Class 12 Electronics Chapter 4 Installation of Residential Control Panel

Class 12 Electronics Chapter 4 Installation of Residential Control Panel Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Electronics Chapter 4 Installation of Residential Control Panel Question Answer and select need one. Class 12 Electronics Chapter 4 Installation of Residential Control Panel Notes Download PDF. AHSEC Class 12 Elective Electronics Question Answer English Medium.

Class 12 Electronics Chapter 4 Installation of Residential Control Panel

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Elective Electronics Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 12 Electronics Textbook Solutions English Medium for All Chapters, You can practice these here.

Installation of Residential Control Panel

Chapter: 4

Check Your Progress

A. Multiple choice questions:

1. A label does not contain which of the following information? 

(a) Load centre’s catalog number.

(b) Current rating. 

(c) Voltage rating. 

(d) Number of circuit breakers. 

Ans: (d) Number of circuit breakers. 

2. Which of the following meters is used to measure the amount of power consumed by the loads in a house? 

(a) Energy meter. 

(b) Ammeter.

(c) Voltmeter. 

(d) Multimeter. 

Ans: (a) Energy meter.

3. Neutral can be grounded at _________________. 

(a) Service entrance. 

(b) Downstream equipment.

(c) Upstream equipment. 

(d) Anywhere in the premises. 

Ans: (a) Service entrance.

4. Which of the following components is not involved in the interior of a load centre? 

(a) Busbars.

(b) Neutral bars. 

(c) Circuit breakers. 

(d) Light arrester.

Ans: (d) Light arrester.

5. A load centre is also called _________________ unit. 

(a) Control.

(b) Processing. 

(c) Logical. 

(d) Panel.

Ans: (a) Control.

6. Which of the following is the reason for heating effect in a wire? 

(a) Due to high voltage. 

(b) Due to high power.

(c) Due to thick conductor. 

(d) Due to high current.

Ans: (d) Due to high current.

7. Which of the following are load centre rating methods? 

(a) Full rating. 

(b) Series rating. 

(c) Full and series rating. 

(d) Parallel rating. 

Ans: (c) Full and series rating. 

8. Which of the following material is used to manufacture enclosure of load centre? 

(a) Iron. 

(b) Copper. 

(c) Wood. 

(d) Galvanised steel.

Ans: (d) Galvanised steel.

9. Which of the following methods are not used for distribution of electric power? 

(a) Residential distribution.

(b) Commercial distribution. 

(c) Industrial distribution. 

(d) Household distribution. 

Ans: (d) Household distribution.

10. Which of the following places can be earthed? 

(a) Domestic level. 

(b) Power distribution level. 

(c) Substation. 

(d) High tension line.

Ans: (c) Substation.

B. Fill in the blanks:

1. A _________________ system distributes electrical power throughout a building. 

Ans: Power distribution.

2. Load centres are covered by _________________. 

Ans: Trim assembly.

3. The two types of load centres are main ______________ and main _________________ only. 

Ans: Breaker, lug.

4. Main lug only load centres are sometimes referred to as _________________ or _________________ panels. 

Ans: Secondary or downstream panel.

5. The _________________ rating method is to select circuit protection devices with individual ratings equal to or greater than the available fault current. 

Ans: Series.

6. The enclosure of the outer box is made up of _________________. 

Ans: Galvanised steel.

7. Holes on an enclosure are known as _________________. 

Ans: Knockouts.

8. In earthing, coal and salt increases the _________________ of soil. 

Ans: Moisture.

9. The interior of an enclosure is covered by _________________ assembly. 

Ans: Trim.

10. High current rating of a circuit breaker is known as _________________.

Ans: Amperage. 

C. State whether the following statements are True or False:

1. Load centre as a single unit placed in a cabinet or enclosure can be mounted on the wall. 

Ans: True.

2. Current flow in a conductor always generates heat. 

Ans: True.

3. The trim assembly is the back portion of the load centre that covers the interior. 

Ans: False.

4. When overload occurs circuit breaker breaks the circuit. 

Ans: True.

5. Excessive current in a circuit is prevented by the use of overcurrent safety devices. 

Ans: True.

6. Earthing protects us from getting electric shock. 

Ans: False.

7. In overload conditions, circuits draw less current.

Ans: False.

8. Neutral buses are present in a main busbar. 

Ans: True.

9. Enclosures protect the box from external damage.

Ans: False.