ELE 146 EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) A GRADE
. 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
ANSWERS (VERIFIED ANSWERS) A GRADE
. 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
