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Area 3 > Electrification > Flashcards

Electrification Flashcards

1
Q

it is an electrical property of the atomic particles of which matter consists

a. current
b. charge
c. voltage
d. resistance

A

b. charge

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2
Q

it is the energy required to move a unit charge through an element

a. current
b. charge
c. voltage
d. resistance

A

c. voltage

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3
Q

it is a current that remains constant with time

a. Amperes
b. Alternating current
c. Direct current
d. None of the above

A

c. Direct current

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4
Q

It is a circuit element with resistance approaching infinity

a. Short circuit
b. Open circuit
c.Electric circuit
d. None of the above

A

b. Open circuit

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5
Q

It is a circuit element with resistance approaching zero

a. Short circuit
c. Electric circuit
b. Open circuit
d. None of the above

A

a. Short Circuit

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6
Q

It is a type of circuit connection when all component need the same current but with a voltage rating less than the
source voltage.

a. Parallel
b. Series-parallel
C. series
d. Wye-delta

A

C. series

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7
Q

It is a type of circuit connection when all component need the same voltage but with a current rating less than the source current.

a. Parallel
b. Series-parallel
c. series
d. Wye-delta

A

a. Parallel

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8
Q

Which of the following is not true for series resistances

a. The current is the same in all resistances
b. Voltage drops can be different with unequal resistances
c. An open circuit in one resistance results in no current throught the entire series circuits
d. None of the above

A

d. None of the above

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9
Q

Which of the following is not true for parallel resistances
a. The voltage is the same across all resistances
b. Series-parallel
c. An open circuit in one branch does not open the other
d. None of the above

A

d. None of the above

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10
Q

It is the ability of an element to conduct electric current

a. resistance
c. inductance
b. conductance
d. None of the above

A

b. conductance

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11
Q

It is an electrical element which consists of two conducting plates separated by an insulator (or dielectric)

a. capacitance
b. capacitor
c. Farads
d. None of the above

A

b. capacitor

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12
Q

It is the ratio of the charge on one plate of a capacitor to the voltage difference between the two plates

a. capacitance
b. capacitor
c. Farads
d. None of the above

A

a. capacitance

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13
Q

It is an electrical element which consists of a coil of conducting wire

a. inductance
b. inductor
c. Henry
d. None of the above

A

b. inductor

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14
Q

It is an electrical instrument for measuring electrical current

a. ammeter
b. AC clamp on meter
c. Multitester
d. All of the above

A

d. All of the above

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15
Q

It is the property whereby an inductor exhibits opposition to the change of current flowing through it

a. inductance
b. inductor
c. Henry
d. None of the above

A

a. inductance

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16
Q

Which of the following quantity the multitester cannot measure?

a. AC Voltage
c. AC current
b. DC Voltage
d. DC current

A

c. AC current

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17
Q

A multitester is capable of measuring

a. current
c. resistance
b. voltage
d. All of the above

A

d. All of the above

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18
Q

A clamp meter can measure

a. AC current
b. DC current
c. Both AC and DC
d. None of the above

A

c. both AC and DC

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19
Q

In multitester reading, when measuring an unknown range of voltage or current in a circuit, always start with

a. the lowest range of the meter
b. the mid-range of the meter
c. Whichever range
d. the highest range of meter

A

d. the highest range of meter

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20
Q

In a simple circuit, when measuring the voltage across a load by a multitester, the probe should be connected in with the load

a. Series
b. Parallel
c. Series-parallel
d. Wye-delta

A

b. Parallel

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20
Q

In a simple circuit, when measuring the current in the line by a multitester, the probe should be connected in

a. Series
b. Parallel with the line
c. Series-parallel
d. Wye-delta

A

a. Series

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21
Q

It is an electrical instrument that measures electrical power

a. Multitester
b. Power factor meter
c. Kilowatt hour meter
d. Wattmeter

A

d. Wattmeter

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22
Q

It is an electrical instrument that records the electrical energy consumption of an electrical equipment.

a. Multitester
b. Power factor meter
c. Kilowatt hour meter
d. Wattmeter

A

c. Kilowatt hour meter

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23
Q

A watt-hour meter is used by a utility company to determine the electric bill. It records

a. Electric power consumption
c. Electric energy consumption
b. Voltage consumption
d. Current consumption

