AP ECET EEE 2019-8

1. Flat rate tariff can be charged on the basis of______

A. Connected load
B. units consumed
C. maximum demand
D. minimum demand

Answer : units consumed
Explanation:-

2. For an SCR, dv/dt protection is achieved through the use of_________

A. R-L in series with SCR
B. R-C across SCR
C. L in series with SCR
D. R-C in series with SCR

Answer : R-C across SCR
Explanation:-

3. Distributed winding is preferred over concentrated winding as it________

A. reduces noise
B. reduces the machine size
C. reduces the amount of copper required
D. improves the generated emf waveform and adds rigidity and mechanical strength to the winding

Answer : improves the generated emf waveform and adds rigidity and mechanical strength to the winding
Explanation:-

4. The cheapest system of internal wiring is______________wiring

A. cleat
B. casing-capping
C. CTS or TRS
D. conduit

Answer : cleat
Explanation:-

5. The principle of operation of an LVDT is based on variation of________________

A. Self-inductance
B. Mutual inductance
C. Reluctance
D. permeance

Answer : Mutual inductance
Explanation:-

6. The direction of rotation of a DC motor can be determined by___________

A. Fleming's Right hand rule
B. Fleming's Left hand rule
C. Lenz's law
D. Ampere law

Answer : Fleming's Left hand rule
Explanation:-

7. Hollow conductor's are used in transmission lines to

A. reduce weight of copper
B. improve stability
C. reduce corona
D. increases Power transmission capacity

Answer : reduce corona
Explanation:-

8. The Barkhausen criterion for sustained oscillation is given by

A. Aß=1
B. |Aß|>=1
C. |Aß|
D. LAß=180°

Answer : Aß=1
Explanation:-

9. For a junction FET in the pinch off region, as the drain voltage is increased, the drain current

A. becomes zero
B. abruptly decreases
C. abruptly increases
D. remains constant

Answer : remains constant
Explanation:-

10. A series RLC circuit will have unity power factor of operated at a frequency of

A. 1/LC
B. 1/w√LC
C. 1/w^2 LC
D. 1/2π√LC

Answer : 1/2π√LC
Explanation:- A series RLC Circuit will have unity power factor at a resonant frequency
Resonant Frequency = 1/2π√LC