NTDC SUB Station Operator Past Paper | 2024

When does the treaty of Hudaibiya take place?

1. 6th Hijri
2. 7th hjri
3. 8th hijri
4. 9 hijri

The transportation delay in a distribution system causes reduced stability because it produces :

1. Transient
2. Alternator
3. Phase Lag
4. Both B and C

The output of a half-wave rectifier is suitable only for :

1. Charging batteries
2. Running car radios
3. Running AC motors
4. Running tape-recorders

What was the old name of Faisalabad?

1. Neroon Kot
2. Khan Garh
3. Raj Shahi
4. Lyallpur

UJT has ____ Junctions?

1. One
2. Two
3. Three
4. Four

DIAC is :

1. A DC switch
2. An AC switch
3. A temperature sensor
4. A voltage regulator

SCR is a ____ layer device.

1. Three
2. Four
3. Five
4. Two

Which gate represents a series gate?

1. OR
2. AND
3. NOR
4. XOR

The output of an XNOR gate will be high when :

1. The input logic levels are different
2. All inputs are low
3. Any input is high
4. The input logic levels are the same

Which of the following cannot be connected in parallel because KVL (Kirchhoff's Voltage Law) is not valid?

1. Capacitors
2. Inductors
3. Resistors
4. Batteries with different EMF