Quiz about 2365 Level 2 Electrical, Unit 202

Question 1

Work done is calculated by Multiplying......

Accepted Answer

Force x Distance

Answer

Distance x Time

Answer

Distance x Mass

Answer

Force x Velocity

Question 2

The SI unit for power is?

Accepted Answer

Watt

Answer

Volt

Answer

Ohm

Answer

Amp

Question 3

Electric current is the movement of?

Accepted Answer

Electrons

Answer

Atoms

Answer

Neutrons

Answer

Protons

Question 4

What one of the following is used to determine the resistance in an electrical circuit?

Accepted Answer

Volts / Amps

Answer

Amps / Watts

Answer

Volts x Amps

Answer

Watts x Amps

Question 5

An electric motor supplies 4kw of power when operating at an efficiency of 80%. How much power does the motor itself intake

Accepted Answer

5kw

Answer

3.2kw

Answer

20kw

Answer

80kw

Question 6

Which of the following does NOT conduct electricity?

Accepted Answer

PVC

Answer

Brass

Answer

Aluminium

Answer

Copper

Question 7

A typical insulator for an 11kv overhead line would be?

Accepted Answer

Glass

Answer

Rubber

Answer

Mica

Answer

Oil

Question 8

Conducting materials contain electrons which are......

Accepted Answer

Freely displaced

Answer

Tightly healed together

Answer

Positively charged

Answer

Collected from the atmosphere

Question 9

The electrical energy supplied by a lead acid battery is produced by a?

Accepted Answer

Chemical action

Answer

Magnetic action

Answer

Thermal action

Answer

Mechanical action

Question 10

which of the following has the lowest resistivity?

Accepted Answer

Copper

Answer

Aluminium

Answer

Steel

Answer

Lead

Question 11

Insulation material found in MICC is?

Accepted Answer

Magnesium oxide

Answer

Manganese Oxide

Answer

Magnesium dioxide

Answer

Manganese dioxide

Question 12

When the resistance of an electrical circuit is increased, the.......

Accepted Answer

current is reduced

Answer

Power will increase

Answer

current will increase

Answer

current and power stay the same

Question 13

A resistive load in a circuit converts electrical energy into?

Accepted Answer

Heat

Answer

Mechanical force

Answer

Pressure

Answer

Kinetic

Question 14

The relationship between the mass of a body (M), the applied force to the body (f) and the acceleration of the body (a) is given by the formula?

Accepted Answer

Force = mass x acceleration

Answer

Mass = force x acceleration

Answer

acceleration = mass x force

Answer

acceleration = mass / force

Question 15

The SI unit of time in the second. Express 0.00001 seconds in a suitable sub multiple:

Accepted Answer

10 microseconds

Answer

10 milli seconds

Answer

100 milli seconds

Answer

100 microseconds

Question 16

In a magnetic circuit the magnetic field strength (H) is expressed in ampere turns/Meter. H is calculated using the formula?

Accepted Answer

H = NI/L

Answer

H = I/NL

Answer

H = IL/N

Answer

H=NL/I

Question 17

The formula used to calculate the resiustance of a conductor given, Length (L), Cross sectional area (A), Resistivity (P)

Accepted Answer

R = pl/a

Answer

R = a/pl

Answer

R = pa/l

Answer

R = al/p

Question 18

If the input energy and output energy of a machine are known, the percentage efficiency of the machine is calculated using the formula?

Accepted Answer

output/input x100

Answer

input/output x 100

Answer

output x imput / 100

Answer

input x output / 100

Question 19

Electric current is the flow of negatively charged particles called?

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Answer

atoms

Question 20

Good insulating materials are materials which have an atomic structure with.....

Accepted Answer

a few free electrons

Answer

many free electrons

Answer

many free protons

Answer

few free protons

Question 21

Given the formula Force = mass x acceleration. a object is accelerated at 2m/2sec when a force of 10 newtons is applied, calculate the mass of the object.

Accepted Answer

5kg

Answer

2kg

Answer

10kg

Answer

20kg

Question 22

A d.c machine pas a power output of 1200w. the imput current is 4A and the applied voltage is 375v. what is the efficiency of the machine?

Accepted Answer

80%

Answer

50%

Answer

85%

Answer

90%

Question 23

Two resistors of 20 and 40 ohms are connected in series across a 120v d.c supply, what is the current?

