Tta Papaer

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  • Topic: Standing wave, Thévenin's theorem, Voltage source
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BSNL TTA Question Paper: Network Filters and Transmission Lines Exam Name: TTA (Telecom Technical Assistant) Specialization: Section C - Network Filters and Transmission Lines Conducted By: BSNL (Bharat Sanchar Nigam Limited) Conducted In: December 2007 Number of Questions: 50 Maximum Marks: 250 Time Allowed: 90 Minutes Negative Marking: Yes Type of Questions: Objective Type (Multiple Choice) Section (Network Filters and Transmission Lines) 1. Pick up wrong statement (a) A group of interconnected individual components known as circuit elements is called a network. (b) A humped network is an arrangement of physically separate resistors, inductors and capacitors. (c) Distributed network is one, which the resistive, inductive and capacitive effects are inseparable for network analyses. (d) A branch is a network having four elements.

2. Kirchoff’s laws for networks are: (a) The algebraic sum of branch currents meeting at any node is zero. (b) The algebric sum of voltage drops in any set of branches forming a closed circuit or loop must be equal to zero. (c) Both (a) and (b) (d) Neither (a) and (b)

3. Mutually coupled circuit is a circuit which is:

(a) Bilateral (b) Unilateral (c) None of these (d) Either (a) or (b)

4. Duality is a (a) Transformation in which current and voltages are interchanged (b) Active sources become passive sources (c) Passive sources become active sources (d) Both (b) and (c)

5. Combined inductance of two inductors L1 and L2 connected and voltages are interchanged (a) L1 + L2 (b) (L1 + L2)/ L1 (c) (L1 + L2) / (L1 X L2) (d) (L1 X L2) / (L1 + L2)

6. Normal analysis techniques are based on (a) Thevenin’s theorem (b) Tellegan’s theorem (c) Superposition theorem (d) Kirchoff’s Law

7. Two voltage sources can be connected in parallel when they are equal in (a) Magnitude (b) Frequency (c) Phase

(d) All the above

8. The kirchoff’s law fail in (a) Linear circuits (b) Non-linear circuits (c) Lumped parameter circuits (d) Distributed parameter circuits

9. Which of the following is a nonreciprocal network ? (a) A network consisting of all resistances (b) A network consisting of all capacitances (c) A network consisting of all inductances (d) A transistor model

10. When two systems obey equations of the same form the systems are said to be (a) Similar system (b) Identical system (c) Analogous system (d) Digital system

11. For a highly selective circuit (a) It must have large value of Q (b) It must have high value of capacitance to produce resonance at fixed frequency (c) Either (a) or (b) (d) Neither (a) nor (b)

12. A network consisting of four terminals is called a

(a) One port network (b) Two port network (c) Four port network (d) None of the above

13. Driving point of a network is (a) A port where voltage or current source is connected (b) A terminal where load is connected (c) A port where load is connected (d) None of the above

14. Ceramic filters are similar in construction to (a) Crystal filters (b) Crystal ladder filters (c) Crystal lattice (d) Mechanical filters

15. When two port networks are connected in parallel the resultant (a) Z parameters are the some of individual parameters (b) Y- parameters are the some of individual parameters (c) Both (a) and (b) (d) Neither (a) nor (b)

16. Electric wave filters (a) Allow electric signals with specified frequency range (b) Suppress signals outside a specified range (c) Both (a) and (b) occurs simultaneously

(d) Either (a) or (b) occur at a time

17. A cascade connection of low pass filter and high pass filter is called (a) Band pass filter (b) Band elimination filter (c) Neither (a) nor (b) (d) Both (a) and (b)

18. The response of a network is decided by the location of (a) Its poles (b) Its zeros (c) Either (a) nor (b) (d) Both (a) and (b)

19. Example of two port network is (a) Transformer (b) Transmission line (c) Bridge circuit and transistor circuit (d) All of the above

20. The circuit whose...
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