Which type of lamp holder from the following is fitted directly on the wooden board?
1). Pendant holder
2). Angle holder
3). Bracket holder
4). Batten holder
Batten Holder: This type of lamp holder is fitted directly on the wooden board, which itself is fixed on the wall. The lamp is then supported in the batten holder.
Pendant Holder: When the bulb is to be suspended from the ceiling rose, this type of holder has to be used for holding the lamp.
Angle Holder: Angle holders are used when the light of the lamp is needed at a certain angle. These are directly fixed to the walls.
Bracket Holders: These are used where direct light is needed in the room. These are also used on table lamps. Brackets used with such type of holders are made of brass material.
WaterTight Bracket Holder: These are provided with tubular glasses with watertight covers. These are mainly used for street lighting. They are also used for supporting bulbs outside the house premises.1. To prevent the generation of static charges on rubber or flat leather
2. Which of the following devices may be used to provide protection against lightening over voltages ?
4. Which of the following losses is not dissipated by the stator core surface in a synchronous motor ?
6. The electrical power to a meggar is provided by
7. The tiny block formed by the arrangement of a small group of atoms is called the
9. Which of the following is a digital modulation technique?
10. The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?