Trade Theory Quiz

Trade Theory

• AC drives are better for high-speed operation because they don't use brushes and commutation.
• Positive feedback is essential for oscillations in oscillator circuits.
• Voltage divider networks are used in automatic voltage stabilizers.
• A megger is used for measuring insulation resistance in 3-phase induction motors.
• Series field tapping method is used in food mixer motors' speed control.
• Miniature circuit breakers protect panel boards from overload and short circuits.
• Sensors are avoided in panel board assemblies.
• An external growler is used to test armature windings for short and open circuits.
• A growler is a type of instrument to test armature windings.
• Silicon is used in solar cells.
• La = (V - Eb) / Ra is the formula for calculating current taken by a DC shunt motor armature.
• DC 3-wire system is indicated by the red, blue, and black colored conductors.
• Televisions use automatic stepped voltage stabilizers.
• Rolling machines in industries often use multi-motor electric drives.
• A multimeter is used to check short circuit faults in electronic circuits in voltage stabilizers.
• PVC covered copper wire is used for rewinding submersible pumps.
• AC drives are commonly used in process plants due to their maintenance-free and long lifespan.
• LC filters are used to remove voltage spikes in rectifier circuits.
• LCDs on basic operator panels of DC drives show monitored parameters.
• IGBTs act as DC bus switching devices in VF drives.
• Thermal power generation is a conventional form of power generation.
• Boron is used to make p-type semiconductors.
• ACSR stands for Aluminum Conductor Steel Reinforced.

Electrician 2nd Year Modal Paper-1 - Page 2

• Fleming's right-hand rule determines current direction in DC motors.
• Fleming's right-hand rule is also used for finding magnetic field direction.
• Electro-chemical equivalent is the mass of a liberated substance from an electrolyte by one coulomb of electricity.
• Slip controllers are used for eddy current drives.
• Damper windings in synchronous motors provide a high initial magnetic field for maintaining consistent speed at startup.
• Synchronous motors act as power factor correctors by varying their field excitation.
• Oscillator circuits generate AC signals without an input signal.
• Inverters are used to convert DC to AC.
• Electroplating applications require only DC.
• Calculating pitch factor (Kp) involves winding and stator slot and pole details.
• Slot distance calculation for ceiling fans depends on slot, pole, and coil counts.
• Synchronous speed of a 3-phase induction motor with 6 poles and 50 Hz is 1000 rpm.
• Alternators with 6 poles running at 1000 rpm have a 50 Hz supply frequency.
• Alternators with 4 poles and a 50 Hz supply frequency operate at 1500 rpm
• Pitch factor calculation uses winding and pole pitch.
• DC series motors provide constant speed drives.
• Parallel paths in duplex lap windings of a 4-pole DC motor are 2.
• Parallel paths in duplex lap windings of a 4-pole DC generator are 8.

Electrician 2nd Year Modal Paper-1 - Page 3

• Resistors in 4-point starters limit current in NVC.
• Dynamic balancing is a method for balancing armatures.
• Oscilloscopes (CROs) measure frequency.
• Cyclo converters are frequency converters.
• Selling price (S.P.) is an expanded form.
• Lubricants reduce friction in machine parts.
• Profit/gain is expressed in percentage.
• A thermostatic switch regulates heat in an automatic iron.
• Porcelain clay is used for line insulators.
• Technology advances lead to changes in work processes.
• Email and internet connection are essential in modern communication.
• Skills and self-belief contribute to career growth and sustainability.
• Misunderstandings arise from poor communication.
• Input/output devices (excluding keyboards) are being discussed.
• Keeping a balance between mental and physical activities, such as hobbies, is important.
• Speakers' notes provide presenters with information they might want to cover in their presentation.

Electrician 2nd Year Modal Paper-1 - Page 4

• Senior female employee presides over the ICC within an organization.
• Effective networking requires consistent contact with your contacts.
• Sustainable business practices avoid negatively impacting the environment and community.
• Respect should be shown while speaking at workplaces.
• Emojis can substitute for insufficient verbal communication.
• MS Power Point is a computer presentation software program.
• Technology has significantly transformed workplaces.
• Nonverbal communication includes gestures, facial expressions, and eye contact.
• Basic computer requirements for IT work exist.
• PowerPoint presentations should keep information short and simple (KISS).
• Effective communication involves attentive listening and clear speaking.
• Area houses' pricing is related to area location and construction.
• Merchants profit calculation is given.
• Rainwater harvesting helps prevent water shortages.
• "Good condition" describes road quality.
• Business cards help provide appropriate business information.