A

c. Electric energy consumption

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24
Q

It is an instrument for measuring high AC current

a. AC clamp on meter
c. Instrument Current Transformer
b. Ammeter
d. None of the above

A

c. Instrument Current Transformer

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25
Q

It is an instrument for measuring high AC voltages

a. voltmeter
c. multitester
b. Instrument potential transformer
d. None of the above

A

b. Instrument Potential Transformer

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26
Q

The insulation resistance of the electric motor mounted on a bucket elevator of a rice mill plant has deteriorated, what electrical instrument is to be used?

a. Mega Ohmeter
b. AC Clamp-on meter
c. Potential transformer
d. Watt meter

A

a. Mega Ohmeter

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27
Q

One application of a megger is to measure the strength of insulation resistance in

a. Milli ohms
b. Mega ohms
c. ohms
d. Kilo ohms

A

b. Mega ohms

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28
Q

It is the number of cycles produced every second

a. period
b. wave
c. frequency
d. none of the above

A

c. frequency

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29
Q

In AC systems, the current and voltage is

a. In phase
b. Out of phase
c. No phase
d. None of the above

A

a. In phase

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30
Q

It is a property of a device which opposes any changes in the voltage

a. Inductance
b. Capacitance
c. Resistance
d. Impedance

A

b. capacitance

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31
Q

It is a property of a conductor which opposes any change in current

a. Inductance
b. Capacitance
c. Resistance
d. Impedance

A

a. inductance

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32
Q

It is the opposition to an alternating current by the combined effect of resistances, inductive resistances, and capacitive resistances

a. Inductance
b. Capacitance
c. Resistance
d. Impedance

A

d. impedance

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33
Q

in a resistive circuit, the current ____ voltage

a. Leads
b. lags
c. Is in in-phase with
d. Is in out-of-phase with

A

c. Is in in-phase with

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34
Q
  1. in an inductive circuit, the current ____ voltage

a. Leads
b. lags
c. Is in in-phase with
d. Is in out-of-phase with

A

b. lags

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35
Q

in a capacitive circuit, the current ____ voltage

a. Leads
b. lags
c. Is in in-phase with
d. Is in out-of-phase with

A

a. leads

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36
Q

The power produced by a capacitive or inductive load

a. reactive
b. true
c. apparent
d. None of the above

A

a. reactive

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37
Q

the power produced by a resistive load.

a. reactive
c. apparent
b. true
d. None of the above

A

b. true

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38
Q

what is the unit of an apparent power?

a. Volt Ampere
b. Volt Ampere Reactive
C. Watts
d. Horsepower

A

a. volt ampere

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39
Q

what is the unit of a real power?

a. Volt Ampere
b. Volt Ampere Reactive
C. Watts
d. Horsepower

A

c. watts

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40
Q

what is the unit of a reactive power?

a. Volt Ampere
b. Volt Ampere Reactive
C. Watts
d. Horsepower

A

b. volt ampere reactive

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41
Q

In a three-phase system, the instantaneous voltages of the three voltages are

a. Volt Ampere
b. Equal with magnitude
c. Equal only with frequency
d. Not Equal

A

d. not equal

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42
Q

In a three-phase system, the voltages are equal in?

a. Magnitude
b. frequency
c. Magnitude and frequency
d. None of the above

A

c. magnitude and frequency

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43
Q

It is an electrical machine that converts the electrical energy into mechanical energy

a. Generator
b. Electric motor
c. Transformers
d. None of the above

A

b. electric motor

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44
Q

it is an electrical machine used to transfer AC energy from one circuit to another

a. Electric motor
b. generator
c. Transformer
d. None of the above

A

c. transformer

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45
Q

It is an electrical machine that converts the mechanical energy into electrical energy

a. Generator
b. Electric motor
c. Transformers
d. None of the above

A

a. generator

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46
Q

If a motor is used in driving a corn sheller machine it should be able to?

a. Drive the load at the proper speed
c. Withstand the abuse of its surroundings
b. Start the load
d. All of the above

A

d. all of the above

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47
Q

What is the most common electric motor motor speeds?

