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DC Circuits Webxam Refresh

Total questions: 57

Worksheet time: 1hrs 3mins

Name
Class
Date
1.
What indicates the number of circuits controlled by a switch?
a)
Path
b)
Voltage
c)
Poles
d)
Current
2.
What happens if any component is removed in a series circuit?
a)
Voltage decreases
b)
Current increases
c)
Electrical current can no longer flow
d)
Energy is conserved
3.
How are components connected in a parallel circuit?
a)
Along a single path
b)
Along multiple paths
c)
In series only
d)
With no wires
4.
What does a voltmeter measure?
a)
Current
b)
Resistance
c)
Voltage
d)
Power
5.
Why is resistance measured in ohms?
a)
To calculate power
b)
To determine current direction
c)
To measure conductivity
d)
To represent opposition to current flow
6.
According to Ohm's Law, what can be calculated when two parameters are known?
a)
Voltage only
b)
Current only
c)
Resistance only
d)
Any of the parameters
7.
When does a short circuit occur?
a)
When resistance is high
b)
When resistance is low
c)
When no components are connected
d)
When power source is off
8.
What happens in an open circuit?
a)
No current flows
b)
Resistance decreases
c)
Voltage increases
d)
Components heat up
9.
What is continuity in an electrical circuit?
a)
No resistance
b)
Resistance of 0 ohms
c)
Ability for current flow
d)
Disruption of power
10.
What is electrical power measured in?
a)
Amperes
b)
Joules
c)
Volts
d)
Watts
11.
How do resistors affect current flow?
a)
Increase it
b)
Control it
c)
Stop it
d)
Measure it
12.
What is the equivalent resistance in a series circuit?
a)
Sum of combined loads
b)
Equal to the load resistance
c)
Always 0
d)
Not calculable
13.
What does Kirchhoff's Voltage Law state?
a)
Voltage equals resistance
b)
Voltage in a loop adds up to zero
c)
Current flows from high to low potential
d)
Voltmeter measures it
14.
What is a voltage divider used for?
a)
Increase voltage
b)
Measure resistance
c)
Split incoming voltage
d)
Connect circuits
15.
What does Kirchhoff's Current Law state?
a)
Resistance equals current
b)
Current in a loop adds up to zero
c)
Voltage affects current flow
d)
High current is dangerous
16.
When does a short circuit occur?
a)
Raising resistance
b)
Lowering voltage
c)
Adding more loads
d)
Unintended low-resistance path
17.
What does a capacitor measure?
a)
Resistance
b)
Voltage
c)
Current
d)
Capacitance
18.
How can magnetism be created in a material?
a)
By cooling it down
b)
Making electrical current flow through it
c)
Adding more resistance
d)
Using it as an insulator
19.
What happens when a DC motor is connected to a power source?
a)
Voltage decreases
b)
Current reverses
c)
Brushes create resistance
d)
Electric current flows through
20.
How does a DC motor operate?
a)
By generating heat
b)
By producing light
c)
By creating a magnetic field interaction
d)
By increasing electrical resistance
21.

A resistor's first three colour bands are brown, black, and red. What is its value? include unit on answer

(a)  

22.

Which digit does the color yellow denote on a resistor color band?

a)

3

b)

2

c)

4

d)

7

23.

A 47 Kohm resistor would have which colours on its first three bands?

a)

yellow, violet, white

b)

red, white, blue

c)

yellow, violet, orange

d)

orange, yellow, violet

24.

A resistor's first three color bands are red, yellow and black. What is its value?

a)

420000 ohms

b)

240 ohms

c)

24 ohms

d)

32 ohms

25.

A resistor's first three color bands are brown, green and red. What is its value? Include unit on answer

(a)  

26.

What government agency requires employers to provide a safe work environment?

a)

Department of Housing and Urban Development

b)

Department of Health

c)

Bureau of Labor Statistics

d)

Occupational Safety and Health Administration

27.

When carrying a heavy load, do not ______ your body; rather, make adjustments in position by shifting your feet. (1 Point)

a)

turn or twist

b)

bend

c)

straighten

d)

None of the above

28.

The purpose of OSHA is to

a)

fine employers who are unsafe

b)

empower employees who are being underpaid

c)

ensure safe and healthful working conditions

d)

All of the above

29.

