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22627 - ELECTRICAL ENGG
Electrical engineering (EET301)
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(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2) The model answer and the answer written by candidate may vary but the examiner may try to assess the understanding level of the candidate. 3) The language errors such as grammatical, spelling errors should not be given more Importance (Not applicable for subject English and Communication Skills). 4) While assessing figures, examiner may give credit for principal components indicated in the figure. The figures drawn by candidate and model answer may vary. The examiner may give credit for any equivalent figure drawn. 5) Credits may be given step wise for numerical problems. In some cases, the assumed constant values may vary and there may be some difference in the candidate’s answers and model answer. 6) In case of some questions credit may be given by judgement on part of examiner of relevant answer based on candidate’s understanding. 7) For programming language papers, credit may be given to any other program based on equivalent concept.
Q.
No.
Sub Q. N.
Answer Marking Scheme
- Attempt any FIVE of the following: 10 Marks a) Draw the symbol for i) Exhaust fan ii) Intermediate Switch Ans: i) Exhaust Fan ii) Intermediate Switch 1 Mark for each of two symbols
= 2 Marks
b) State any four IE rules for electrical installation. Ans: Rules for Electrical Installation: 1. Every installation is to be properly protected near the point of entry of supply cables by a two-pole linked main switch and a fuse unit. In a two wire installation if one pole is permanently earthed, no fuse, switch or circuit breaker is to be inserted in this pole. A 3- pole switch and fuse unit is to be used in 3-ph supply. 2. The conductors used are to be such that size of conductor should carry rated current and partial over load current safely. 3. The conductors installed are to be safe in all respects. 4. Every sub-circuit is to be connected to a distribution fuse board. 5. Every line (phase or positive) is to be protected by a fuse of suitable rating as per requirements. 6. A switch board is to be installed so that its bottom lies 1 to 1 meters above the ground floor. 7. A plugs and socket-outlets are to be of 3-pin type, the appropriate pin of socket being connected permanently to the earthing system.
½ Mark for each of any four rules
= 2 Marks
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
- All incandescent lamps, unless otherwise required, are to be hung at a height of 2. meters above the floor level. And ceiling fans are to be hung 2 meters above the floor.
- Lights and fans may be wired on a common circuit. Each sub-circuit is not to have more than a total ten points of lights, fans and socket-outlets. The load on each sub-circuit is to be restricted to 800 watts.
- No fuse and switch is to be provided in earthed conductor.
- Every circuit or apparatus is to be provided with a separate means of isolation such as a switch.
- All circuit or apparatus requiring attention are to be provided with means of access to it.
- In any building, light and fan wiring and power wiring are to be kept separate.
- In 3-Phase, 4-wire installation the load is to be distributed equally on all phases.
- No additional load is to be connected to an existing installation unless it has been ascertained that the installation can safely carry the additional load and that the earthing arrangements are adequate.
- Lamp holders used in bath rooms are to be constructed or shrouded in insulating materials and fitted with protective shield and earth continuity conductor is not to be size less than 7/0 mm.
- The metal sheaths or conduits for all wiring and metal coverings of all consuming apparatus or applications is to be properly earthed in order to avoid danger from electrical shock due to leakage or failure of insulation.
- Each sub-circuit is to be protected against excessive current (that may occur either due to over load or due to failure of insulation) by fuse or automatic circuit breaker.
- All light conductors are to be insulated or otherwise safe guarded to avoid danger. After completion of work the installations are to be tested (the test are to be carried out as described) before energization.
