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NPA 1130- unit 09

Total questions: 60

Worksheet time: 3600secs

Name
Class
Date
1.

This type of diagram shows a picture representation of the various components in a system and how they are connected.

a)

pictorial diagram

b)

schematic diagram

c)

wiring diagram

d)

isometric diagram

2.

These diagrams will show a three-dimensional representation of the system or component and then display the general physical location of all other components within that system.

a)

pictorial diagram

b)

schematic diagram

c)

wiring diagram

d)

isometric diagram

3.

_____________ are useful when trying to explain a system using general descriptions instead of pictures or symbols.

a)

pictorial diagram

b)

block diagrams

c)

wiring diagram

d)

isometric diagram

4.

______________ are very similar to Block diagrams, but instead of blocks, symbols are used to identify the major components of the system.

a)

pictorial diagram

b)

block diagrams

c)

single line diagrams

d)

isometric diagram

5.

______________ use symbols to represent the different components in a system.

a)

schematic

b)

block diagrams

c)

single line diagrams

d)

isometric diagram

6.

______________ use symbols to represent the different components in a system.

a)

schematic diagrams

b)

block diagrams

c)

single line diagrams

d)

isometric diagram

7.

________________ shows even more detail, such as each individual contact number within each specific component

a)

schematic diagrams

b)

block diagrams

c)

Elementary and wiring diagrams

d)

isometric diagram

8.

A _______________ explains complex digital systems in a way that is easy to read and understand

a)

schematic diagrams

b)

block diagrams

c)

Elementary and wiring diagrams

d)

logic diagram

9.

_____________________ diagrams are important for the physical engineering and construction of electrical facilities.

a)

Engineering and construction

b)

block

c)

Elementary and wiring

d)

logic

10.

What are the 2 common schematic diagram?

a)

ladder diagram

b)

wiring diagram

c)

isometric

d)

logic

11.

Wiring diagrams are NOT often used when installing and troubleshooting equipment.

a)

TRUE

b)

FALSE

12.

The best method for reading a ladder diagram is to start at the UPPER RIGHT of the diagram.

a)

TRUE

b)

FALSE

13.

_______________ is represented by 2 vertical lines in the ladder diagram.

a)

power supply rails

b)

input

c)

output

d)

conductor

14.

If the supply is DC, the left side of the rail is POSITIVE and the right side is NEGATIVE.

a)

TRUE

b)

FALSE

15.

In ladder diagram, _____________ devices are used to perform logic functions that control the output devices.

a)

output

b)

power

c)

input

d)

line

16.

In ladder diagram, _____________ devices cause the machine to perform its operation.

a)

output

b)

power

c)

input

d)

line

17.

_____________ are the electrical wires that connect the circuit.

a)

conductors

b)

terminal

c)

panel

d)

component

18.

Each component in a ladder diagram should be labeled with its function and a way to identify it.

a)

TRUE

b)

FALSE

19.

This logic gate is called a (an) _____________ gate.

a)

OR

b)

AND

c)

NOT

d)

NOR

20.

This logic gate is called a (an) _____________ gate.

a)

OR

b)

AND

c)

NAND

d)

NOR

21.

This logic gate is called a (an) _____________ gate.

a)

OR

b)

AND

c)

NAND

d)

NOR

22.

This logic gate is called a (an) _____________ gate.

a)

OR

b)

AND

c)

NAND

d)

NOR

23.

This logic gate is called a (an) _____________ gate.

a)

NOT

b)

AND

c)

NAND

d)

NOR

24.

This logic gate is called a (an) _____________ gate.

a)

NOT

b)

AND

c)

XOR

d)

NOR

25.

This logic gate is called a (an) _____________ gate.

a)

NOT

b)

AND

c)

XOR

d)

XNOR

26.

Electrical panels protect workers from accidental contact with electrical components.

a)

TRUE

b)

FALSE

27.

Electrical panels protect components against harmful atmospheric and environmental conditions.

a)

TRUE

b)

FALSE

28.

Two commonly used standards for degree of protection for electrical panels.

a)

IEC

b)

NEMA

c)

MENA

d)

EIC

29.

According to NEMA, a HAZARDOUS location is where an ________________________ might occur.

a)

rain

b)

explosion

c)

chemical

d)

dust

30.

