False

6.

DC can be generated using electromagnetic induction.

a)

True

b)

False

7.

Never touch any part of a victim's body if the victim is in contact with a live circuit.

a)

True

b)

False

8.

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.

a)

True

b)

False

9.

Three-phase AC voltage is a combination of three alternating voltage waveforms, can vary in degrees apart.

a)

True

b)

False

c)

They're 120 degrees apart

d)

They're 180 degrees apart

10.

This is a Series Circuit.

a)

True

b)

False

c)

It's a Series-Parallel circuit

d)

It's a Parallel Curcuit

11.

A(n) ___ is an atomic particle with a negative charge.

a)

Proton

b)

Neutron

c)

Electron

d)

Positron

12.

___ is the amount of electrical pressure in a circuit.

a)

Resistance

b)

Voltage

c)

Power

d)

Current

13.

An AC sine wave reaches its peak positive value at ___°.

a)

90

b)

180

c)

270

d)

360

14.

A(n) ___ is the movable part of a generator or motor.

a)

commutator

b)

pigtail

c)

armature

d)

brush

15.

A(n) ___ shell is the outermost shell of an atom.

a)

Valence

b)

Electron

c)

Atomic

d)

Particle

16.

120 volts, 20 amps, how many ohms?

a)

6 ohms

b)

8 ohms

c)

4 ohms

d)

10 ohms

17.

120v, 20ohms; How many Watts?

a)

2400 Watts

b)

2000 Watts

c)

1800 Watts

d)

1600 Watts

18.

T or F - It's ok to remove guards for equipment if they get in the way.

a)

True

b)

False

19.

T or F - If a power cord has a wire exposed but not severed, you can wrap it with electrical tape to protect it?

a)

True

b)

False

20.

T or F - A protractor is used to measure printed angles.

a)

True

b)

False

21.

T or F - A ray is a straight line intersecting a vertex of an angle.

a)

True

b)

False

22.

A compass is a measuring tool marked with even increment lines used for measuring length.

a)

True

b)

False

23.

Bernoulli’s theory states that as pressure decreases, velocity does what?

a)

Stays the same

b)

Explodes

c)

Increases

d)

Decreases

24.

In a 4-stroke engine, a crankshaft and camshaft each turns twice per engine cycle.

a)

True

b)

False

25.

The strokes of a 4 cycle engine are intake, ______, power, and exhaust.

a)

Compression

b)

Ignition

c)

Cooling

d)

Lubrication

26.

The top ring of a piston is the Compression Ring.

a)

True

b)

False

27.

Area, force, and pressure are the basis of all hydraulic systems.

a)

True

b)

False

28.

The pressure of the fluid at any level in a vessel is the same regardless of the shape of the vessel.

a)

True

b)

False

29.

Fluids that are thin and flow easily have a high viscosity.

a)

True

b)

False

30.

The velocity of a fluid decreases as the cross-sectional area of a pipe increases.

a)

True

b)

False

31.

Head is expressed in feet.

a)

True

b)

False

32.

Static energy is the energy of motion.

a)

True

b)

False

33.

Total energy is a measure of a fluid’s ability to do work.

a)

True

b)

False

34.

One horsepower is the amount of energy required to lift ______ lb 1' in 1 min.

a)

33,000

b)

330

c)

300

d)

3,300

35.

A typical positive-displacement pump in good condition has a volumetric efficiency of approximately ___% because some slippage is required for pump lubrication.

a)

75

b)

85

c)

80

d)

95

36.

___ is the height at which atmospheric pressure forces a fluid above the elevation of its supply source.

a)

Increase

b)

Elevation

c)

Lift

d)

Static Head

37.

T or F - Volume is the two-dimensional size of an object measured in cubic units.

a)

True

b)

False