wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

ELECTRO 1 Mid-term Examination (Part 2)

Total questions: 60

Worksheet time: 53mins

Name
Class
Date
1.

What is the allowable (or below) voltage value that are reasonably safe for portable hand tools?

a)

5V

b)

55V

c)

110V

d)

240V

2.

What is the effect on the victim if he is touches a 100milli-Ampere currents?

a)

sensation that electric shock is occurring

b)

can paralyze or “freeze” muscles

c)

can cause a rapid, ineffective heartbeat

d)

may cause a person to die unless given treatment.

3.

The inner resistance of a human body is about:

a)

5Ω

b)

50Ω

c)

500Ω

d)

5000Ω

4.

Which is not a common cause of electrical accidents?

a)

contact with live conductors

b)

short circuit

c)

overloading

d)

none of the above

5.

Sample of an effect of electrical hazards.

a)

electrocution

b)

electric shock

c)

fire

d)

all of the above

6.

What instrument will you use to confirm that circuits are “dead”?

a)

Clamp meter

b)

Continuity tester

c)

Multimeter

d)

Ohmmeter

7.

An item of electrical test equipment used to determine if an electrical path can be established between two points.

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

8.

It is a part of a clamp meter that freezes the display reading. Reading is released when button is pushed a second time.

a)

hold button

b)

pointer and scale

c)

selection switch

d)

zero button

9.

What is this symbols or button (below)?

a)

COM (common terminal)

b)

Network signal

c)

Positive (output) terminal

d)

Continuity test mode.

10.

What would the continuity tester do when a complete electrical path (between two points) is detected?

a)

will display OL (low value)

b)

will have a zero value

c)

will make a beep sound

d)

will not create a buzz sound

11.

Clamp meter are primarily used for: (click that applies)

a)

Installation

b)

Maintenance

c)

Safety

d)

Service

12.

What instrument is this?

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

13.

What instrument is this?

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

14.

What instrument is this?

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

15.

What instrument is this?

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

16.

It is a part of a clamp meter that removes dc offset from dc current measurements. Also serves as dial’s shift button to select yellow functions scattered around the dial.

a)

display

b)

pointer and scale

c)

selection switch

d)

zero button

17.

Also known as a VOM (volt-ohm-milliammeter) and use a micro-ammeter with a moving pointer to display readings.

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

18.

Why would you adjust the knob in Analog Multi-meter when the input terminals are shorted (the black probe touches the red probe)?

a)

to determine the connection

b)

to set a zero ohms

c)

to test the multi-meter

d)

to create a beep sound

19.

It is a part of a DMM that show the value of the measure voltage (ac or dc), current or resistance.

a)

display

b)

pointer and scale

c)

selection switch

d)

zero button

20.

What is the reading in the Analog Multi-meter, when the selection switch is at x10, and the pointer is between 30 & 50?

a)

100

b)

300

c)

400

d)

500

21.

A test tool used to measure two or more electrical values, principally voltage (volts), current (amps) but it has the advantage of having a large internal resistance (ohms).

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

22.

If the reading in the DMM is larger than the range, the reading (in the display screen) cannot be shown.

a)

True

b)

False

23.

Clamp meter are primarily used for: (click that applies)

a)

Convenience

b)

Installation

c)

Safety

d)

Service

24.

There is a need to multiply (by the value in selection switch) for digital ohmmeter as it is the range and the conversion factor.

a)

TRUE

b)

FALSE

25.

It is a part of analog multi-meter that select to measure voltage (ac or dc), current or resistance.

a)

display

b)

pointer and scale

c)

selection switch

d)

zero button

26.

An electrical test tool that combines a basic digital multi-meter with a current sensor.

a)

Analog multi-meter

b)

Clamp meter

c)

Continuity tester

d)

Digital multi-meter

27.

Reason why clamp meters is a popular tool (when the jaws of a clamp meter do not need to touch a conductor during a measurement)

a)

Convenience

b)

Maintenance

c)

Safety

d)

Service

28.

Reason why clamp meters is a popular tool (clamp meters are preferred for measuring high levels of current).

a)

Convenience

b)

Maintenance

c)

Safety

d)

Service

29.

It is a part of analog multi-meter that have scale for different measurements.

a)

display

b)

pointer and scale

c)

selection switch

d)

zero button

30.

Express 0.000 000 04s to nanoseconds.

a)

0.4

b)

4

c)

40

d)

400

31.