a. 1750 rpm
b. 3600 rpm
C. 900
d. 1200

A

a. 1750 rpm

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48
Q

A universal motor means it can run on

a. Either AC/DC source
b. Variable DC only
C. DC source
d. AC source

A

a. either AC/DC source

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49
Q

Types of current information found in an electric motor

a. In rush current
b. Nameplate current
c. Full load ampere
d. All of the above

A

d. all of the above

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50
Q

In the nameplate of an electric motor, it is a multiplier that is applied to the motor’s normal horsepower rating to indicate an increase in power output (or overload capacity) that the motor is capable of providing under certain conditions.

a. Power factor
b. efficiency
c. service factor
d. duty cycle

A

c. service factor

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51
Q

Typically, the in rush current of a motor is of its full load ampere

a. 6-8 times
b. 2-4 times
c. 4-6 times
d. 1-2 times

A

a. 6-8 times

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52
Q

The starting current of an electric motor is

a. Higher
b. lower
c. the same
d. an induction type-transformer

A

a. higher

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53
Q

When an electric motor is rated 10 hp and above, it is to be operated at what source?

a. 220 V single phase source
b. 420 V DC source
c. 480 V single phase source
d. three phase source

A

d. three phase source

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54
Q

A motor mounted in an axial fan for the blower of a flatbed dryer is operating at higher than normal temperature. Most likely what is the possible cause/s?

a. It is overloaded
b. There is a loose connection in the
c. The line frequency is incorrect
d. It is hot summer time overload relay

A

a. It is overloaded

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55
Q

The meaning of JIS

a. Japanese Institute Standards
b. Japanese Iron and Steel
c. Japanese Industrial Standards
d. None of the above

A

c. Japanese Industrial Standards

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55
Q

A 3 phase motor was installed in a blower for paddy cleaner but the rotation needs to be reversed. What should be done to correct the rotation?

a. Rewind the stator windings leads
b. Install a forward reverse control circuit
c. Reverse any two connection of motor
d. Install a frequency inverter device
e. Increase the voltage source

A

c. Reverse any two connection of motor leads

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56
Q

A rice mill equipment was imported in Japan using the JIS standards. If the red pilot bulb turns on on its control panel, what does the red light indicate?

a. Running
b. idle
c. Fault
d. No meaning

A

a. Running

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56
Q

The meaning of ANSI

a. American National Steel and Iron
b. American National Standards for Iron
c. American National Standards Institute
d. None of the above

A

c. American National Standards Institute

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57
Q

If the equipment is imported from US using ANSI standards, what will be the indication of a red pilot bulb?

a. Running
b. idle
c. Fault
d. No meaning

A

b. Idle

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58
Q

If the equipment is imported from Germany using DIN standards, a red pilot bulb indicates?

a. Running
b. idle
c. Fault
d. No meaning

A

c. Fault

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59
Q

It is a magnetically actuated device for repeatedly establishing or interrupting an electric power circuit.

a. Actuator
b. Contactor
c. Electroswitch
d. None of the above

A

b. Contactor

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60
Q

It is a motor switch that is a combination of a contactor and an overload relay

a. Motor Starting Switch
b. Circuit breaker
c. Magnetic Motor Starter
d. None of the above

A

c. Magnetic Motor Starter

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61
Q

It is a type of switching device extremely useful when controlling a large amont of current and/or voltage with a small electrical signal

a Relay
b Timer switch
c Dimmer switch
d Knife switch

A

a. Relay

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62
Q

it is a control device that monitors the temperature or changes in temperature for a particular process

a. Thermocouple
b. Thermostat
c. Resistance temperature detectors
d. Thermistors

A

b. Thermostat

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63
Q

it is a commonly used device to monitor a system and, in the event that pressure reaches a dangerous level, it opens a relief valve or shut the system down.

a. Pressure switches
b. Piezoelectric device
c. Float switch
d. Limit switch

A

a. Pressure switches

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64
Q

a device designed to meet the special protective needs of motor control circuits.

a. Magnetic contactor
b. Circuit breaker
c. Fuse
d. Overload Relays

A

d. Overload Relays

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65
Q

A grain blower is running at 1000 rpm. If the rpm is to be reduced to 700, which of the following is possible for reducing the speed?

a. Install a variable frequency drive
b. Install a gear motor
c. Install belt drives
d. All of the above

A

d. All of the above

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66
Q

An electrical control device used to activate a switch for a define temperature.

