University : Tripura University
Course : Diploma Electrical Engineering
Semester: V
Subject: TRANSMISSION & DISTRIBUTION OF POWER
Exam Year: 2010
Type of Question Paper: University Questions Old and Previous Years
Question Paper Format : Text
Tripura University
TRANSMISSION & DISTRIBUTION OF POWER
Third Year (Electrical)
5th Semester, Diploma Electrical Engineering
Time- 1/2 Hrs Full Marks-15
Group-B
Ans ques. No. one and 2 from the rest.
1. Select the accurate ans from the provided alternatives [Marks 3x1=3]
a) Power factor is describe as_________.
(i)KVA/KW, (ii)KW/KVA, (iii)VI/Watt, (iv)KVAR/KVA
b) Service connection is provided from____
(i) feeder, (ii) Distribution, (iii) either from feeder or distribution, (iv) from none of them
c) The size of feeder is based on ____
(i) Voltage, (ii)Voltage drop, (iii)Current carrying capacity, (iv) frequency.
2. a) Explain the term voltage regulation and transmission efficiency as applied to transmission line.[Marks 2]
b) An overhead 3-phase transmission line delivers 5000Kw and 22KV at 0.8 p.f. lagging. The resistance and reactance of every conductor is 4? and 6? respectively. Determine,
(i) Sending end voltage, (ii) Percentage regulation,(iii) Transmission efficiency. [Marks 4]
3. a) State the advantage of low power factor.
b) A synchronous motor improves the power factor of a load of 250KW from 0.8 lagging to 0.95 lagging.Simultaneously the motor carries a load of 80kw. Find-(i) the leading KVAR taken by the motor,(ii) KVA rating of the motor, (iii) power factor at which the motor operates. [Marks 2+4=6]
4. a) Describe the terms- (i)feeder, (ii) Distribution. [Marks 2]
b) A single phase a.c distribution AB is fed from end A and has a total impedance of (0.1+j0.2) ohm. At the far end, the voltage Vb=240v and the currents 1000A at a p.f. of 0.8 lagging. At the mid point M, a current of 150A is tapped at a p.f of 0.6 lagging with reference to the voltage at the far end. Calculate the supply voltage VA and phase angle ranging from VA and VB. [Marks 4]
Course : Diploma Electrical Engineering
Semester: V
Subject: TRANSMISSION & DISTRIBUTION OF POWER
Exam Year: 2010
Type of Question Paper: University Questions Old and Previous Years
Question Paper Format : Text
Tripura University
TRANSMISSION & DISTRIBUTION OF POWER
Third Year (Electrical)
5th Semester, Diploma Electrical Engineering
Time- 1/2 Hrs Full Marks-15
Group-B
Ans ques. No. one and 2 from the rest.
1. Select the accurate ans from the provided alternatives [Marks 3x1=3]
a) Power factor is describe as_________.
(i)KVA/KW, (ii)KW/KVA, (iii)VI/Watt, (iv)KVAR/KVA
b) Service connection is provided from____
(i) feeder, (ii) Distribution, (iii) either from feeder or distribution, (iv) from none of them
c) The size of feeder is based on ____
(i) Voltage, (ii)Voltage drop, (iii)Current carrying capacity, (iv) frequency.
2. a) Explain the term voltage regulation and transmission efficiency as applied to transmission line.[Marks 2]
b) An overhead 3-phase transmission line delivers 5000Kw and 22KV at 0.8 p.f. lagging. The resistance and reactance of every conductor is 4? and 6? respectively. Determine,
(i) Sending end voltage, (ii) Percentage regulation,(iii) Transmission efficiency. [Marks 4]
3. a) State the advantage of low power factor.
b) A synchronous motor improves the power factor of a load of 250KW from 0.8 lagging to 0.95 lagging.Simultaneously the motor carries a load of 80kw. Find-(i) the leading KVAR taken by the motor,(ii) KVA rating of the motor, (iii) power factor at which the motor operates. [Marks 2+4=6]
4. a) Describe the terms- (i)feeder, (ii) Distribution. [Marks 2]
b) A single phase a.c distribution AB is fed from end A and has a total impedance of (0.1+j0.2) ohm. At the far end, the voltage Vb=240v and the currents 1000A at a p.f. of 0.8 lagging. At the mid point M, a current of 150A is tapped at a p.f of 0.6 lagging with reference to the voltage at the far end. Calculate the supply voltage VA and phase angle ranging from VA and VB. [Marks 4]
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