The first digit of IP protection describes the degree of protection for a (1)_______________ while the second digit describes the degree of protection against (2)_________________.

a)

(1) person (2) explosion

b)

(1) explosion (2) water

c)

(1) water (2) person

d)

(1) person (2) water

31.

The IEC enclosure does not include protection against mechanical damage, explosions, condensation or corrosive vapors.

a)

TRUE

b)

FALSE

32.

The IEC enclosure does not include protection against mechanical damage, explosions, condensation or corrosive vapors.

a)

TRUE

b)

FALSE

33.

To help workers to identify a particular wire, panel builder attach _________ to each wire.

a)

Label

b)

Electrical Tape

c)

Camera

d)

IP Protection

34.

The technician must ensure that wire numbers should match to the numbers on the print.

a)

TRUE

b)

FALSE

35.

In numbering ladder diagram, all devices that are connected to the LEFT use wire number _____________.

a)

1

b)

3

c)

2

d)

4

36.

In numbering ladder diagram, all devices that are connected to the RIGHT use wire number _____________.

a)

1

b)

3

c)

2

d)

4

37.

Wire number change after passing each control device except for _______________ device.

a)

circuit protection

b)

contactor

c)

wire

d)

panel

38.

Wire number change after passing each control device except for circuit protection device.

a)

TRUE

b)

FALSE

39.

Wires from internal panel components connect to the terminal block facing inside the panel

a)

TRUE

b)

FALSE

40.

Wires are not allowed to cross the terminal block

a)

TRUE

b)

FALSE

41.

No more than 2 wire connections are allowed per terminal

a)

TRUE

b)

FALSE

42.

________________ provide a convenient location for numbering the wires in a panel according to the print.

a)

terminal block

b)

blockade

c)

terminal bar

d)

cable

43.

TERMINAL BLOCKS provide a convenient location for numbering the wires in a panel according to the print.

a)

TRUE

b)

FALSE

44.

Terminal blocks are commonly installed in ______________.

a)

plastic bracket

b)

copper wire

c)

DIN Rails

d)

wood

45.

TERMINAL BLOCKS are commonly installed in DIN RAIL.

a)

TRUE

b)

FALSE

46.

From the picture shown, the circuit breaker is mounted in DIN RAIL.

a)

TRUE

b)

FALSE

47.

A control panel contains devices such as motor starters, control relays, timers and control transformers

a)

TRUE

b)

FALSE

48.

What do you call this device?

a)

circuit breaker

b)

overload relay

c)

magnetic contactor

d)

cable

49.

What do you call this device?

a)

circuit breaker

b)

overload relay

c)

magnetic contactor

d)

cable

50.

Start button has ___________ contact.

a)

Normally Close (NC)

b)

Normally Open (NO)

51.

Stop button has ___________ contact.

a)

Normally Close (NC)

b)

Normally Open (NO)

52.

The color of a STOP push button is ____________.

a)

RED

b)

YELLOW

c)

BLUE

d)

GREEN

53.

The terminal number of magnetic contactor coil is _________.

a)

A1 and A2

b)

A2 and A3

c)

A3 and A4

d)

A4 and A5

54.

The main contact terminal number of magnetic contactor in the SUPPLY side is _______________.

a)

L1, L2 and L3.

b)

T1, T2 and T3

c)

X1, X2 and X3

d)

Y1, Y2 and Y3

55.

The main contact terminal number of magnetic contactor in the LOAD side is _______________.

a)

L1, L2 and L3.

b)

T1, T2 and T3

c)

X1, X2 and X3

d)

Y1, Y2 and Y3

56.

The NO auxiliary contact terminal number of magnetic contactor is ______________.

a)

13 and 14

b)

14 and 15

c)

21 and 22

d)

23 and 24

57.

The NC auxiliary contact terminal number of magnetic contactor is ______________.

a)

13 and 14

b)

14 and 15

c)

21 and 22

d)

23 and 24

58.

The NC terminal number of overload relay is

a)

95 and 96

b)

97 and 98

c)

90 and 91

d)

92 and 93

59.

The NO terminal number of overload relay is

a)

95 and 96

b)

97 and 98

c)

90 and 91

d)

92 and 93

60.

The pushbutton return to its original position when released.

a)

TRUE

b)

FALSE