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Name of the College : Government Engineering College
Department : Computer Science Engineering
Subject Name : ELECTRICAL ENGINEERING DRAWING
Year : May 2013
Degree : B.Tech
Sem : VI
Website : gecwyd.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/pescemandya.org/4702-s6_eee_ns_may_2013.pdf

Electrical Engineering Drawing :

VI Semester B.Tech. Degree (Reg./Sup”/lmp. – lncluding Part Time) Examination, MaY 2013

Related : Government Engineering College Graph Theory & Combinatorics B.Tech Question Paper : www.pdfquestion.in/4699.html

Time.3 Hours Max. Marks : 100
1. a) Draw the developed winding diagram of a six pole, eighteen armature slots, double layer, full pitch lap wound DC generator fix the poles. Draw the sequence diagram. Fix the position and polarity of brushes. Mark the direction of rotation of armature.
b) Draw the single line diagram of 33 kV substation showing all the necessary equipments. 10
OR
2. a) Design and draw the developed winding diagram for an alternator with following details:
No” of poles = 2 ; No. of phase = 3 ; No. of slots =24 ;Winding = single layer,
Iap short pitched by one slot.
b) Draw the single tine diagram of a66111 kV substation with the following details:
i) 65 kV incoming line – 2 Nos.
ii) Line OCB’s 66 kV – 2 Nos.
iii) Step down transformer 66 kV/11 kV – 2 Nos.
iv) Bus coupler for HT side onlY.
v) Feeders 11 kV radiating from L, bus – 4 Nos.
vi) L.T. circuit breakers for feeders – 4 Nos.
vii) Duplicate bus bar for H.T. and L.T. to be provided
viii) Position of lightning arresters, CT’s and PT’s.
3. a) Draw neatly to a convenient scale the front elevation and plain in full section of a 3 phase core type poneer transformer as perthe main dimensions given below
Diameter of the core circum circle, d = 23 cm
3 – step core construction,
Window height = 47 cm
Overall width = ov€rsll height of core = 98 cm”
Secondary winding (LT) :
lnside dia. = 25 cm.
Outside dia. = 27.1 cm.
Winding in 2layers
No. of turns per layer = 21
secondary conductor = 6 strips in parallel each of g.55 mm x 3.2 mm.
Primary Winding (HT) :
lnside dia. of winding = 32 cm
Outside dia. of winding = 37 cm
No. of turns = 750
I coils of 83 turns each, arranged in 7 layers, height 3.7s cm, 2 coils of 43 turns each, height 2.35 cm.
Primary conducto r = 2.64 mm dia; 33 mm dia with insulation .
b) Draw to half scale sectional end elevation and sectionat front elevation of a main pole of DC machine with the following dimensions :
Width of the pole – 168 mm ; pole arc = 24A mm
Radius of pole aIC = 336 mm
Height of pole with shoe = 228 mm
Height of the pole core = 192 mm
Diameter of rivet used = 9 mrn
Axial length of pole aIC = 216 mm
Thickness of yoke = 114 mm
Show the arrangement of fixing pole to yoke”
OR
4. a) Draw the half sectional elevation and full sectional plan of a single phase shell type transformer for the dimensions given below
Core = 38 cm ; Core length = 54 cm ,
Core depth = 37 cm ; Core width = 14 cm ;
Window size = 23 cm x 24 cm ;
No. of LV coil – 4 ; No. of turns per coil = 10
No. of layers of LV coil = 5 ;
No. of turns Per laYer of LV coil = 2
Cross section of the LV conductor 125 sq. mm
No. of HV coils = 4
No. of turns Per coil in HV = 40;
No. of layers of HV ssil = 10 i
No. of turns Per laYer in HV = 4 ;
Cross section of the HV conductor = 28 sq. mm.
Average height of one turn = 1.8 cm. 15
b) Draw to suitable scale :
i) End view and
ii) Longitudinalview.
Both top half in section for a DC motor”
Details of yoke _ outer diameter = 49.6 cm
lnner diameter = 40 cm
Le.ngth = 16 cm.
Details of Main pole – Number = 4
Width = 6.08 cm
Height = 9.6 cm
Length = 12.8 cm
Air gap length = 1.6 mm
Details of lnter pole * Number = 4
Width = 9.5 cm
Height = 11
Air gaP = 2.5 mm’
5. a) The rotor of an alternator consists of a shaft, a spider and poles. Draw the half sectional end view of the rotor assembly with the following dimensions. Scale =t/zfull size.
i) Shaft – it is made of mild steel and solid circular radius of the shaft = 3 cms.
ii) Spider – it is made of cast steel and has four dovetail slots at its outer surface. The angle between the centre line of the slots is 90. The spider is a square of sides 20 cms.
Distance between the centre of the shaft and bottom of the dovetail slot = 8 cms.
Height of the dovetail size of slot plate = 6 x 2 cm.
Width of the dovetail slot at the bottom = 5 cms.
Width of the dovetail slot at the top = 2.5 cms.
On both the sides of the dovetait slot there is a hole of diameter = 0.5 cm for fixing the retaining plate to the spider.
iii) Pole Core – lt is made of sheet steet lamination and they are fixed rigidly
by suitable bolts and nuts at regular intervals.
Height of the dovetail in the pole core = 2 cm.
Height of the core above dovetail = g cm
Width of pole core = 10 cms.
Width of pole face = 5 cms.
Radius of the pole arc at the top of the pole face from the centre of shaft = 20 cms.
iv) Pole winding – Made of enamelled wire and suitably insulated. Height of pole winding – 8 cms. Width of pole winding = 1S cms. lnsulation between core and winding = A.Zcms. 15
b) Draw the half sectional elevation and half sectional end view of a three phase
slip-ring induction motor with the following dimensions :
lnside dia of stator = 32 cm
External dia of stator= 48 cm
Stator length = 22 cm
Stator overhang of each side = 10 cm
Length of stator frame = 40 cm
Air gap length = 0.2 cm
‘ No. of slots in stator = 45
Size of stator slot = 1.2 cm x 6 cm, Open type
No. ol slots in rotor = 36
Size of rotor slot = 0.85 cm x 5.5′ cm, open type
Shaft dia. = 7.5 cm
Total length of motor at foot step – 48 cm
Height of base uPto eYe bolt = 72cm’
Width of foot steP = 78 cm
Footthickness=5cm
Length of foot = 10 cm’