- Earth Resistance: should be very low for domestic installation it should be equal to or less than 5 ohms to 8 ohm c) Differentiate between non-industrial and industrial load. Ans: Sr. No. Basis Industrial Load Non-industrial Load
1 Location In industrial estate or MIDC area
In highly population density Residential / commercial area 2 Cost More Less 3 Precautions All precautions should be taken
All safety precautions should be taken 4 Supply Generally 3-ph, 400V AC supply is provided
Generally 1-ph, 230V AC supply is provided 5 Tariff Time-of-Day tariff Block rate tariff
1 Mark for each of any two bits = 2 Marks
d) State the purpose of guarding wire used in distribution lines Ans: Purpose of guarding wire used in distribution lines: Guarding wire is used to protect the personnel, lines or equipment in the event of fault. When distribution line conductor snaps (brakes down) during abnormal weather conditions such as heavy rains, storms and lightning, the live conductor touches the guard wire, which is earthed. Thus snapping of conductor creates earth fault, causing fuse to blow or protective relay to
2 Marks for correct answer
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
g) State the factors to be considered in selecting the type of wiring. Ans: Factors to be considered in selecting the type of wiring: 1. Cost of wiring 2. Durability 3. Accessibility 4. Appearance 5. Mechanical protection 6. Safety 7. Maintenance cost
1 Mark for each of any two factors = 2 Marks
- Attempt any THREE of the following: 12 Marks a) Two lamp points, one ceiling fan & one 5A socket to be controlled by individual switches. Draw i) Wiring diagram ii) Schematic diagram Ans: i) Wiring diagram:
ii) Schematic diagram
2 Marks
2 Marks
b) A residential unit is having following load: i) 4 lamps of 60 W each ii) 6 lamps of 40 W each iii) 4 ceiling fans of 60 W each iv) 6 sockets of 6 A having 100 W each v) 4 sockets of 16 A having 1000 W each Calculate:
- Total lighting load
- Total power load
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
Size of distribution board
No. of sub-circuits for L and F and power. Ans:
Total lighting load ( ) ( ) ( ) ( )
Total power load
No. of sub-circuits for L and F and power No. of lighting sub-circuit sub-circuits No. of power sub-circuit sub-circuits
Size of distribution board Since there are 2 lighting sub-circuits and 2 power sub-circuit, we require 4 way distribution board. It includes main MCB with other 2 MCBs for lighting sub-circuits and 2 more MCBs for power sub-circuits.
1 Mark for each bit = 4 Marks
c) Compare overhead and underground service connection on any eight points. Ans: Comparison between Overhead and Underground service connection: Sr. No. Basis Overhead service connection Underground service connection 1 Location Small cities and villages Modern cities 2 Cost Cheaper Expensive 3 Safety Less More
4 Appearance Appearance is poor and not so good
No cable is visible, so aesthetic look of building is not disturbed. 5 Identification of fault
Very easy to repair and clear the fault.
Very difficult to repair and clear the fault. 6 Cable Service cable is used Well insulated and armored underground cable is used
7
Environmental Impact
It gets impacted by the occurrences of environmental attacks (like lightning, windstorm, thunderstorm).
There are fewer chances of environmental attacks in an underground system.
8 Reliability Low reliability High reliability 9 Maintenance cost
High as the service connection is prone to more no. of faults
Low as the occurrence of fault is very less
10 Interference
Overhead service lines can interfere with communication lines.
Underground service connection does not interfere with communication lines.
½ Mark for each of any eight points = 4 Marks
d) Draw wiring diagram and single line diagram of three phase, 415V, 5 HP, Induction motor installation. Ans:
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
General requirements of electrical Installation: 1. Safety (Electrical & Mechanical) 2. Life. 3. Appearance. 4. cost 5. Maintenance & Repairing 6. Future expansion 7. Type of wires, wiring accessories and wiring methods. Explanation: 1) Electrical installation should be electrically and mechanically safe. All precautions should be taken. 2) Life of installation should be long. 3) Appearance should be good and decorative. 4) It should be economical 5) Maintenance & repairing should be simple and less. 6) Future expansion can be easily done. 7) For the better requirement the selection of wires, wiring method and wiring accessories with our economy is also very important 8) Precautions should be taken to prevent leakage of water into installation rooms. 9) Provide proper clearance for cable and Follow minimum wire bending OR Following requirements of Electrical installation:- 21. Every installation is to be properly protected near the point of entry of supply cables by a two-pole linked main switch and a fuse unit. In a two wire installation if one pole is permanently earthed, no fuse, switch or circuit breaker is to be inserted in this pole. A 3- pole switch and fuse unit is to be used in 3-ph supply. 22. The conductors used are to be such that size of conductor should carry rated current and partial over load current safely. 23. The conductors installed are to be safe in all respects. 24. Every sub-circuit is to be connected to a distribution fuse board. 25. Every line (phase or positive) is to be protected by a fuse of suitable rating as per requirements. 26. A switch board is to be installed so that its bottom lies 1 to 1 meters above the ground floor. 27. A plugs and socket-outlets are to be of 3-pin type, the appropriate pin of socket being connected permanently to the earthing system. 28. All incandescent lamps, unless otherwise required, are to be hung at a height of 2. meters above the floor level. And ceiling fans are to be hung 2 meters above the floor. 29. Lights and fans may be wired on a common circuit. Each sub-circuit is not to have more than a total ten points of lights, fans and socket-outlets. The load on each sub-circuit is to be restricted to 800 watts. 30. No fuse and switch is to be provided in earthed conductor. 31. Every circuit or apparatus is to be provided with a separate means of isolation such as a switch. 32. All circuit or apparatus requiring attention are to be provided with means of access to it. 33. In any building, light and fan wiring and power wiring are to be kept separate.
