AP ECET EEE 2020-8

1. Which one of the following factor effects specific energy consumption of a train?

A. Gradient
B. distance between stops
C. minimum speed
D. maximum speed

Answer : D. maximum speed
Explanation:-

2. ______ wiring system provides best protection against fire

A. wooden casing
B. cleat wiring
C. metal conduit wiring
D. capping wiring

Answer : C. metal conduit wiring
Explanation:-

3. _______ wiring is recommended only for temporary installations

A. cleat
B. CTS/RTS
C. Metal
D. PVC Capping

Answer : A. cleat
Explanation:-

4. which of the following is least preferred for earthing

A. Clayey soil
B. Dry earth
C. wet mashy earth
D. earth mixed with salt

Answer : A. Clayey soil
Explanation:-

5. what should be the value of earthing resistance for large power stations?

A. 1 ohm
B. 0.5 ohm
C. 2 ohm
D. 5 ohm

Answer : B. 0.5 ohm
Explanation:-

6. In a break down region, a zener diode behaves like a ______ source

A. Constant current
B. constant voltage
C. constant resistance
D. constant capacitance

Answer : B. constant voltage
Explanation:-

7. For a half or full wave rectifier, the peak inverse voltage is always

A. Greater than the input voltage
B. Equal to the inout voltage
C. smaller than the inout voltage
D. greater than the inout voltage for full wave rectfier and smaller for half wave rectifier

Answer : C. smaller than the inout voltage
Explanation:-

8. An LED and phototransistor is equivalent to a/an

A. Optocoupler
B. FET
C. Regulator
D. Thermocouple

Answer : A. Optocoupler
Explanation:-

9. The unwanted characteristics of amplifier output apart from the desired output is collectively termed as ______

A. Inefficiency
B. Damage
C. Fault
D. Distortion

Answer : D. Distortion
Explanation:-

10. If the cascaded amplifier have gains 10,20,30 the overall gain will be

A. 60
B. 6000
C. 600
D. 6

Answer : B. 6000
Explanation:-