Unit 01( CO 01) , Unit 02( CO 02) and Unit 03( CO 03)
Sample questions
1) Enlist features of NEC 2011/ 2023
2) State the types of electrical installations
3) For industrial commercial installations , specify the standard voltage levels
4) State the purpose of estimating and costing/contracting.
5) Justify the importance of good estimator or state the need of good estimator.
6) Enlist the essential elements of estimation and costing.
7) State general rules for commercial wiring installation.
8) Draw the symbol of the following a)exhaust fan b)tube light c)16 amps socket d)
Intermediate switch e) one way switch e)power distribution board without switches
f) neutral link g)bell
9) Identify the following symbols
10) Name the different types of contract and explain any one of them.
11) List out the advantages and drawbacks of rate contract.
12) Elaborate the meaning of tender, bid, contract.
13) Prepare a quotation format for electrical wiring material
14) Prepare a comparative statement of wire1.5 mm, switches 6 amps, socket 6amps and pvc
conduit 19 mm in required proforma.
15) State the advantages of single line diagram
16) State the meaning of a) single line b) multiline diagram
17) List out the two common installation methods for electrical wiring.
18) State Factors to be considered in selecting the type of wiring
19) Draw schematic diagram of the given wiring diagram
20) Draw single line diagram for the given wiring diagram.
21) Draw wiring diagram from the given single line diagram.
22) State the necessity of reading ability towards electrical and civil drawing
23) A residential unit is having following load
5 lamps of 60 W each, 3 lamps of 40 W each, 4 ceiling fans of 60 W each iv) 3 sockets of 6 A
having 100 W each v) 4 sockets of 16 A having 1000 W each. Calculate: 1. Total lighting
load
2. Total power load 3. No. of sub-circuits for lighting and power.
24) State the general requirements of electrical installation.
25) State any 8 rules for electrical installation.
26) Write the miscellaneous points to be checked during inspection of internal electrical wiring.
27) Write the points to be checked during inspection of internal electrical wiring a) service
connection b) main switch board c) Lighting circuits d) switch boards.
28) Enlist various tests to be performed for new wiring / installation.
29) Explain in brief the method of insulation resistance test. (IS 732)
30) Explain in brief the method of earth continuity test (IS 732)
31) Explain in brief the method of polarity test of single pole switches. (IS 732)
32) Classify the industrial installations / industries based on power levels.
33) Compare industrial and non industrial loads on the basis of any four points
34) Enlist any four / eight characteristics of industrial installation
35) Explain in brief design considerations for industrial installation.
36) List out the material required for the installation of the following