What rights do workers have regarding safety and health in the workplace according to OSHA?

a)

The right to unlimited sick leave

b)

The right to a safe and healthy workplace, access to injury information, and the right to report hazards.

c)

the right to choose their working hours

d)

The right to refuse to work without compensation

30.

Different types of burning materials require specific types of fire extinguishers.

a)

True

b)

False

31.

What are the three elements required for a fire to exist?

a)

Oxygen, heat, and fuel

b)

Water, heat, and fuel

c)

Carbon dioxide, heat, and fuel

d)

Nitrogen, heat, and fuel

32.

Which type of fire extinguisher should be used for flammable liquids?

a)

Class A

b)

Class B

c)

Class C

d)

Class D

33.

What type of fire extinguisher is designed for oil fires and deep fryers?

a)

Class A

b)

Class B

c)

Class C

d)

Class K

34.

What is the first step in using a fire extinguisher?

a)

Squeeze the trigger

b)

Aim the nozzle

c)

Pull the pin

d)

Sweep at the base of the flames

35.

Which type of fire extinguisher is designed for combustible metals?

a)

Class A

b)

Class B

c)

Class C

d)

Class D

36.

What is the most common type of fire extinguisher?

a)

Class A

b)

Class B

c)

Class C

d)

Class ABC

37.

True or False

Prescription eye glasses replace safety glasses

a)

True

b)

False

38.

What does LOTO stand for?

a)

Last One Tag Out

b)

Lock Out Time Out

c)

Lock Out Tag Out

d)

Look Out Trip Over

39.

You should attempt to start equipment that has been locked out or tagged out.

a)

Always

b)

Sometimes

c)

If you feel like it

d)

Never

40.

Ensure that the equipment is disconnected from energy sources by...

a)

testing to make certain the equipment will not operate

b)

sticking your hand in the machine and pressing on to test

c)

beginning maintenance on the machine

d)

All of the above

41.

Energized means

a)

Having lots of coffee

b)

Leaving work at noon

c)

Containing residual or stored energy

d)

Connected to an energy source

42.
When wearing head protection you should...
a)
A. Inspect the helmet for Safety stickers.
b)
B.  only wear it to the parties.  The chicks dig it.
c)
C.  Inspect the helmet for cracks and holes. Ensure proper snug fit with the inner cradle.
d)
D. Both A and B
43.
Lock-out-Tag-out is the process of...
a)
A. putting a password on your phone or laptop to keep them haters out!
b)
B. Putting a mechanism or lock on a piece of equipment to prevent operation
c)
C. Annotating on a tag that work is being performed and not to operate the equipment due to potiential great bodily harm
d)
D. Both B and C
44.
The acronym (SDS) stands for...
a)
Safety Data Sheet
b)
Secure Damaged Supplies
c)
Salvaged, Damaged, Stolen
d)
Standard Delivery Shipping
45.

What is isometric sketching?

a)

A process of creating a 2D sketch of an object from multiple perspectives.

b)

A method of creating a 2D representation of an object on a 3D surface.

c)

Method of creating a 3D representation of an object on a 2D surface.

d)

A technique used to create 2D drawings of 3D objects.

46.

Which component is used to store electrical energy in a circuit?

a)

Diode

b)

Inductor

c)

Capacitor

d)

Resistor

47.

What is the primary purpose of grounding in electrical systems?

a)

To provide a path for electrical faults

b)

To enhance circuit resistance

c)

To increase current flow

d)

To reduce voltage

48.
What is the total resistance (RT) across this circuit?
a)
3 kΩ
b)
10 kΩ
c)
13 kΩ
d)

18 kΩ

49.

This is the symbol for

a)

Open switch

b)

Closed switch

c)

Bulb

d)

Diode

50.

This is the symbol for

a)

Open switch

b)

Closed switch

c)

Bulb

d)

Diode

51.

This is the symbol for

a)

Open switch

b)

Closed switch

c)

Bulb

d)

Diode

52.

What is this?

a)

Resistor

b)

Variable resistor

c)

Thermistor

d)

Fuse

53.

What does this component measure?

a)

Potential difference

b)

Current

c)

Resistance

d)

Voltage

54.

This is the symbol for a...

a)

Motor

b)

Ammeter

c)

Bulb

d)

Voltmeter

55.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
56.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
57.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts

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