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WorksheetsELECTRO 1
Total questions: 30
Worksheet time: 3600secs
Which of the following is an insulator?
rubber eraser
aluminum foil
paper clip
iron bar
Which of the following material is referred to as a medium whereby electrons can move easily from atom to atom?
dielectric
insulator
mica
conductor
What is the unit of charge?
Volt
Coulomb
Ohm
Ampere
Number of cells connected in series provide a _____.
High current carrying capacity
Higher Voltage
Higher power
None of the choices
The capacity of a battery is expressed in terms of ____.
Current rating
Voltage rating
Ampere hour rating
None of the choices
What is the output voltage of a five 2 V cell that are connected in parallel?
1 V
2 V
4 V
10 V
What would happen if in a circuit the voltage is increase?
The current would decrease
The current would increase
The current stays the same
The circuit will explode
What is the resistance of a coil which draws a current of 50mA from a 120V supply?
240 ohms
2400 ohms
24 ohms
2.4 ohms
What is the resistance of an open fuse circuit?
at least 1000 ohms
infinity
zero
100 ohms at standard temperature
Watt is equal to one_____.
joule per second
meter per second
ampere per second
farad per second
Which of the following is NOT a type of resistor circuit?
Series circuit
Parallel circuit
Inverse series- parallel circuit
Combined series-parallel circuit
The color band scheme for a resistor with a 5-color band is Brown, Black, Black, Red, and Gold. What is the value of the resistor
100 ohms
1 kilo ohms
100 kilo ohms
10 kilo ohms
A 10 kilo ohm-resistor has a tolerance range of 10%. What is the possible range of resistance offered by the resistor?
9 kilo ohms to 11 kilo ohms
9.9 kilo ohms to 11 kilo ohms
9 kilo ohms to 10.9 kilo ohms
9 kilo ohms to 10 kilo ohms
What is a 3 terminal variable resistor in which the resistance is manually varied to control the flow of electric current?
Thermometer
Potentiometer
Multimeter
Thermostat
What is the electrical energy of a 750 W waffle iron that is used for 15 minutes?
0.1875 kWh
11.25 kWh
11,250 kWh
50 kWh
What is the power rating of a space heater that uses 1.2kWh of energy in 45 minutes?
0.026 kW
0.90 kW
1.6 kW
54 kW
If the resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is
120 W
125 W
130 W
200 W
If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is
60 W
80 W
100 W
120 W
How much current is passing through a wire if 10C of charge is travelling for 50ms?
0.5A
20A
50A
200A
In what time would a current of 1A transfer a charge of 30C?
0.3s
3s
30s
300s
Which of the following is NOT a Safety Practice onboard ships?
If any sparks are noticed, be sure not to ignore them.
Never leave the marine wiring having loose connections or joints without proper insulation.
When carrying out maintenance or repair on any equipment, power from the main electrical panel may be switched off or not.
Wear proper protective gear when working with electrical machineries and follow all instructions.
Which of the following is NOT a purpose of Material Safety Data Sheet (MSDS)?
to identify the dangerous goods content of what is being shipped,
to determine how to handle, store and transport the goods
what to do if the package is compromised as a result of accident/mishandling
to disregard what emergency and first aid measures to be applied
An electrical device that measures voltage, current, resistance and continuity is called?
Multimeter
Tachometer
Voltmeter
Ammeter
Which of the following is a function of a Circuit Breaker?
power factor correcting device
a device to neutralize the effect of transients
a waveform correcting device
a current interrupting device
A fuel cells converts .........energy into electrical energy.
Mechanical
Magnetic
Solar
Chemical
Three resistors of 10, 15 and 20 ohms each are connected in parallel. What is the equivalent resistance?
4.62 ohms
45 ohms
17.2 ohms
0.22 ohms
Two (2) 115-V incandescent lamps A and B are connected in series across a 230-V source. If lamp A is rated 75 watts and lamp B is rated 50 watts, determine the current drawn by the series connection.
0.54 A
0.64A
0.57A
0.48A
Two 10-Ω resistances are connected in parallel. The two are then connected in series with a 5-Ω resistance. It is then connected across a 24-volt battery; find the voltage across the 5-Ω resistor.
9V
12V
15V
24V
Which of the following is true about Kirchoffs Voltage Law?
difference of voltages in more than one loop must be zero
sum of all voltages in one loop must be equal to zero
power in one loop should be zero
Voltage drops must be eliminated in one loop
Which of the following is NOT a Safety Control Measures at the organizational level?
Ensure appropriate supervision is provided;
Put in place safe operating processes and procedures;
Carrying out risk assessments for all electrical work is just an option
Adequate maintenance, including inspection and testing