1/2 Mark for any four requirement = 2 Marks
2 Marks for any Two requirement explanation
1/2 Mark for any eight requirement = 4 Marks
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
- In 3-Phase, 4-wire installation the load is to be distributed equally on all phases.
- No additional load is to be connected to an existing installation unless it has been ascertained that the installation can safely carry the additional load and that the earthing arrangements are adequate.
- Lamp holders used in bath rooms are to be constructed or shrouded in insulating materials and fitted with protective shield and earth continuity conductor is not to be size less than 7/0 mm.
- The metal sheaths or conduits for all wiring and metal coverings of all consuming apparatus or applications is to be properly earthed in order to avoid danger from electrical shock due to leakage or failure of insulation.
- Each sub-circuit is to be protected against excessive current (that may occur either due to over load or due to failure of insulation) by fuse or automatic circuit breaker.
- All light conductors are to be insulated or otherwise safe guarded to avoid danger. After completion of work the installations are to be tested (the test are to be carried out as described) before energization.
- Earth Resistance: should be very low for domestic installation it should be equal to or less than 5 ohms to 8 ohm
- Insulation Resistance between conductor : should be very high for domestic installation it should be equal to or more than 1 mega ohm or it should not be less than =
c) Decide the rating of main switch, Motor switch, distribution board and cable for a industrial installation of having 2 motos of 3 HP and 5 HP. Ans: Note: Credits should be given to step wise numerical solution. In some cases, the assumed constant values may vary and there may be some difference in the candidate’s answers and model answer. Assuming ƞ = 0 and V = 415V. p.= 0. Rating for 5 HP, 3-Ph I :-
att
√
√
Starting current = So Use, the 4 mm 2 , 4 core copper cable of 500V, 50Hz with ICTP switch or MCB of 16A, 690V/ 450V. Rating for 3 HP, 3-Ph I :-
att
√
½ Mark
½ Mark
½ Mark
½ Mark
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
approximately we can assume requirement as 1 kg.
- Attempt any THREE of the following: 12 Marks a) Calculate the length of phase wire & neutral wire for the residential installation as shown in the Fig. No. 1.
Assume one 5A socket on each switch board. Assume height of rooms as 3 m. Ans: NOTE: Answers may vary depending upon wiring layout. Examiners are requested to credit the marks wisely. Assumptions:
- Main Board (MB) is at the height of 1 m considering ceiling height of 3 m
- Conduit runs at the height of 2 m.
- Switch Board at the height of 1 m from ground level.
- Tubes at the height of conduit run i 2 m
- Power socket at the height of 1 m and horizontally at the centre of the wall.
- D 1 & D 2 are the doors as shown in figure and each has width of 1 m & height 2 m Wiring Layout:
There will be two sub-circuits; One is lighting and other is for power socket.
