ELE 146 Exam QUESTIONS WITH CORRECT
ANSWERS SOLVED
. Current is measured in amperes (A), but what letter is used to represent current? - CORRECT
ANSWER✅✅I
. If a transformer has a turns ratio of 1:4, what is the transformer's power ratio? - CORRECT
ANSWER✅✅the power ratio of the transformer would be 1:1
. What are the two types of current? - CORRECT ANSWER✅✅Alternating and direct
. What device allows current to flow in only one direction? - CORRECT ANSWER✅✅Diode
. What is the IEC number used to describe the enclosure type that can be used to protect internal
electrical components against prolonged submersion at a limited depth, such as occasional flooding of
an area? - CORRECT ANSWER✅✅IP38
. What type of limit switch actuator allows detection of a moving object from any direction except head
on? - CORRECT ANSWER✅✅push roller
. Which type of diagram shows the logic of an electrical circuit drawn with vertical power lines and
circuit components drawn on horizontal lines between the power lines? - CORRECT ANSWER✅✅line
diagram
1. If a flow switch is used to sound an alarm when there is no flow, are NO or NC contacts used to
control the alarm? - CORRECT ANSWER✅✅NO contacts
A __________ is often used to allow an operator or technician to change a machine from the automatic
mode to the manual mode. - CORRECT ANSWER✅✅Selector switch
, A disconnect is a switch that will: - CORRECT ANSWER✅✅Manually remove power from a circuit or
apply power to a circuit
A form letter is used to simplify relay contacts. What form letter would identify a relay with a SPST-NC
contact type? - CORRECT ANSWER✅✅B
A Hand-Off-Automatic (H-O-A) circuit requires a selector switch with __________ positions. - CORRECT
ANSWER✅✅3
A selector switch with a legend plate labeled SLOW/FAST is an example of what type of selector switch?
- CORRECT ANSWER✅✅Two Position Selector Switch
A selector switch with a legend plate labeled SLOW/OFF/FAST is an example of what type of selector
switch? - CORRECT ANSWER✅✅Three Selector Switch
Are reed relays usually used to switch loads in the 0.1 A to 10 A range? - CORRECT ANSWER✅✅Yes
Are relays usually used to control higher current loads, such as a 20 A electric motor? - CORRECT
ANSWER✅✅No
Can a relay with multiple contacts use the different contacts to control different loads, each with a
different voltage level, as long as each circuit is isolated from the other circuits? - CORRECT
ANSWER✅✅Yes
Can one pushbutton operate both NO and NC contacts? - CORRECT ANSWER✅✅A pushbutton with a
contact block can operate both NO and NC contacts
Can one relay coil control several different relay contacts? - CORRECT ANSWER✅✅Yes
Can reed relays be manually operated? - CORRECT ANSWER✅✅No
ANSWERS SOLVED
. Current is measured in amperes (A), but what letter is used to represent current? - CORRECT
ANSWER✅✅I
. If a transformer has a turns ratio of 1:4, what is the transformer's power ratio? - CORRECT
ANSWER✅✅the power ratio of the transformer would be 1:1
. What are the two types of current? - CORRECT ANSWER✅✅Alternating and direct
. What device allows current to flow in only one direction? - CORRECT ANSWER✅✅Diode
. What is the IEC number used to describe the enclosure type that can be used to protect internal
electrical components against prolonged submersion at a limited depth, such as occasional flooding of
an area? - CORRECT ANSWER✅✅IP38
. What type of limit switch actuator allows detection of a moving object from any direction except head
on? - CORRECT ANSWER✅✅push roller
. Which type of diagram shows the logic of an electrical circuit drawn with vertical power lines and
circuit components drawn on horizontal lines between the power lines? - CORRECT ANSWER✅✅line
diagram
1. If a flow switch is used to sound an alarm when there is no flow, are NO or NC contacts used to
control the alarm? - CORRECT ANSWER✅✅NO contacts
A __________ is often used to allow an operator or technician to change a machine from the automatic
mode to the manual mode. - CORRECT ANSWER✅✅Selector switch
, A disconnect is a switch that will: - CORRECT ANSWER✅✅Manually remove power from a circuit or
apply power to a circuit
A form letter is used to simplify relay contacts. What form letter would identify a relay with a SPST-NC
contact type? - CORRECT ANSWER✅✅B
A Hand-Off-Automatic (H-O-A) circuit requires a selector switch with __________ positions. - CORRECT
ANSWER✅✅3
A selector switch with a legend plate labeled SLOW/FAST is an example of what type of selector switch?
- CORRECT ANSWER✅✅Two Position Selector Switch
A selector switch with a legend plate labeled SLOW/OFF/FAST is an example of what type of selector
switch? - CORRECT ANSWER✅✅Three Selector Switch
Are reed relays usually used to switch loads in the 0.1 A to 10 A range? - CORRECT ANSWER✅✅Yes
Are relays usually used to control higher current loads, such as a 20 A electric motor? - CORRECT
ANSWER✅✅No
Can a relay with multiple contacts use the different contacts to control different loads, each with a
different voltage level, as long as each circuit is isolated from the other circuits? - CORRECT
ANSWER✅✅Yes
Can one pushbutton operate both NO and NC contacts? - CORRECT ANSWER✅✅A pushbutton with a
contact block can operate both NO and NC contacts
Can one relay coil control several different relay contacts? - CORRECT ANSWER✅✅Yes
Can reed relays be manually operated? - CORRECT ANSWER✅✅No
