WorksheetsNPA 1130- unit 09
Total questions: 60
Worksheet time: 3600secs
This type of diagram shows a picture representation of the various components in a system and how they are connected.
pictorial diagram
schematic diagram
wiring diagram
isometric diagram
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.
pictorial diagram
schematic diagram
wiring diagram
isometric diagram
_____________ are useful when trying to explain a system using general descriptions instead of pictures or symbols.
pictorial diagram
block diagrams
wiring diagram
isometric diagram
______________ are very similar to Block diagrams, but instead of blocks, symbols are used to identify the major components of the system.
pictorial diagram
block diagrams
single line diagrams
isometric diagram
______________ use symbols to represent the different components in a system.
schematic
block diagrams
single line diagrams
isometric diagram
______________ use symbols to represent the different components in a system.
schematic diagrams
block diagrams
single line diagrams
isometric diagram
________________ shows even more detail, such as each individual contact number within each specific component
schematic diagrams
block diagrams
Elementary and wiring diagrams
isometric diagram
A _______________ explains complex digital systems in a way that is easy to read and understand
schematic diagrams
block diagrams
Elementary and wiring diagrams
logic diagram
_____________________ diagrams are important for the physical engineering and construction of electrical facilities.
Engineering and construction
block
Elementary and wiring
logic
What are the 2 common schematic diagram?
ladder diagram
wiring diagram
isometric
logic
Wiring diagrams are NOT often used when installing and troubleshooting equipment.
TRUE
FALSE
The best method for reading a ladder diagram is to start at the UPPER RIGHT of the diagram.
TRUE
FALSE
_______________ is represented by 2 vertical lines in the ladder diagram.
power supply rails
input
output
conductor
If the supply is DC, the left side of the rail is POSITIVE and the right side is NEGATIVE.
TRUE
FALSE
In ladder diagram, _____________ devices are used to perform logic functions that control the output devices.
output
power
input
line
In ladder diagram, _____________ devices cause the machine to perform its operation.
output
power
input
line
_____________ are the electrical wires that connect the circuit.
conductors
terminal
panel
component
Each component in a ladder diagram should be labeled with its function and a way to identify it.
TRUE
FALSE
This logic gate is called a (an) _____________ gate.
OR
AND
NOT
NOR
This logic gate is called a (an) _____________ gate.
OR
AND
NAND
NOR
This logic gate is called a (an) _____________ gate.
OR
AND
NAND
NOR
This logic gate is called a (an) _____________ gate.
OR
AND
NAND
NOR
This logic gate is called a (an) _____________ gate.
NOT
AND
NAND
NOR
This logic gate is called a (an) _____________ gate.
NOT
AND
XOR
NOR
This logic gate is called a (an) _____________ gate.
NOT
AND
XOR
XNOR
Electrical panels protect workers from accidental contact with electrical components.
TRUE
FALSE
Electrical panels protect components against harmful atmospheric and environmental conditions.
TRUE
FALSE
Two commonly used standards for degree of protection for electrical panels.
IEC
NEMA
MENA
EIC
According to NEMA, a HAZARDOUS location is where an ________________________ might occur.
rain
explosion
chemical
dust
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)_________________.
(1) person (2) explosion
(1) explosion (2) water
(1) water (2) person
(1) person (2) water
The IEC enclosure does not include protection against mechanical damage, explosions, condensation or corrosive vapors.
TRUE
FALSE
The IEC enclosure does not include protection against mechanical damage, explosions, condensation or corrosive vapors.
TRUE
FALSE
To help workers to identify a particular wire, panel builder attach _________ to each wire.
Label
Electrical Tape
Camera
IP Protection
The technician must ensure that wire numbers should match to the numbers on the print.
TRUE
FALSE
In numbering ladder diagram, all devices that are connected to the LEFT use wire number _____________.
1
3
2
4
In numbering ladder diagram, all devices that are connected to the RIGHT use wire number _____________.
1
3
2
4
Wire number change after passing each control device except for _______________ device.
circuit protection
contactor
wire
panel
Wire number change after passing each control device except for circuit protection device.
TRUE
FALSE
Wires from internal panel components connect to the terminal block facing inside the panel
TRUE
FALSE
Wires are not allowed to cross the terminal block
TRUE
FALSE
No more than 2 wire connections are allowed per terminal
TRUE
FALSE
________________ provide a convenient location for numbering the wires in a panel according to the print.
terminal block
blockade
terminal bar
cable
TERMINAL BLOCKS provide a convenient location for numbering the wires in a panel according to the print.
TRUE
FALSE
Terminal blocks are commonly installed in ______________.
plastic bracket
copper wire
DIN Rails
wood
TERMINAL BLOCKS are commonly installed in DIN RAIL.
TRUE
FALSE
From the picture shown, the circuit breaker is mounted in DIN RAIL.
TRUE
FALSE
A control panel contains devices such as motor starters, control relays, timers and control transformers
TRUE
FALSE
What do you call this device?
circuit breaker
overload relay
magnetic contactor
cable
What do you call this device?
circuit breaker
overload relay
magnetic contactor
cable
Start button has ___________ contact.
Normally Close (NC)
Normally Open (NO)
Stop button has ___________ contact.
Normally Close (NC)
Normally Open (NO)
The color of a STOP push button is ____________.
RED
YELLOW
BLUE
GREEN
The terminal number of magnetic contactor coil is _________.
A1 and A2
A2 and A3
A3 and A4
A4 and A5
The main contact terminal number of magnetic contactor in the SUPPLY side is _______________.
L1, L2 and L3.
T1, T2 and T3
X1, X2 and X3
Y1, Y2 and Y3
The main contact terminal number of magnetic contactor in the LOAD side is _______________.
L1, L2 and L3.
T1, T2 and T3
X1, X2 and X3
Y1, Y2 and Y3
The NO auxiliary contact terminal number of magnetic contactor is ______________.
13 and 14
14 and 15
21 and 22
23 and 24
The NC auxiliary contact terminal number of magnetic contactor is ______________.
13 and 14
14 and 15
21 and 22
23 and 24
The NC terminal number of overload relay is
95 and 96
97 and 98
90 and 91
92 and 93
The NO terminal number of overload relay is
95 and 96
97 and 98
90 and 91
92 and 93
The pushbutton return to its original position when released.
TRUE
FALSE
