1|Page
NM LP-5 INSTALLATION SERVICE AND REPAIR Exam 2026-
2027 BANK QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXAM QUESTIONS WILL COME FROM HERE
(100% Latest Already Graded A+
1. Before beginning any installation of an NM LP-5 unit, the first step
should be to:
a) Connect power temporarily
b) Read the manufacturer’s installation manual
c) Remove all panels for inspection
d) Apply lubricant to moving parts
Answer: b
Explanation: Always consult the manufacturer’s installation manual first
to understand specific requirements, torque values, clearance, and
safety warnings. Skipping this step can lead to improper installation,
voided warranty, or hazardous conditions .
2. What is the purpose of the lockout/tagout procedure when servicing
an NM LP-5?
a) To speed up the repair process
b) To ensure energy sources are isolated and cannot be re-energized
accidentally
,2|Page
c) To lock the unit in an operational state
d) To record service times
Answer: b
Explanation: Lockout/tagout isolates electrical, mechanical, or
pneumatic energy sources, preventing unexpected startup during
service, which is critical for technician safety .
3. The NM LP-5's primary power supply should be:
a) 120V AC, ungrounded
b) 24V DC only
c) As specified on the unit's nameplate
d) Variable depending on load
Answer: c
Explanation: Always use the voltage, phase, and frequency listed on the
nameplate to avoid damage or fire. Nameplate data is legally required
and specific to the unit .
4. During installation, grounding the NM LP-5 chassis is essential to:
a) Improve energy efficiency
b) Prevent electric shock and provide a fault current path
c) Increase motor torque
d) Reduce noise only
Answer: b
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Explanation: Grounding ensures that in a fault condition, dangerous
voltages are shunted to earth, tripping overcurrent protection and
protecting personnel .
5. Which tool is most appropriate for checking continuity of a fuse in an
NM LP-5 control circuit?
a) Clamp meter
b) Multimeter (ohms/continuity setting)
c) Megger
d) Oscilloscope
Answer: b
Explanation: A multimeter on continuity or resistance range can verify if
a fuse is intact (near 0 ohms) or blown (infinite resistance) .
6. The NM LP-5 unit fails to start. The first electrical check should be:
a) Replace the main circuit board
b) Measure voltage at the incoming power terminals
c) Test all capacitors with a capacitance meter
d) Bypass all safety interlocks
Answer: b
Explanation: Always verify incoming power first. If power is missing, no
further troubleshooting is valid. This follows a logical top-down
approach .
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7. A buzzing sound from the contactor in an NM LP-5 likely indicates:
a) Normal operation
b) Low coil voltage or dirty magnetic poles
c) Overloaded motor
d) Incorrect belt tension
Answer: b
Explanation: Low voltage causes the contactor to chatter; dirty poles
also cause buzzing due to incomplete magnetic closure, which can burn
out the coil .
8. When replacing a faulty run capacitor in the NM LP-5, you must:
a) Use a capacitor with a lower voltage rating
b) Use any capacitor with the same physical size
c) Match the microfarad rating and voltage rating
d) Install a start capacitor instead
Answer: c
Explanation: Capacitors are selected by capacitance (μF) and voltage
rating. Using an incorrect value will affect motor performance or
destroy the capacitor .
9. The NM LP-5 control board LED flashes four times repeatedly. This
likely means:
a) Normal standby
NM LP-5 INSTALLATION SERVICE AND REPAIR Exam 2026-
2027 BANK QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXAM QUESTIONS WILL COME FROM HERE
(100% Latest Already Graded A+
1. Before beginning any installation of an NM LP-5 unit, the first step
should be to:
a) Connect power temporarily
b) Read the manufacturer’s installation manual
c) Remove all panels for inspection
d) Apply lubricant to moving parts
Answer: b
Explanation: Always consult the manufacturer’s installation manual first
to understand specific requirements, torque values, clearance, and
safety warnings. Skipping this step can lead to improper installation,
voided warranty, or hazardous conditions .
2. What is the purpose of the lockout/tagout procedure when servicing
an NM LP-5?
a) To speed up the repair process
b) To ensure energy sources are isolated and cannot be re-energized
accidentally
,2|Page
c) To lock the unit in an operational state
d) To record service times
Answer: b
Explanation: Lockout/tagout isolates electrical, mechanical, or
pneumatic energy sources, preventing unexpected startup during
service, which is critical for technician safety .
3. The NM LP-5's primary power supply should be:
a) 120V AC, ungrounded
b) 24V DC only
c) As specified on the unit's nameplate
d) Variable depending on load
Answer: c
Explanation: Always use the voltage, phase, and frequency listed on the
nameplate to avoid damage or fire. Nameplate data is legally required
and specific to the unit .
4. During installation, grounding the NM LP-5 chassis is essential to:
a) Improve energy efficiency
b) Prevent electric shock and provide a fault current path
c) Increase motor torque
d) Reduce noise only
Answer: b
,3|Page
Explanation: Grounding ensures that in a fault condition, dangerous
voltages are shunted to earth, tripping overcurrent protection and
protecting personnel .
5. Which tool is most appropriate for checking continuity of a fuse in an
NM LP-5 control circuit?
a) Clamp meter
b) Multimeter (ohms/continuity setting)
c) Megger
d) Oscilloscope
Answer: b
Explanation: A multimeter on continuity or resistance range can verify if
a fuse is intact (near 0 ohms) or blown (infinite resistance) .
6. The NM LP-5 unit fails to start. The first electrical check should be:
a) Replace the main circuit board
b) Measure voltage at the incoming power terminals
c) Test all capacitors with a capacitance meter
d) Bypass all safety interlocks
Answer: b
Explanation: Always verify incoming power first. If power is missing, no
further troubleshooting is valid. This follows a logical top-down
approach .
, 4|Page
7. A buzzing sound from the contactor in an NM LP-5 likely indicates:
a) Normal operation
b) Low coil voltage or dirty magnetic poles
c) Overloaded motor
d) Incorrect belt tension
Answer: b
Explanation: Low voltage causes the contactor to chatter; dirty poles
also cause buzzing due to incomplete magnetic closure, which can burn
out the coil .
8. When replacing a faulty run capacitor in the NM LP-5, you must:
a) Use a capacitor with a lower voltage rating
b) Use any capacitor with the same physical size
c) Match the microfarad rating and voltage rating
d) Install a start capacitor instead
Answer: c
Explanation: Capacitors are selected by capacitance (μF) and voltage
rating. Using an incorrect value will affect motor performance or
destroy the capacitor .
9. The NM LP-5 control board LED flashes four times repeatedly. This
likely means:
a) Normal standby
