Update your understanding of MCB nameplate details with expert questions and answers perfect for exam prep and electrical studies.
MCB Nameplate Questions
Watch the below MCB video to learn more about each question with their explanation.
Question 1
What is the Rated Current of the MCB?
A. Maximum breaking capacity it can handle
B. Maximum voltage it can handle
C. Maximum current it can handle without tripping
D. Maximum frequency it can handle
Show the Answer
Maximum current it can handle without tripping
Question 2
What is the Rated Voltage of the MCB?
A. Maximum voltage it can handle
B. Maximum frequency it can handle
C. Maximum current it can handle
D. Maximum breaking capacity it can handle
Show the Answer
Maximum voltage it can handle
Question 3
What is the Breaking Capacity of the MCB?
A. Maximum operating temperature it can withstand
B. Voltage it carries in normal operation
C. Maximum fault current it can interrupt
D. Current it carries in normal operation
Show the Answer
Maximum fault current it can interrupt
Question 4
What is the Tripping Characteristic (Type B, C, D, etc.) of the MCB?
A. Indicates the current rating
B. Indicates the breaking capacity
C. Indicates the time-current characteristics
D. Indicates the voltage rating
Show the Answer
Indicates the time-current characteristics
Question 5
What is the Number of Poles in the MCB?
A. Indicates the rated current capacity
B. Indicates the tripping speed
C. Indicates the rated voltage capacity
D. Indicates the number of circuits it can protect
Show the Answer
Indicates the number of circuits it can protect
Question 6
What is the Frequency of the MCB?
A. The maximum current it can carry
B. The maximum voltage it can carry
C. The maximum breaking capacity it can handle
D. The rate of electrical oscillation it supports
Show the Answer
The rate of electrical oscillation it supports
Question 7
What Standards Compliance does the MCB have (e.g., IEC, ANSI)?
A. Current rating compliance
B. International safety and performance standards
C. Voltage rating compliance
D. Frequency rating compliance
Show the Answer
International safety and performance standards
Question 8
What is the Manufacturer’s Name or Logo on the MCB?
A. Indicates the current rating
B. Indicates the compliance standards
C. Indicates the breaking capacity
D. Indicates the manufacturer identity
Show the Answer
Indicates the manufacturer identity
Question 9
What is the Product Code or Part Number of the MCB?
A. Identifies the current rating
B. Identifies the frequency rating
C. Identifies the specific model and specifications
D. Identifies the voltage rating
Show the Answer
Identifies the specific model and specifications
Question 10
What Certification Marks does the MCB have (e.g., UL, CE)?
A. Marks indicating compliance with safety standards
B. Marks indicating tripping characteristics
C. Marks indicating voltage rating
D. Marks indicating current rating
Show the Answer
Marks indicating compliance with safety standards
Question 11
What is the Short Circuit Current Rating (SCCR) of the MCB?
A. The maximum frequency it can handle
B. The maximum operating temperature it can withstand
C. The maximum short-circuit current it can safely interrupt
D. The maximum voltage it can handle
Show the Answer
The maximum short-circuit current it can safely interrupt
Question 12
What is the IP Rating of the MCB?
A. Indicates the voltage rating
B. Indicates the degree of protection against dust and water
C. Indicates the current rating
D. Indicates the frequency rating
Show the Answer
Indicates the degree of protection against dust and water
Question 13
What is the Operating Temperature Range of the MCB?
A. The temperature range within which it operates safely
B. The frequency range it can handle
C. The maximum current it can carry
D. The voltage range it can handle
Show the Answer
The temperature range within which it operates safely
Question 14
What is the Mounting Type of the MCB?
A. Indicates its voltage rating
B. Indicates how it is installed in the panel
C. Indicates its breaking capacity
D. Indicates its current rating
Show the Answer
Indicates how it is installed in the panel
Question 15
What is the Terminal Capacity of the MCB?
A. Indicates the maximum current it can handle
B. Indicates the tripping characteristic
C. Indicates the maximum voltage it can handle
D. Indicates the wire size it can accommodate
Show the Answer
Indicates the wire size it can accommodate
Question 16
What is the Endurance (Mechanical and Electrical) of the MCB?
A. Indicates its protection against dust and water
B. Indicates its voltage rating
C. Indicates its current rating
D. Indicates how long it lasts under normal operation
Show the Answer
Indicates how long it lasts under normal operation
Question 17
What is the Insulation Voltage of the MCB?
A. Maximum breaking capacity it can handle
B. Maximum operating temperature
C. Voltage the insulation can withstand
D. Maximum current it can handle
Show the Answer
Voltage the insulation can withstand
Question 18
What is the Impulse Withstand Voltage of the MCB?
A. Ability to handle high frequencies
B. Ability to withstand transient overvoltages
C. Voltage rating of the MCB
D. Current rating of the MCB
Show the Answer
Ability to withstand transient overvoltages
Question 19
What is the Ambient Temperature for the MCB?
A. Temperature around the MCB during operation
B. Maximum voltage it can handle
C. Maximum current it can handle
D. Maximum breaking capacity it can handle
Show the Answer
Temperature around the MCB during operation
Question 20
What is the Derating Information for the MCB?
A. Frequency rating adjustments
B. Current rating adjustments
C. Adjustments due to temperature or altitude
D. Voltage rating adjustments
Show the Answer
Adjustments due to temperature or altitude
Question 21
What is the Response Time of the MCB?
A. Time it takes to handle maximum voltage
B. Time it takes to handle maximum current
C. Time it takes to interrupt the current
D. Time it takes to reset after tripping
Show the Answer
Time it takes to interrupt the current
Question 22
What is the Power Loss of the MCB?
A. Frequency loss during operation
B. Energy dissipated during normal operation
C. Current loss during operation
D. Voltage loss during operation
Show the Answer
Energy dissipated during normal operation
Question 23
What is the Manufacturing Date or Batch Number of the MCB?
A. Indicates the voltage rating
B. Indicates the breaking capacity
C. Indicates the date of production
D. Indicates the current rating
Show the Answer
Indicates the date of production
Question 24
What are the Locking Options for the MCB?
A. Options for connecting wires to the MCB
B. Options for adjusting the current rating
C. Options for mounting the MCB
D. Options to secure the MCB in the ‘off’ position
Show the Answer
Options to secure the MCB in the ‘off’ position
Question 25
What is the Indicator Status of the MCB?
A. Shows the voltage rating
B. Shows the breaking capacity
C. Shows whether the MCB is on or off
D. Shows the current rating
Show the Answer
Shows whether the MCB is on or off
Read Next:
- Automatic Motor START and STOP
- Answers on Motors and Generators
- Motor Control Center Signal Interface
- Synchronous Motors MCQ Questions
- Three Phase Induction Motors Questions