a. Thermostat
b. Thermometer
c. Thermistor
d. None of the above

A

a. Thermostat

67
Q

The device used to control the amount of moisture present in storage room

a. Hygrometer
b. Humidistat
c. Hygro-thermograph
d. humidifier

A

b. Humidistat

68
Q

In order for a water not to overflow in the water tank of a poultry farm, what would you recommend as an Agricultural Engineer?

a. Install a float switch to shut off and on the pump
b. Install a motor controller to limit the pumping speed
c. Close the valve manually
d. Close the tank when it is full

A

a. Install a float switch to shut off and on the pump

69
Q

As an agricultural engineer, what electrical control devices would you recommend for poultry incubators?

a. Thermometer and hygrometer
b. Thermostat and humidistat
c. Psychrometer and manometer
d. None of the above

A

b. Thermostat and humidistat

70
Q

A mist-sprinkler irrigation system is to be designed to provide the required head requirement for the pump system. As an Agricultural Engineer, what would you recommend to control the head requirement of the pump so it can deliver water to the emitters?

a. Float valve
b. Limit switch
c. Pressure switch
d. None of the above

A

c. Pressure switch

71
Q

A biomass-fed furnace is designed to use a blower to control the amount of air for the combustion of fuel in order to maintain the temperature required for drying. As an Agricultural Engineer, what would you recommend to control the blower in providing the amount of air to the furnace?

a. Thermostat
b. Motor controller
c. Thermostat and motor controller
d. None of the above

A

c. thermostat and motor controller

72
Q

A device consisting of two unlike materials bonded together and expands with different rate when heated providing physical signal and converts it to electrical signals

a. Bellow sensor
b. Bimetallic sensor
c. Capillary tube senor
d. None of the above

A

b. bimetallic sensor

73
Q

A sensor that changes internal pressure when temperature changes and uses a temperature sensitive liquid

a. Bellow sensor
b. Bimetallic sensor
c. Capillary tube senor
d. None of the above

A

c. capillary tube sensor

74
Q

A cylindrical device with several deep folds that expand and contract in response to pressure, inside of which is medium or a material that responses with the change in temperature

a. Bellow sensor
b. Bimetallic sensor
c. Capillary tube senor
d. None of the above

A

a. bellow sensor

75
Q

Which of the following is not correct if the fuse element in an entire series circuits melts due to excessive current?

a. the entire circuit is shorted
b. the fuse element is opened
c. The fuse protected the circuit components against overload
d. The fuse is replaceable

A

a. the entire circuit is shorted

76
Q

It is a device used to vary the resistance

a. potentiometer
b. rheostats
c. variac
d. all of the above

A

d. all of the above

77
Q

a timer in motor control is to ?

a. indicate that the motor is overloaded
b. increase the revolution of the motor
c. delay the normal operation of the motor
d. stop the motor

A

c. delay the normal operation of the motor

78
Q

A poultry housing owner would like his perimeter lighting be automatically off during daytime. What switch should be installed?

a. Photoelectric switch
b. On-off switch
c. Magnetic contactor
d. Limit switch

A

a. photoelectric switch

79
Q

It is a part of a motor circuit where conductors are sized according to the current drawn by the motor.

a. Control circuit
b. Contactors
c. Power circuit
d. Overload Relay

A

C. power circuit

80
Q

It is a part of a motor circuit where it contains the control devices that will initiate the starting or stopping of the motor.

a. Contactors
b. Power circuit
c. Control circuit
d. Overload Relay

A

c. control circuit

81
Q

It is defined as the brief closure of a motor circuit to energize a motor for a short period of time.

a. Jogging
b. Plugging
c. Jumping
d. None of the above

A

a. jogging

82
Q

It is a method of stopping a polyphase motor quickly by momentarily connecting the motor for the reverse rotation while the motor is running

a. Jogging
c. Jumping
b. Plugging
d. None of the above

A

b. plugging

83
Q

It is the simplest motor control circuit.

a. Jog motor control
b. Two station motor control
c. Across the line magnetic starter
d. Forward reverse motor control

A

c. across the line magnetic starter

84
Q

It is a motor control circuit where you can control the motor in two different station.

a. Jog motor control
b. Two station motor control
c. Across the line magnetic starter
d. Forward reverse motor control

