Worksheetsdc generator
Total questions: 23
Worksheet time: 12mins
What is a DC generator?
A device that converts electrical energy into mechanical energy by the principle of electromagnetic induction
A device that converts mechanical energy into electrical energy by the principle of electromagnetic induction
A device that converts mechanical energy into electrical energy by the principle of electromagnetic attraction
A device that converts electrical energy into mechanical energy by the principle of electromagnetic attraction
Which of the following is not a component of a DC generator?
Rotor
Armature
Field coils
Stator
What is the purpose of the commutator in a DC generator?
To regulate the output voltage
To convert mechanical energy to electrical energy
To provide mechanical rotation
To convert AC output to DC
What is the role of the field coils in a DC generator?
To convert mechanical energy to electrical energy
To provide mechanical rotation
To regulate the output voltage
To produce a magnetic field
Which type of DC generator is commonly used in automobiles?
Compound-wound generator
Shunt-wound generator
Permanent magnet generator
Series-wound generator
What can cause a DC generator to fail?
Improper maintenance
Overloading
All of the above
Excessive heat
What is the efficiency of a DC generator?
Ratio of mechanical power output to electrical power input
Ratio of electrical power output to electrical power input
Ratio of mechanical power output to mechanical power input
Ratio of electrical power output to mechanical power input
What is the purpose of the brushes in a DC generator?
To convert mechanical energy to electrical energy
To regulate the output voltage
To provide mechanical rotation
To transfer electrical energy from the armature to the external circuit
Which of the following is a disadvantage of a DC generator?
Requires periodic maintenance
Efficiency is independent of load
Easy to control the output voltage
Produces a constant output voltage
What is the main advantage of a DC generator over an AC generator?
Produces a smoother output voltage
Lower cost
Higher efficiency
Ability to generate electrical energy at any desired voltage
Which type of earthing is used in sandy area?
Plate earthing
Rod earthing
Pipe earthing
Strip earthing
What is the color code of earth wire?
Red
Black
Blue
Green
Earth wire is connected to which part in the switchboard?
Socket
Indicator
Switch
What is used for lower earth resistance?
Moisture area
Strip earthing
Rocky area
Rod earthing
What equipment is used for earth test?
Fuse
MCCB
MCB
Is a fuse always inserted in the earth wire?
False
True
Does earthing save human beings from electric shock?
True
False
Does earthing protect electric equipment?
True
False
For the protection of electric short circuit, which device is used?
Fuse
MCCB
MCB
Which current gives shock?
AC
DC
MATCH THE FOLLOWING
Moisture area
Strip earthing
Rod earthing
Rocky area