Accepted Answer

2A

Answer

0.5A

Answer

5A

Answer

20A

Question 24

What are the correct units for power, voltage and current?

Accepted Answer

Watt, volt, amp

Answer

joule, watt, amps

Answer

joule, volt, amp

Answer

watt, volt, tesla

Question 25

Using ohms law, esplain how we find voltage if we know current and resistance

Accepted Answer

V = I x R

Answer

V = I/R

Answer

V = I + R

Answer

V = I - R

Question 26

If a motor supplies 8kw of power when operasting at an efficiency of 80%, how much power does the motor itself take?

Accepted Answer

10kw

Answer

6.4kw

Answer

14.4kw

Answer

4.44kw

Question 27

What materials do NOT conduct electricity?

Accepted Answer

Ceramic

Answer

Copper

Answer

Brass

Answer

Silver

Question 28

What voltage is used in the trasnmition of electrical energy via the national grid

Accepted Answer

400kv

Answer

132kv

Answer

275kv

Answer

11kv

Question 29

If 10m of cable is 5 ohms, what is the resistance 80m?

Accepted Answer

40 ohms

Answer

50 ohms

Answer

80 ohms

Question 30

The formula of resistivity is?

Accepted Answer

p=RxA/L

Answer

R=LxA/p

Answer

L=RxAxp

Answer

RxA/pxL

Question 31

You have the following resistors not wired in series 0.23 0.54 0.42, Rt is?

Accepted Answer

0.11 ohms

Answer

0.53 ohms

Answer

8.5 ohms

Answer

2.11 ohms

Question 32

What is conventional flow?

Accepted Answer

Positive to Negative

Answer

Positive to Positive

Answer

Negative to Negative

Answer

Negative to Positive

Question 33

The image shown represents that of a

Accepted Answer

a Sinewave

Answer

an Cosine wave

Answer

a DC Voltage

Answer

a Complex waveform

Question 34

Given A = B + C, Make B the subject

Accepted Answer

B = a-c

Answer

B = c-a

Answer

B = a+c

Answer

B = a/c

Question 35

what is the si unit for weight?

Accepted Answer

newtons

Answer

mass

Answer

weight

Answer

kilograms

Question 36

What does A.C stand for?

Accepted Answer

Alternating Current

Answer

Alternating copper

Answer

ohms

Answer

A.C

Question 37

name all 3 effects on electrical current

Accepted Answer

thermal,chemical,magnetic

Answer

heat , chemical , attraction

Answer

temperature, chemical ,metallic

Answer

fire , chemical , magnets

Question 38

Increasing the length of a conductor will ....

Accepted Answer

Increase the resistance

Answer

Decrease the resistance

Answer

Double the resistance

Answer

Half the resistance

Question 39

What is shown in this image

Accepted Answer

Light Emitting Diode

Answer

Photodiode

Answer

Zender Diode

Answer

Diode

Question 40

What is shown in this image

Accepted Answer

Photodiode

Answer

Light Emitting Diode

Answer

Zender Diode

Answer

Diode

Question 41

What do all of these items have in common?

Accepted Answer

They are diodes

Answer

They are resistors

Answer

They produce light

Question 42

How are Voltmeters and ammeters connected?

Accepted Answer

Voltmeter = Parallel

Ammeter = Series

Answer

Voltmeter = Series

Ammeter = Parallel

Answer

Voltmeter = Parallel

Ammeter = Parallel

Answer

Voltmeter = Series

Ammeter = Series

Question 43

What is the formula used to calculate force (N)?

Accepted Answer

Mass x Gravity

Answer

Mass x weight

Answer

Mass / gravity

Answer

Weight x Gravity

Question 44

What is the Formula for work done?

Accepted Answer

Force x distance

Answer

Mass x Distance

Answer

force x gravity

Question 45

The Formula for Average power is?

Accepted Answer

Work done / Time

Answer

Force / work done

Answer

Work done x time

Answer

Force x work done

Question 46

If 10m of cable is 5 ohms, What would the resistance be if the cable was 80m

Accepted Answer

40 Ohms

Answer

50 ohms

Answer

80 Ohms

Answer

5 Ohms

Question 47

Which of the following electronic devices are suitable for detecting temperature change?

Accepted Answer

Thermistors

Answer

Variable resistor

Answer

Zener Diode

Answer

Triac

Question 48

What effort is required to lift the load

Accepted Answer

200N

Answer

50N

Answer

10N

2365 Level 2 Electrical, Unit 202

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