WorksheetsElectric iron installation maintenance and repair 10th
Total questions: 38
Worksheet time: 24mins
What is the purpose of preparing necessary tools, materials, and equipment before electronic work?
To increase costs
To ensure safety and efficiency
To save time
To avoid maintenance
What does the soleplate of an electric flat iron do?
Insulate the heating element
Carry and control the iron
Indicate electricity flow
Heat up to press fabric
What is the purpose of a thermal fuse in an electric flat iron?
To heat up the soleplate
To provide electricity
To cut off the circuit in case of overheating
To control the temperature
Which part of the flat iron is responsible for removing wrinkles from fabric?
Heating Element
Selector Switch
Soleplate
Handle
What does the neon/pilot lamp indicate?
The temperature setting
That the iron is plugged in
The fabric type
The power source
Which part of the flat iron serves as a base for fabric pressing?
Handle
Body/Case
Heating Element
Soleplate
Which of the following is NOT TRUE about feature of a modern electric flat iron?
thermostat to ensure maintenance of constant temperature
electrical cord with heat resistant
temperature control dial
all irons with steam features
What does the selector switch on an electric flat iron do?
Control the temperature
Turn the iron on and off
Adjust the weight of the ironing plate
Heat up the soleplate
What is the purpose of the AC line cord in an electric flat iron?
To cut off electricity
To serve as a base for fabric pressing
To connect the unit to a power source
To regulate the temperature
In an electric flat iron, what is the purpose of the handle?
To regulate the temperature
To cut off electricity
To carry and control the iron
To provide power
Which part of the flat iron is insulated from the body and heats up the soleplate?
Handle
Heating Element
Selector Switch
Thermal Fuse
What does the steam feature in a modern electric flat iron do?
Adjust the weight of the ironing plate
Provide power to the heating element
Add moisture to help remove wrinkles
Regulate the temperature
Which part of the flat iron protects the internal components and shields the user from heat?
Handle
Selector Switch
Body/Case
Neon/Pilot Lamp
What is the purpose of the electronic control in modern electric flat irons?
Regulate the temperature
Cut off power automatically
Control the weight of the ironing plate
Select fabric type
What effect does resistance have in the heating element of an electric flat iron?
It cools the wire
It increases efficiency
It generates heat
It causes combustion
Why is electric heating considered safe in comparison to other methods?
It doesn't involve combustion
It has lower efficiency
It requires manual temperature control
It is noisy
What type of cord should be used with a 220V iron if an extension cord is necessary?
10A cord
16A cord
5A cord
30A cord
What is the efficiency of resistance heaters in converting electric energy into heat?
50%
75%
100%
25%
How does a thermal fuse protect an electric flat iron?
By heating up the soleplate
By regulating the temperature
By cutting off the circuit during overheating
By indicating power flow
What is the purpose of a mica insulator in the flat iron?
To generate heat
To protect the user from burns
To insulate the heating element from the body
To indicate power flow
This procedure in Pre-Testing and Troubleshooting requires simple inspection by merely looking for burned, dented or dislocated parts.
Operate the device
Perform visual inspection of the unit
Test the unit for continuity using VOM
Determine the specific problem by asking the symptom
What is the first step in receiving electronically controlled domestic appliance.
Conduct interview.
Make an initial inspection.
Confirm the problem/complain.
Accomplish receiving and repair form.
The work done in moving the charge Q through a potential difference V
Q/V
V/Q
QV
1/QV
The amount of heat H produced in time t is
VIt
1/VIt
VI
QV
If resistance increases in the circuit then the heat energy ______________
increases
decreases
no change
all the above
The electric heating is used in
Fuse
Light
heater
All of the above
The rate at which electric energy is dissipated or consumed in an electric circuit is caleed
Electric Potential
Electric Resistance
Electric Power
Electric Energy
The commercial unit of electric energy is
Kilowatt hour
Watt
Joule
Kilowatt
Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Equal to the magnetic field
n the same direction as the magnetic field
Refer the diagram. The right face of the loop acts as North pole and left side of loop acts as south pole
False
True
Who was the first to observe the magnetic effect of electric current?
Faraday
Oersted
Volta
Ampere
Magnetic field inside a long solenoid carrying current is
same at all points (uniform)
different at poles and at the centre
zero
different at all points
No two field-lines are found to cross each other.
true
false
An Electric charge in a uniform motion produces
An Electric Field only
An Magnetic field only
Both Electric Field & Magnetic field
Neither of them
In an electric motor, the direction of current in the coil changes once in each:
One-fourth rotation
Half rotation
One rotation
Doesn't change
Identify the poles of the magnet in the given figure.
NORTH
SOUTH
One is north and the other is south
Can't predict
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid will
Increase
Decrease
Remains same
Becomes zero
Which of the following is not the source of magnetic field:
Moving charge
Electric current
Magnet
A small piece of iron
