1 The maximum variation allowed in voltage of LV & MV AC supply is [ d ]
(a) ± 2 %
(b) ± 3 %
(c) ± 4 %
(d) ± 5 %
Answer - (d) ± 5 %
2 The maximum variation allowed in voltage of HV& EHV AC supply is [ c ]
(a) ± 8.5 %
(b) ± 10.5 %
(c) ± 12.5 %
(d) ± 14.5 %
Answer - (c) ± 12.5 %
3 The maximum variation allowed in frequency of AC supply is [ b ]
(a) ± 2 %
(b) ± 3 %
(c) ± 4 %
(d) ± 5 %
Answer - (b) ± 3 %
4 Clearance of the lowest conductor (across the street) from the ground for LT and MT lines should be [ c ]
(a) 17 ft.
(b) 18 ft.
(c) 19 ft.
(d) 20 ft.
Answer - (c) 19 ft.
5 Clearance of the lowest conductor (across the street) from the ground for HT lines should be [ d ]
(a) 17 ft.
(b) 18 ft.
(c) 19 ft.
(d) 20 ft.
Answer - (d) 20 ft.
6 Clearance of the lowest conductor (along the street) from the ground for LT and MT lines should be [ b ]
(a) 17 ft.
(b) 18 ft.
(c) 19 ft.
(d) 20 ft.
Answer - (b) 18 ft.
7 Clearance of the lowest conductor (along the street) from the ground for HT lines should be [ c ]
(a) 17 ft.
(b) 18 ft.
(c) 19 ft.
(d) 20 ft.
Answer - (c) 19 ft.
8 Clearance of the lowest conductor vertical above the building for LT and MT lines should be [ c ]
(a) 4 ft.
(b) 6 ft.
(c) 8 ft.
(d) 12 ft.
Answer - (c) 8 ft.
9 Clearance of the lowest conductor vertical above the building for HT lines should be [ d ]
(a) 4 ft.
(b) 6 ft.
(c) 8 ft.
(d) 12 ft.
Answer - (d) 12 ft.
10 Clearance of the conductor Horizontal from the building for LT and MT lines should be [a ]
(a) 4 ft.
(b) 6 ft.
(c) 8 ft.
(d) 12 ft.
Answer - (a) 4 ft.
11 Clearance of the conductor Horizontal from the building for HT lines should be [ b ]
(a) 4 ft.
(b) 6 ft.
(c) 8 ft.
(d) 12 ft.
Answer - (b) 6 ft.
12 The on line vertical spacing between the conductors for 400/230 V, 150 ft. span lines should be[ b ]
(a) 1’3”
(b) 1’6”
(c) 2’
(d) 2’6”
Answer - (b) 1’6”
13 The on line vertical spacing between the conductors for 400/230 V, 150-250 ft. span lines should be [ c ]
(a) 1’3”
(b) 1’6”
(c) 2’
(d) 2’6”
Answer - (c) 2’
14 The on line vertical spacing between the conductors for 11 kV lines should be [ c ]
(a) 1’3”
(b) 1’6”
(c) 2’
(d) 2’6”
Answer - (c) 2’
15 The on line horizontal spacing between the conductors for 400/230 V, 150 ft. span lines should be [ a ]
(a) 1’3”
(b) 1’6”
(c) 2’
(d) 2’6”
Answer - (a) 1’3”
16 The on line horizontal spacing between the conductors for 400/230 V, 150-250 ft. span lines should be [ c ]
(a) 1’3”
(b) 1’6”
(c) 2’
(d) 2’6”
Answer - (c) 2’
17 The on line horizontal spacing between the conductors for 11 kV lines should be [ d ]
(a) 1’3”
(b) 1’6”
(c) 2’6”
(d) 3’9”
Answer - (d) 3’9”
18 The clearance between the conductor and pole for 400/230 V, 150 ft span lines, should be
(a) 6”
(b) 9”
(c) 12”
(d) 1’3”
Answer - (a) 6”
19 The clearance between the conductor and pole for 400/230 V, 150-250 ft span lines, should be [ b ]
(a) 6”
(b) 9”
(c) 12”
(d) 1’3”
Answer - (b) 9”
20 The clearance between the conductor and pole for 11 kV lines, should be [ c ]
(a) 6”
(b) 9”
(c) 12”
(d) 1’3”
Answer - (c) 12”
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