TS ECET EEE 2016-4

1. The concept of self GMD is applicable for

A. Capacitance only
B. Inductance only
C. Both capacitance and inductance
D. Both capacitance and resistance

Answer : Inductance only
Explain:-

2. The advantage of bundled conductors is

A. High voltage gradient
B. High corona loss
C. High surge impedance
D. Increase in transmission capacity

Answer : Increase in transmission capacity
Explain:-

3. If Y/2, Z, Y/2 are the parameters of a nominal T-type medium transmission line, then A; B,C,D constants of the above model are given by: (where Z = (R+jX))

A. A=(1+(YZ/2)), B=(1+(YZ/4)),C=Y, D=(1+(YZ/2))
B. A=(1+(YZ/2)), B=Z(1+(YZ/4)),C=Y(1+(YZ/4)), D=(1+(YZ/2))
C. A=Z(1+(YZ/2)), B=Z(1+(YZ/4)),C=Y, D=Y(1+(YZ/2))
D. A=(1+(YZ/2)), B=Z(1-(YZ/2)),C=Y(1-(YZ/2)), D=(1-(YZ/2))

Answer : A=(1+(YZ/2)), B=(1+(YZ/4)),C=Y, D=(1+(YZ/2))
Explain:-

4. For a lossless (r=0, g=0) long transmission line, the surge impedance (Zc) is given by

A. √(L/C)
B. L/C
C. √(C/L)
D. √(1/LC)

Answer : √(C/L)
Explain:-

5. Corona Loss can be reduced by using

A. Small diameter conductors only
B. Less height of the conductors from the ground
C. Bundled conductors only
D. Both small diameter and bundled conductor

Answer : Bundled conductors only
Explain:-

6. The Sag of a conductor between two supports of equal length takes the form of

A. Semi circle
B. Catenary
C. Hyperbola
D. Parabola

Answer : Catenary
Explain:-

7. The main requirement of the insulating material used for cable is

A. Low insulation resistance
B. It should be non-hygroscopic
C. Low dielectric strength
D. It should be hygroscopic

Answer : It should be non-hygroscopic
Explain:-

8. Maximum voltage appears across the disc the line conductors

A. Nearest to
B. Middle of
C. Away from
D. Between middle and away from the conductors

Answer : Nearest to
Explain:-

9. A single core cable has conductor diameter of d1 cm, and insulation thickness of r2 cm. If the specific resistance of the insulation is P ohm - cm, The formula used to calculate the insulation resistance R for a T' km length of the cable is

A. (ρ×10^(-2))(2πl×(10^3)log_e ((r1+r2)/r1) Ω
B. ((2πl×(10^3)) )/((ρ×10^(-2))) log_e ((r1+r2)/r1) Ω
C. (ρ×10^(-2))(2πl×(10^3) log_e ((r1+r2)/2) Ω
D. ((ρ×10^(-2)))/((2πl×10^3) ) log_e ((r1+r2)/r1) Ω

Answer : ((ρ×10^(-2)))/((2πl×10^3) ) log_e ((r1+r2)/r1) Ω
Explain:-

10. The main drawback of the radial distribution system are
(a) The consumers are not dependent on single feeder
(b) The end of the distributor nearest of feeding point will not be heavily loaded
(c) The consumer at the distant end of distributors will be subjected to serious voltage fluctuations when load on the distributor changes

A. (a) and (b) only
B. (b) and (c) only
C. (c) only
D. (a) only

Answer : (c) only
Explain:-