A

b. two station motor control

85
Q

It is a motor control circuit where the motor shaft can run clockwise or counterclockwise.

a. Jog motor control
b. Two station motor control
c. Across the line magnetic starter
d. Forward reverse motor control

A

d. forward reverse motor control

86
Q

It is a type of motor control circuit where the motor can be energized only by a short period of time.

a. Jog motor control
b. Two station motor control
c. Across the line magnetic starter
d. Forward reverse motor control

A

a. jog motor control

87
Q

it is the number of watts required by the electrical equipment in use in the building

a. electrical load
b. electrical capacity
c. electrical supply
d. none of the above

A

a. electrical load

88
Q

It is a portion of electrical supply extending from the generating station to substation or from substation to substation

a. Distribution lines
b. Transmission lines
c. Service drop wire
d. Service entrance cables

A

b. transmission lines

89
Q

It is a portion of electrical supply having low voltages (6,900 V) extending from the substation to the various consumers.

a. Distribution lines
b. Transmission lines
c. Service drop wire
d. Service entrance cables

A

a. distribution lines

90
Q

It is a portion of electrical supply extending from the transformer of a distribution lines into the building electrical entrance.

a. Distribution lines
b. Transmission lines
c. Service drop wire
d. Service entrance cables

A

c. service drop wire

91
Q

It is the portion of electric conductors (cable) that extends from the service-entrance switch to a certain group of outlets or to a certain group of outlets or to a single outlet.

a. service drop wire
b. Service entrance
c. Electric Service Metering
d. Feeder
e. Branch circuit

A

e. branch circuit

92
Q

It is the portion of supply conductors which extends from the street main duct or transformer to the service or switchboard of the building supply

a. service drop wire
c. Electric Service Metering
b. Service entrance
d. Feeder
e. Branch circuit

A

b. service entrance

93
Q

The most common voltages for residential and industrial applications

a. 120 V
b. 240 V
C. 480 V
d. All of the above

94
Q

If a slaughterhouse building is to be constructed near the public roads, what is the recommended vertical clearance of the entrance cap?

a. 3.05 m
b. 3.66 m
c. 5.49 m
d. 7.32 m

95
Q

An electric meter is installed

a. Outside
b. Inside the building at the property line wall, or electric post.
C. Both outside and inside
d. None of the above

A

a. outside

96
Q

It is a set of conductors between the service equipment and the final branch circuit over current device.

a. Service drop wire
b. Service entrance
c. Electric Service Metering
d. Feeder
e. Branch circuit

97
Q

It is the common type of service wire installed by electric power supply companies for industrial, commercial, and residential houses.

a. Overhead service entrance
b. Underground Service Entrance
c. On ground Service Entrance
d. None of the above

A

a. overhead service entrance

98
Q

It is the wiring extending from the service switch, generator bus, or converter bus, to the main distribution center or electric service equipment

a. Main Feeder
b. Sub Feeder
c. Main protection
d. Service Drop

A

a. main feeder

99
Q

It is a type of service entrance consisting of a raceway (conduit) extending from the building to the property line where it is tapped to the main.

a. Overhead service entrance
b. Underground Service Entrance
c. On ground Service Entrance
d. None of the above

A

b. underground service entrance

100
Q

The circuit conductors between the final overcurrent device protecting the circuit and the outlets

a. Branch circuit
c. Service drop wire
b. Feeder lines
d. None of the above

A

a. branch circuit

101
Q

Which of the follwing is not a classification of the branch circuit?

a. General purpose branch circuit
c. Individual Branch Circuit
b. Appliance branch circuit
d. None of the above

A

d. none of the above

102
Q

It is a branch circuit supplying energy to one or more outlet to which appliances are to be connected

a. General purpose branch circuit
b. Appliance branch circuit
c. Individual Branch Circuit
d. None of the above

A

b. appliance branch circuit

103
Q

It is a branch circuit that supplies a number of outlets for lighting and appliances

a. General purpose branch circuit
b. Appliance branch circuit
c. Individual Branch Circuit
d. None of the above

A

a. general purpose branch circuit

104
Q

It is a branch circuit that supplies only one utilization equipment

a. General purpose branch circuit
c. Individual Branch Circuit
b. Appliance branch circuit
d. None of the above

A

c. individual branch circuit

105
Q

What is the recommended minimum size of conductor for the general purpose branch circuit?

