Deepakkumar Yadav
Safety Signs and Symbols State four safety signs and symbols used in industry. Safety signs and symbols : The requirement of safety signs are as below : It should be illustrative i.e. the person must understand its meaning easily. It should convey the instruction easily. It should be Photographically so that it is easily understood … Read more
Equipment Used for Lifting Heavy Electrical Machines During Installation Q. List out the tools required for loading and unloading the heavy equipments. Also state the use. OR State any four equipments used for lifting heavy electrical machines during installation. Flexible hoisting devices-Chain and Ropes. Pulleys, pulley system, sprockets and drums. Load handling, attachment, accessories etc. … Read more
Common Trouble in Electrical Installation Q. List the common trouble in electrical installation. Foundation not strong. Foundation structure, nut-bolt not aligned properly. Concrete foundation if not cured for a period of time may create problems. There may not be sufficient space for foundation or around foundation to fix accessories. Sufficient space around the installation may … Read more
Silvester’s Method of Providing Artificial Respiration Q. Explain silvester’s method of providing artificial respiration. silvester’s method (Arm-lift-chest-pressure method) This method is illustrated in above Figure The patient is laid on his back. His arms are grasped above the wrists and drawn first upward and then above the head until they touch the floor. Then they are … Read more
Factors Involved in Designing the Machine Foundation Q. Explain the factors involved in designing the machine foundation. The machine foundation should satisfy the following requirements : The foundation should be horizontal in level. The foundation must be rigid. It should be free from vibrations. It should transmit both static and dynamic weight of the machine … Read more
Precaution Every House Holder Should Take While Working On/operating Electrical Appliances Q. What precaution every house holder should take while working on/operating electrical appliances ? Get checked the house wiring, fitting by qualified electrician periodically once in a year. From the electrician get checked : Soundness of insulation of wiring work. (i) Soundness of earthing. … Read more
Causes of Failure of Underground Cables Q. What are the causes of failure of underground cables ? 1. Mechanical Failure : The various Layers like sheath, conductor, Insulation a be injured. Due to injuries the cable may fail to work. Causes may be due to (A) Accidents (B) Carelessness … Read more
External Causes of Failure and Abnormal Operation of Equipments Q. What are the external causes of failure and abnormal operation of equipments. External Causes : A 3 – phase machine is supplied with 3-line wires L1 L2 L3. These are called as lines. If the fault is developed in the feeder / Distributor line only two lines will … Read more
Reasons for Developing Electrical and Magnetic Fault Q. Give the reasons for developing electrical and magnetic fault. Electrical Faults : Sr. No. Fault Reasons Remedial measures 1 Wrong electric connections Field winding connections may be wrong. Field-Armature winding connections might be wrong. 3-phase motor phase sequence connection R-Y-B may be wrong. Check the connection. Check … Read more
External Causes of Failure of Equipment Q. State external causes of failure of equipment. These causes are external to the machine from supply to the terminal box of the machine. A 3 – phase machine is supplied with 3-line wires L1, L2, L3. These are called as lines. If the fault is developed in the … Read more