1 Mark for wiring layout diagram
1 Mark for conduit length
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
Starting from Main Board (MB), the length of conduit required for lighting sub-circuit is given by, =0(Vup)+0(H)+1(Vdown)+1(H)+0(Vup)+2(H)+2(H)+ 0(Vdown) +2(H)+0(Vdown)+1(H)+1(Vdown)+2(H)+2(H)+ 0(Vdown) Where, H represents horizontal run on wall or ceiling and V represents vertical run on wall, may be up / down = 19 m Starting from Main Board (MB), the length of conduit required for power socket is given by, = 1(H)+2(H)+1(Vdown) (Remark: Initial Vertical up run of 0 m is already considered in lighting sub-circuit) = 4 m Total conduit length = 19 + 4 = 24 m Length of Neutral wire: i) For Lighting Circuit: = 0(Vup)+0(H)+1(Vdown)+1(H)+0(Vup)+2(H)+2(H)+ 0(Vdown) +2(H)+0(Vdown)+1(H)+1(Vdown)+2(H)+2(H)+ 0(Vdown) = 19 m ii) For power socket: = 0(Vup)+1(H)+2(H)+1(Vdown) = 5 m Length of Phase Wire: i) For Lighting sub-circuit: = 0(Vup)+0(H)+1(Vdown)+3(Vup) +3(H)+1(Vup)+7(H)+2(H)+ 0(Vdown) +2(H)+0(Vdown)+3(H)+3(Vdown)+5(H)+2(H)+ 0(Vdown) = 37 m ii) For power socket: = 0(Vup)+1(H)+2(H)+1(Vdown) = 5 m Total length of phase & neutral wire (1 mm 2 ) for lighting sub-circuit: = 19 + 37+ 10% = 57+5 = 62 m 63 m Total length of phase & neutral wire (2 mm 2 ) for power socket: = 5 + 5 + 10% = 10 + 1 = 11 m 12 m OR Using thumb rule, Total length of Phase & neutral wire (1 mm 2 ) for lighting sub-circuit, = 3 times length of Conduit + 10% extra = 3 (19) + 10% = 59 + 5 = 65 m 65 m Total length of phase & neutral wire (2 mm 2 ) for power socket: = 3 times length of Conduit + 10% extra =3(4) + 10% = 13 + 1 = 14 m 15 m
1 Mark for Phase + Neutral wire length for lighting sub- circuit
1 Mark for Phase + Neutral wire length for power sub- circuit
b) Prepare the schedule of material for industrial installation as shown in Fig. No.
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
3 MCB/ICTP 450V,16A 2
4 4 mm2, 4 core copper 9m 5 1 inch PVC Conduct 9m 6 DOL starter 1 7 1 inch saddle 30 8 8 SWG earthing wire 20m 9 60 cm x 60cm x6 mm Copper Earthing Plate 1 10 Earthing Sundry Lumsump 11 Earthing nut-board 2 12 R,Y,B Indication Lamp 3 13 Screw 3 inch length 10 14 Screw 1 inch length 10 15 Junction Box 4 Approx 16 4 x 6 Switch board with cutting 1 17 10 x 12 Switch board with cutting 1 18 Main Switch Board 1 19 Labour Charges at actual
1 Mark for each of any three Material = 3 Marks
c) State the methods of laying underground cables and write the list of material required for laying underground cable. Ans: Methods of laying underground cables: i) Direct Laying (Cables buried directly underground) ii) Draw-in-system iii) Solid system
List of material required for laying underground cable: 1) Sand 2) Bricks 3) China clay 4) Bitumen compound 5) Conduits, ducts or tubes made of either iron, clay or cement concrete
1 Mark for each of any two methods = 2 Marks
½ Mark for each of any four material = 2 Marks
d) Draw the single line diagram of HT (11kV) substation Ans: Single Line Diagram of HT (11kV) Substation:
(OR Any Other Equivalent Diagram)
4 Marks for Fully labeled diagram
2 Marks for Partially labeled diagram
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
e) Explain the on-off control used for the street light installation. Ans: On-off control used for the street light installation: On-off control for the street light installation can be easily implemented by manually switching the street lights at fixed time. The switching can be decided by observing the availability of sun shine. But manual management is liable to errors and ends up in energy wastage. Also, dynamically following the sun shine is manually unworkable. So the present trend is the introduction of automation and remote management solutions to manage street lighting. Street light monitoring and control is an automated system designed to increase the efficiency and accuracy by automatically timed controlled switching of street lights. The street light control system may include client-server mechanism where a user can directly interact with the web based application to manage the street lamp of any location from the single position. Usually street light control systems have been developed to monitor and reduce the use of power in town’s public street lighting system. It includes a monitoring circuit of street lights and individual lights with network operating protocols. In this system, the street lights are automatically switched ON once the sunlight goes below the visible region of our eyes and switched OFF when the ample amount of sun shine returns. The element used for sensing the light may be Light Dependent Resistor (LDR). The LDR’s resistance is inversely proportional to the light falling on it. When sun shine falls below certain level, the LDR resistance increases to high level, which is used in feedback loop in control circuitry to turn on the street lights using electromagnetically operated switch. During night time, no sun shine condition maintains LDR resistance high and street lights remain ON. However, in the morning when sun shine becomes sufficient to lower the LDR resistance, the feedback control loop is activated to turn off the electromagnetic switches, thereby switching off the street lights. OR Equivalent Answer
4 Marks for conceptual explanation of the scheme
5 Attempt any TWO of the following: 12 Marks 5 a) State the design considerations in case of industrial installation. Ans: Design considerations in case of industrial installation: 1) Find out output power of every machine in watts. (i) 1 HP = 735 w (ii) Assume power factor, if not given. (iii) Assume efficiency, if not given. 2) Find out Input power of every machine by assuming the efficiency of every machine.
