Page 27 - WCS - Electrical

6 −
3 −
60
6 −
4
3 −
=
=
Rs.30
4
60
=
2
Rs.30
=
4
8
2
9
3 +
6
9
3
3 +

50
8
4
=
=
×
30 =
x =
50
4 +
8
4
180
30 =
10teeth
×
180
1

2.5
1
25days
x =
=
20

=
25days
20
12 4 + 8 6 4 1 = = 12 8 = 8 3 x = x = = 70 × 7 2.5 Δh 70 × 7 1 10teeth
=
1 800 × = 40mm Δh = 1 l 20
20
800 × = 40mm l 20
WORKSHOP CALCULATION & SCIENCE - CITS
20
1
1 1400 × = 70mm
20
1400 × = 70mm
Speed ratio = 400 : 300
20
Teeth ratio = 24:T
400
T
400 T =
= 300 24
300 24
24 × 400
T =
\
24 × 400 = 32Teeth
300
T = = 32Teeth
300
Find the ratio of A:B:C
120
30gallons/

=
day
120 = If A:B= 2:3 and B:C=4:5
4
30gallons/
day
4 A:B = 2:3
B:C = 4:5
A:B = 8 :12 (Ratio 2:3 multiply by 4)
B:C = 12:15 (Ratio 4:5 multiply by 3)
\ A:B:C = 8:12:15
Assignment
1 l1 : l2 = 2:3 5 D : d = 1.75: 1
L = 2.75 metres D = 35 mm
l1 = ______ metres d = ______ mm
l2 = ______ metres

2 d: L of shaft = 2:7 6 a:s = 5:1
d = 40 mm s = 1.5mm
L = ______ mm a =______ mm
3 − 4 6 − 8
= 60
4 8 = = Rs.30
2
7 A:B=9:12
3 + 6 9 3 B:C=8:10
3 4 + 8 = 12 = 4 50 D : L=1:10 Then A:B:C=___________
30 =
x =
10teeth
×
L=150mm 8 A:B=5:6
180
D=______ mm
1 70 × 2.5 B:C=3:4
20 x = 7 = 25days Then A:B:C= ______
9 A:55=9:11
Δh 1
1 = A = __________
800 × = 40mm l 20
20
4 I = 140 mm 10 15:9.3=40:x

1 D h = _____ mm x = __________
1400 × = 70mm
20
400 T
=
300 24
14
24 × 400 CITS : WCS - Electrical - Exercise 2
T = = 32Teeth
300
120
= 30gallons/ day
4