A resistor has a value of 0.1M stamped on its case. How many ohms does it have?

a)

10 000

b)

100 000

c)

1 000 000

d)

10 000 000

32.

Diagram that shows in simplified form, the main interrelationship of the elements in a system.

a)

block diagram

b)

circuit diagram

c)

system diagram

d)

wiring diagram

33.

What is 0.000 007second in microseconds?

a)

0.7

b)

7

c)

70

d)

700

34.

Express 0.0025 kA in milli-Amperes.

a)

2.5

b)

25

c)

250

d)

2500

35.

A shorthand way to draw an electric circuit, represent the pictorial components in a simplified form.

a)

block diagram

b)

one-line diagram

c)

pictorial diagram

d)

schematic diagram

36.

Shows the component parts of a circuit by means of single lines and appropriate graphical symbols.

a)

block diagram

b)

one-line diagram

c)

pictorial diagram

d)

schematic diagram

37.

Diagram that shows the detailed wiring & connections between the components or items of equipment.

a)

block diagram

b)

circuit diagram

c)

system diagram

d)

wiring diagram

38.

A power plant has a capacity of delivering 500 000 watts. What is the capacity in MW?

a)

0.5

b)

5

c)

50

d)

500

39.

Find in milli-seconds the value 0.003 seconds.

a)

0.3

b)

3

c)

30

d)

300

40.

A diagram that shows the functioning of a circuit and is essential tool in troubleshooting.

a)

block diagram

b)

circuit diagram

c)

system diagram

d)

wiring diagram

41.

Find in μ-Amperes the value of 0.000 045A.

a)

4.5

b)

45

c)

450

d)

4500

42.

Diagram that shows the main features of a system and its boundaries without necessarily cause to effect.

a)

block diagram

b)

circuit diagram

c)

system diagram

d)

wiring diagram

43.

A circuit consists of a 6V battery, a switch, and a lamp. When the switch is closed, 2A flows in the circuit. What is the resistance of the lamp?

a)

b)

c)

d)

44.

The hindrance to the flow of charge

a)

AC Current

b)

DC Current

c)

Resistance

d)

Voltage

45.

Suppose you replace the lamp of 6V across it but drawing only 40mA. What is the resistance of the new lamp?

a)

100Ω

b)

150Ω

c)

200Ω

d)

250Ω

46.

A voltage of 20V is measured across a 0.2kΩ resistor. What is the current flowing through the resistor?

a)

100mA

b)

200mA

c)

300mA

d)

400mA

47.

The current that reverses direction

a)

AC Current

b)

DC Current

c)

Resistance

d)

Voltage

48.

If the resistance of the air gap in an automotive spark plug is 2500Ω, what voltage is needed to force 200mA through it?

a)

100V

b)

300V

c)

350V

d)

500V

49.

The current flows in one direction.

a)

AC Current

b)

DC Current

c)

Resistance

d)

Voltage

50.

The filament of a television tube has a resistance of 90Ω. What voltage is required to produce the tube’s rated current of 300mA?

a)

13V

b)

27V

c)

35V

d)

42V

51.

A 110V line is protected with a 25A fuse. Will the fuse “carry” a 6Ω load?

a)

yes

b)

no

c)

maybe

d)

not sure

52.

What is the resistance used by a soldering iron taking 2A at 110V?

a)

50 ohms

b)

55 ohms

c)

60 ohms

d)

65 ohms

53.

Find the voltage used by a 10kΩ resistor drawing 0.01A.

a)

100V

b)

110V

c)

1000V

d)

1100V

54.

Amount of potential energy between two points.

a)

AC Current

b)

DC Current

c)

Resistance

d)

Voltage

55.

Find the current supplied by the generator if it delivers 20A at 220V.

a)

10A

b)

11A

c)

100A

d)

110A

56.

An electric dryer requires 123.3Ω and draws 1.8A. Find it’s operating voltage?

a)

100V

b)

111V

c)

200V

d)

222V

57.

The rate at which charge is flowing.

a)

Current

b)

Resistance

c)

Resistivity

d)

Voltage

58.

Find the operating voltage of a motor that requires 30Ω and draws 8A?

a)

110V

b)

240V

c)

400V

d)

440V

59.

What is the resistance of the compressor if the voltage is 440V across a 2200mA?

a)

100Ω

b)

150Ω

c)

200Ω

d)

250Ω

60.

What is the current flowing through the 800mΩ resistor with a voltage of 240V?

a)

100A

b)

200A

c)

300A

d)

400A