CDC Electrical Systems Practice Test Questions (5 Level) Questions And Answers With Latest Updates

What does increasing the use of solid-state switching devices contribute to current waveforms? a.A regulated voltage waveform also known as a uni-sinusoidal waveform b.A distorted voltage waveform also known as a bi-sinusoidal waveform c.A distorted voltage waveform also known as a non-sinusoidal waveform d.A regulated voltage waveform also known as a non-sinusoidal waveform - Answer-C Why is the substitution of defective foreign parts or materials for US standard parts a good strategy? a.Repair is always guaranteed using substitute parts and materials b.Repairs might be completed more efficiently by modifying the original system c.None of the above d.Repair is always faster when using US standard parts as substitute - Answer-B What is the purpose of lockout/tagout? a.Make work easier b.Comply with OSHA standards c.Prevent hazardous energy sources from harming or killing the bystanders and supervisors d.Prevent hazardous energy sources from harming or killing the worker - Answer-D When performing a safe clearance, how are all sources of electrical energy verified to be disconnected or otherwise prevented from energizing the equipment or circuits being worked on? a.By a qualified person operating the controls or otherwise verifying that the equipment cannot be restartedb.By a qualified person that used test equipment to test the circuit elements and electrical parts of equipment to which employees will be exposed and verifying that the circuit elements and equipment part - Answer-D Which of the following best describes a harmonic? a.A current of the fundamental frequency of the system b.A resistance at a multiple of the fundamental frequency of the system c.A voltage or current at a multiple of the fundamental frequency of the system d.A voltage of the fundamental frequency of the system - Answer-C