This set of Audio Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Intermittent Faults and Troubleshooting”.
1. When the complexity of the system increases, chances of presence of intermittent fault increases.
a) True
b) False
View Answer
Explanation: Intermittent means starting and stopping at irregular intervals. Hence intermittent faults are those that occur suddenly and are difficult to identify. When complexity of a system increases, chances of presence of intermittent faults increase.
2. In which test the power of supply unit is kept switched off and the resistance at the divergent point is measured in power supply unit in troubleshooting of power supply unit?
a) Continuity
b) Impedance
c) Hot
d) Cold
View Answer
Explanation: In the cold test the power of supply unit is kept switched off and the resistance at the divergent point (common supply point) is measured. If the resistance is zero (short) the fault is either in the supply line of any of the stages being fed by power supply unit or in the supply unit itself.
3. Which test is conducted by keeping the power supply ON in power supply unit in troubleshooting of power supply unit?
a) Cold
b) Hot
c) Continuity
d) Impedance
View Answer
Explanation: Hot test is conducted by keeping the power supply ON. The DC output at the output terminal can be normal, high or low. If it is normal, then the supply is alright, else there is a fault and the component responsible should be identified.
4. In isolation technique each stage is isolated from the end point on by one in troubleshooting of power supply unit.
a) True
b) False
View Answer
Explanation: The above statement is false. In isolation technique each stage is isolated from the common point on by one. When the isolation of a stage removes the fault, that particular stage can be considered as a faulty stage and further inspection can be made to find out the faulty component for the short.
Sanfoundry Global Education & Learning Series – Audio Video Engineering.
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