- Find out Input current of every machine (i) For 1-phase machine.
1 Mark for each of any 6 relevant points with brief description = 6 Mark
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
- DC shunt/compound motors --- Three point starter/ Four point starter (vi) Selection of rating of Main switch The current rating of main switch is the starting current of one motor of highest rating plus full load current of remaining motor. (vii) Selection of rating of Distribution board The specification of the distribution board is decided from the no. of circuits to be fed from it. The voltage rating is decided by operating voltage of the circuits. The current rating is the highest starting current of the circuits fed from it. (viii) Type of supply required for every machine DC Single phase AC Three phase AC (ix) Earthing type and its size. Pipe earthing Plate earthing Chemical earthing 5 b) Estimate the main material required for a 2km overhead line to extend from existing line. Assume a span of 50m. Ans: NOTE: Examiner is requested to observe the assumptions made by students. Answers may vary depending upon the assumptions made. The credit should be given to the process followed to solve the problem.
As LT/HT line is not mentioned, students can solve by considering LT or HT line. Assuming 11kV HT line: Total length of line = 2km = 2000m Span between two poles = 50m No. of poles required= (2000/50) + 1 = 40+1 = 41 (if tap is taken from existing pole it can be 40) Insulators: 11kV pin type insulators (excluding start and end pole) = 41-2 = 39 x 3= 117 11kV strain type disc insulators = 3 each on start pole and end pole = 3 x 2 = 6 For HT line, cut-point is created after 5 spans. So for 40 or 41 pole line, there will be 7 cut- points and on each cut-point poles, 6 disk type insulators will be required. 11 kV strain type disc insulators on cut-point poles = 6 x 7 = 42 Total strain type disc insulators required = 6 + 42 = 48 Cross arms: Cross arms of suitable size (1 x 12 x 12) = 31 Cross arms of suitable size (2 x 12 x 12) one for each dead end structure = 2 Cross arms of suitable size (2 x 12 x 12) two for each cut-point = 14 Total Cross arms of (2 x 12 x 12) size = 16 Top insulator brackets excluding start and end pole = 41 Screw eye bolts and nuts 23cm x 1 for supporting earth wire on intermediate single pole structures = 39 x 2 =
1 Mark for each of any relevant 6 main items = 6 Marks
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
Knee bracing sets = 39 Conductor Length of ACSR conductor 6/1x2 mm = (3x2000)+5% for sagging and wastage =(3x2000x105/100)=6300m = 6 Length of No SWG GI wire for earthing (2runs) = 2km + 5% for sagging and wastage = (2x2x105/100) = 4 km Taking GI wire weight approximately as 100 kg per km. Weight of No SWG GI wire = 4 x 100 = 420kg Miscellaneous Guysets complete with guy plate (one for end pole and 2 for every 5th pole) = 1+ (2x7)= Guywire 7/8 SWG = 25kg Earthing sets (every pole is earthed) = 41 Danger plates one on every pole structure = 41 Barbed wire to be used as anti-climbing device = 60kg Estimate of the material Sr. No.
