Test your technical skills in electrical engineering using our 264 quiz questions and answers on electrical drawings and symbols.
Quiz on Electrical Drawings and Symbols
The sample 25 questions are listed below.
Question 1:
There are two standard fuse symbols.
The “lazy S” symbol is used as the symbol for a __ fuse.
The rectangular symbol is used as the symbol for a __ fuse.
A) power; power
B) none of the answers
C) control; power
D) control; control
Question 2:
The acronym used to identify the type of voltage solenoid or meter is normally written within the circle between the wire terminals:
WH in the circle indicates a(n) _____________.
A) Watt Hour meter
B) Volt Hour meter
C) Watt Minute meter
D) Volt Minute meter
Question 3:
When the many different symbols are drawn into the ladder diagram to indicate the relay-logic scheme, the switch is drawn open to show the light, motor, control-relay solenoid, or whatever is being controlled, as de-energized or ____________.
A) at-rest
B) at-best
C) after-rest
D) traveler’s rest
Question 4:
When a pushbutton switch is configured as a ____________ type switch, the switch symbol in the schematic or wiring diagram relates two separate PB switches.
These switches are mechanically linked over a fulcrum, or the switching-contact symbols can be ganged on one switch operator and noted on the schematic as a latch switch.
When a selector switch is used as a ____________ type switch, it is normally noted on the ladder diagram as spring-return.
A) momentary; maintain
B) momentary; momentary
C) maintain; momentary
D) maintain; maintain
Question 5:
When the typical pushbutton switch, mounted through the front cover of the control panel with the exposed energized contact block terminals contained inside the control panel: the operator side of the panel is referred to as a ____________.
A) none of the answers
B) deadback
C) deadfront
D) deadside
Question 6:
The _____________ symbol in a ladder diagram indicates some type of annunciator.
A) circle
B) square box
C) none of the answers
D) rectangle box
Question 7:
A ______________ diagram is a drawing similar to a pictorial drawing, except the components of the circuit are represented by rectangles or circles.
A ____________ diagram shows the connection of all components in a piece of equipment from one component to another and as accurately as possible, including the Actual location or physical layout of the parts.
A) wiring; pictures
B) pictures; pictures
C) wiring; schematic
D) wiring; wiring
Question 8:
The mushroom-head or palm-head pushbutton operator is extended past the end of the locking collar, such that the closing of the mushroom head is ___________ by the collar.
A) either not affected or affected
B) affected
C) not affected
D) neither not affected nor affected
Question 9:
In a switch or relay logic ladder diagram:
The acronym _______ indicates the normally-open at-rest status of the control contacts.
The acronym _______ indicates the normally-closed at-rest status of the control contacts.
The acronym _______ indicates the normally-open held-closed at-rest status of the control contacts.
The acronym _______ indicates the normally-closed held-open at-rest status of the control contacts.
A) NO; NC; NO-HC; NC-HO
B) NC; NO; NO-HC; NC-HO
C) NO; NC; NC-HO; NO-HC
D) NC; NC-HO; NO; NO-HC
Question 10:
When a control switch contains one set of NO contacts and one set of NC contacts, and the NC contacts are opened before the NO contacts are closed, this is referred to as a _____________ switching configuration.
A) none of the answers
B) break-before-make
C) make-before-break
Question 11:
_____________ lines are used to indicate the circuit conductors which interconnect the control devices in switch/relay-logic.
A) All of the answers
B) Curved
C) Straight
D) Circular
Question 12:
The zigzag line on the load side of the latch-type switch symbol (an arc drawn between the two straight lines) indicates a ____________.
A) thermal circuit breaker
B) thermal/magnetic circuit breaker
C) circuit interrupter
D) magnetic circuit breaker
Question 13:
A special type of selector or rotary switch in which the contacts held closed by a selected operator position is opened by the moving (turning) of the operator only after the second set of held-open contacts have been closed in transient to the next selected operator position.
This is referred to as a _______________ switching configuration.
A) break-before-make
B) make-before-break
C) none of the answers
Question 14:
Control-circuit switches are of two principal types: Either ________ or _______.
A) Load or Toggle
B) Toggle or pushbutton
C) selector or pushbutton
D) Float Or Limit
Question 15:
Addressed by the acronym DPDT, ______________ indicates two single-pole double-throw switches are ganged on a common switch operator.
A) double-throw, double-pole
B) double-pole, double-throw
C) double-power, double-throw
D) none of the answers
Question 16:
___________ switches are normally drawn as one set of NO switching contacts.
A) Toggle
B) Float
C) Selector
D) Limit
Question 17:
A short straight line drawn over two small open circles indicates some type of __________
A) control switch
B) pushbutton switch
C) Toggle switch
D) Limit switch
Question 18:
___________ switches may be drawn as one set of switching contacts that are either NO or NC.
A) Toggle
B) Pushbutton
C) Load
D) Limit
Question 19:
The basic _________ circuit can be represented with a box drawing of a power source, connecting lines as wires, and another box drawing of a connected load.
A) none of the answers
B) electrical
C) ladder
D) relay
Question 20:
When drawing a 2-position selector switch, the arrowhead should point to the _______ selected position.
A) neither right nor left
B) right
C) left
D) none of the answers
Question 21:
A circle is normally used to indicate a wire connection:
A(n) __ is normally used to indicate a splice with some type of wire fastener.
A(n) __ is normally used to indicate a screw-terminal connection.
A) open circle; solid dot
B) solid dot; open circle
C) solid dot; solid dot
D) open circle; open circle
Question 22:
The double shepherd hooks on the load side of the latch-type switch symbol (an arc drawn between two straight lines) indicate a ________.
A) thermal/magnetic circuit breaker
B) magnetic circuit breaker
C) circuit interrupter
D) thermal circuit breaker
Question 23:
When either selector or pushbutton switches are drawn with more than one set of contacts interconnected with mechanical linkage to activate simultaneously with the movement of a single operator, it is referred to as a __________ switch.
A) toggle
B) shunt
C) stack
D) float
Question 24:
To communicate between control and sensing equipment located on a rotating platform and stationary control and sensing equipment, a brush and slip ring assembly is required.
The triangular arrowhead in the symbol represents the _________.
The open circle represents the turning_________.
A) brush; slip ring
B) slip ring; brush
C) slip ring; slip ring
D) brush; brush
Question 25:
The __________ Push/Pull pushbutton switch is a special type of switch often used in safety circuits where immediate shutdown of the machine or process is required with easy access to the switch.
A) palm
B) mushroom head
C) straight operator
D) Either palm or mushroom head
Click on the below button to launch the Quiz. Each question carries 1 mark. You have to score 50% of the marks to pass the test.
All 264 questions and answers are available in the Quiz.
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This work was created by Marco Gotshaw and is licensed under a Creative Commons Attribution 4.0 International License.
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