81. In a 3-core extra-high voltage cable, a metallic screen around each core¬i,..ulation i. provided to
(a) facilitate heat dissipation
(b) give mechanical strength
(c) obtain radial electric stress
(d) obtain longtiudinal electric stress
Ans: c
82. The aingle pbase line of 280 V and 3 pha.e line of 400 V which feed different domestic circuit. and induetrial loade represent
(a) primary distribution
(b) secondary distribution
(c) secondary transmission
(d) none of the above
Ans: b
83. The transmission line feeding power on either side of the main transmission line i. called
(a) Secondary distribution
(b) Secondary transmission
(c) Primary transmission
(d) Primary distribution
Ans: b
84. Series capacitive compensation on EHV transmission lines is used to
(a) reduce the line loading
(b) improve the stability of the system
(c) reduce the voltage profile
(d) improve the protection of the line
Ans: d
85. At a particular unbalanced node, the real powers specified are Leaving the node : 20 Mw, 25 Mw, Entering the node: 60 Mw, 30 MW. The balance power will be
(a) 30 MW leaving the node
(b) 45 MW leaving the node
(c) 45 MW entering the node
(d) 22.5MW entering the node and 22.5 MW leaving the node
Ans: b
86. When a d.c source is switched is purely inductive, the current response is
(a) an exponentially rising curve
(b) an exponentially decaying curve
(c) a straight line passing through the origin
(d) a straight line off-set from the origin
Ans: c
87. If transformer frequency is changed from 60 Hz, to 60 Hz the ratio of eddy current loss 60 Hz to 50 Hz, at constant voltage will be
(a) 5/6
(b) 25/36
(c) 6/5
(d) 1.0
Ans: d
88. In load flow analysis, the load connected at a bUs is represented as
(a) constant current drawn from the bus
(b) constant impedance connected at the bus
(c) voltage and frequency dependent source at the bus
(d) constant real and reactive drawn from the bus
Ans: d
89. If the reference bUB is changed in two load flow runs with same Bystena data and power obtained for reference bur taken a. specified P and Q in the latter run
(a) the system losses will be unchanged but complex bus voltage will change
(b) the system losses will be changed but complex bus voltages remain unchanged
(c) the system losses as well be as complex bus voltage will change
(d) the system losses as well be as complex bus voltage will unchange
Ans: a
90. A square matrix is called singular if its
(a) determina is unity
(b) determinant is zero
(c) determinant is infinity
(d) rank is unity
Ans: b
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
(a) facilitate heat dissipation
(b) give mechanical strength
(c) obtain radial electric stress
(d) obtain longtiudinal electric stress
Ans: c
82. The aingle pbase line of 280 V and 3 pha.e line of 400 V which feed different domestic circuit. and induetrial loade represent
(a) primary distribution
(b) secondary distribution
(c) secondary transmission
(d) none of the above
Ans: b
83. The transmission line feeding power on either side of the main transmission line i. called
(a) Secondary distribution
(b) Secondary transmission
(c) Primary transmission
(d) Primary distribution
Ans: b
84. Series capacitive compensation on EHV transmission lines is used to
(a) reduce the line loading
(b) improve the stability of the system
(c) reduce the voltage profile
(d) improve the protection of the line
Ans: d
85. At a particular unbalanced node, the real powers specified are Leaving the node : 20 Mw, 25 Mw, Entering the node: 60 Mw, 30 MW. The balance power will be
(a) 30 MW leaving the node
(b) 45 MW leaving the node
(c) 45 MW entering the node
(d) 22.5MW entering the node and 22.5 MW leaving the node
Ans: b
86. When a d.c source is switched is purely inductive, the current response is
(a) an exponentially rising curve
(b) an exponentially decaying curve
(c) a straight line passing through the origin
(d) a straight line off-set from the origin
Ans: c
87. If transformer frequency is changed from 60 Hz, to 60 Hz the ratio of eddy current loss 60 Hz to 50 Hz, at constant voltage will be
(a) 5/6
(b) 25/36
(c) 6/5
(d) 1.0
Ans: d
88. In load flow analysis, the load connected at a bUs is represented as
(a) constant current drawn from the bus
(b) constant impedance connected at the bus
(c) voltage and frequency dependent source at the bus
(d) constant real and reactive drawn from the bus
Ans: d
89. If the reference bUB is changed in two load flow runs with same Bystena data and power obtained for reference bur taken a. specified P and Q in the latter run
(a) the system losses will be unchanged but complex bus voltage will change
(b) the system losses will be changed but complex bus voltages remain unchanged
(c) the system losses as well be as complex bus voltage will change
(d) the system losses as well be as complex bus voltage will unchange
Ans: a
90. A square matrix is called singular if its
(a) determina is unity
(b) determinant is zero
(c) determinant is infinity
(d) rank is unity
Ans: b
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
No comments:
Post a Comment