Description of the material Quantity required
Unit
1 PCC poles, 9m long 41 No. 2 ACSR conductor 6/1 x 2 mm or equivalent conductor
6 km
3 Pin insulators 11 kV along with pins 117 No. 4 11 kV strain disc insulator 48 No. 5 Cross arms 1 x 12 cm x 12 cm 31 No. 6 Cross arms 2 m x 12 cm x 12 cm 16 No. 7 Top insulator brackets 41 No. 8 Screw type bolts and nuts 23 cm x 1 cm 78 No. 9 No. 8 SWG GI wire for earthing 420 kg 10 Guy sets complete with guy plate and other accessories 15 No. 11 Guy wire 7/8 SWG 25 kg 12 Earthing set 41 set 13 Knee bracing sets 39 set 14 Danger plates 41 No. 15 Barbed wire 60 kg 16 Bolts and nuts of various sizes 60 kg 17 MS flats for clamps 10 Kg 18 Cement and concrete Lumpsum Lumpsum 19 Binding wire, PG clamps etc. Lumpsum Lumpsum OR Assuming LT line (3 phase 4 wire): Total length of line = 2m = 2000m Span between two poles = 50m No. of poles required= (2000/50) + 1= 40+1 = 41 (if tap is take from existing pole it is 40) Insulators: Assuming vertical configuration, 3 phase 4 wire LT shackle insulators for the poles (4 for each pole) = 4 x 41=
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
8 Eye Bolts and nuts of various sizes 9 Earthing set 10 Street light fittings, weather proof type 11 GI brackets of suitable length to support the light fitting 12 ICDP switch 250V, 15 A, Pole mounted 13 MS board with cover 14 Charcoal and sand 15 Cement and concrete 16 Binding wire, clamps, other sundry items 17 Sensors / controller for automatic ON/OFF switching of street light
6 Attempt any TWO of the following: 12 Marks
6 a) Prepare tender notice and quotation for supply for 3 phase, 200 kVA, 11kV/415V transformer for a polytechnic. Ans: Tender Notice
Sealed quotations are invited from reputed manufacturers & suppliers for supply of 3 phase 200KVA, 11 kV/415V transformer, quantity -01, to the under mentioned polytechnic as per the terms & conditions specified in tender form available in the office.
Estimated cost = Rs. 4 lacs Cost of blank tender form = Rs. 1000/- Earnest Money deposit (EMD) = Rs. 8000/-
Last date for issue the tender form & document is 31 July 2022 & it should be submitted before 5 pm of 16 August 2022.
Right of rejection the tender without any intimation is reserved. Tender form available place: ABC Polytechnic Name of the officer to contact –
Phone: Fax: e-mail Id: Terms and conditions:
- The tenderers shall be reputed manufacturer or supplier of Distribution Transformers and they should submit the documentary evidence in support of the same while submitting the technical bid.
- The tenderers shall pay either Earnest Money Deposit or submit valid certification of registration with National Small Industries Corporation (NSIC).
- The tenderers shall accept all Commercial Tender Conditions in TOTO.
- The tenderers shall submit Schedule of Guaranteed Performance and Other Technical Particulars as shown in the prescribed format.
- The tenderer shall submit their own delivery schedule in the prescribed format.
3 Marks for Tender notice
(Autonomous) (ISO/IEC - 27001 - 2013 Certified)
SUMMER – 2022 EXAMINATION Subject Name: Electrical Estimation &Contracting Model Answer:
22627: EEC
Quotation Letter Head of the Organization/firm
To, The Principal, ABC Polytechnic, ............
SUB: Quotation for Distribution transformer: 3-phase, 200 kVA, 11 kV/415V. Ref: Your tender / quotation notice dated ............
Dear Sir, With reference to the your tender / quotation notice, we are pleased to quote as follows:
Sr. No. Particulars Unit Price Total
1 3-phase, 200 kVA, 11 kV / 415 V Distribution transformer Rs. 3, 50,000/- Rs. 3,50,000/-
Terms & Conditions:
- All the prices quoted in this quotation are valid for 30 days from the date of this quotation.
- For any query, contact our office from 10 am to 6 pm on working days only.
- If you want breakdown of the quoted price, we will try where possible to clarify the quoted cost.
Sign of the Proprietor with seal
3 Marks for Quotation
6 b) A road 300m long is required to be illuminated by providing 40W fluorescent lamps with 222 candle power, the width of road is 4m. Design a street lighting scheme and estimate the material required if the scheme is to be estimated for obtaining minimum level of illumination of 0 lux. Ans:
4 Marks for stepwise design scheme
22627 - ELECTRICAL ENGG
Course: Electrical engineering (EET301)
University: Rashtrasant Tukadoji Maharaj Nagpur University
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