a. AWG No. 10
b. AWG No. 12
c. AWG No. 14
d. AWG No. 16

A

b. AWG No. 12

106
Q

Which of the following is not true for a good practices in circuiting

a. Lighting and receptacles should not be combined in a single circuit
b. All building lights should be connected on a single branch circuit
c. Branch circuit should be protected from over current
d. None of the above

A

b. All building lights should be connected on a single branch circuit

107
Q

Considered high voltages are those exceeding

a. 110 V
b. 220 V
C. 600 V
d. 800 V

108
Q

Considered low voltages are those exceeding

a. 12 V
C. 48 V
b. 24 V
d. 110 V

109
Q

It usually consists of a circuit breaker or switch and fuses, and their accessories, located near the point of entrance of supply conductors to a building or other structure, or an otherwise defined area, and intended to constutute the mmain control and means of cut-off of the supply.

a. Branch circuit
b. Feeder lines
c. Service Equipment
d. None of the above

A

c. service equipment

110
Q

Ordinary conductor wires for buildings in normally rated at

a. 100 or 200 volts
b. 250 or 500 volts
C. 300 or 600 volts
d. None of the above

A

c. 300 0r 600 V

111
Q

They are electrical conductors 8mm^2 and smaller in sizes

a. Wires
b. Cables
c. Tendons
d. None of the above

112
Q

They are electrical conductors larger than 8mm^2

a. wires
b. Cables
C. Mil
d. None of the above

113
Q

It is a conductor consists of wires twisted to form a metallic string.
a. Solid wires
b. Cables
c. Stranded wire
d.

A

c. stranded wire

114
Q

It is the term given to an insulated stranded wire

a. Cord
c. tendons
b. cable
d. None of the above

115
Q

What is the minimum conductor size of aluminum or copper-clade aluminum for voltage rating 0 to 2000 volts?
a. 2.0 mm2
b. 3.5 mm2
c. 8.0 mm2
d. 30 mm2

A

b. 3.5 mm^2

116
Q

What is the minimum conductor size of copper for voltage rating 0 to 2000 volts?

a. 2.0 mm2
b. 3.5 mm2
c. 8.0 mm2
d. 30 mm2

A

a. 2.0 mm^2

117
Q

what are common informations that can be seen in the conductor or cable markings?

a. The maximum rated voltage
b. The size in millimeter square
c. Manufacturer’s name
d. the proper designation for the type of cable or wire
e. all of the above

A

e. all of the above

118
Q

A wire with a letter type THW has a trade name of

a. Moisture and heat resistant rubber
b. Moisture and heat resistant thermoplastic
e. all of the above
c. Thermoplastic heat resistant
d. Moisture resistant Thermoplastic

A

b. moisture and heat resistant thermoplastic

119
Q

A wire with a letter type THHN has a trade name of

a. Moisture and heat resistant rubber
b. Moisture and heat resistant thermoplastic
c. Thermoplastic heat resistant
d. Moisture resistant Thermoplastic

A

c. thermoplastic heat resistant

120
Q

A wire with a letter type TW has a trade name of

a. Moisture and heat resistant rubber
b. Moisture and heat resistant thermoplastic
c. Thermoplastic heat resistant
d. Moisture resistant Thermoplastic

A

d. moisture resistant thermoplastic

121
Q

It is defined as the ability of the wire or conductor to carry current without overheating

a. Resistivity
c. Ampacity
b. Conductivity
d. capacity

A

c. ampacity

122
Q

In practice, the conductor ampacity is ______ if its in open air compared to when it is in a raceway.

a. The same
b. Increased
c. Decreased
d. None of the above

A

b. increased

123
Q

The ampacity of a conductor increases as the sizes of conductor increases

a. true
b. false

124
Q

An enclosed channel of metal or nonmetallic materials designed expressly for holding wires, cables or busbars

a. receptacle
b. outlet
C. raceway
d. switches

A

c. raceway

125
Q

It is the most common electrical raceways used in all types of construction. With respect to the type of materials used.

a. Cable trays
c. conduit
b. busway
d. Cellular floor raceways

A

d. conduit

126
Q

Common types of electrical conduits

a. Rigid metal
b. Flexible metal
c. Rigid pvc
d. Flexible pvc
e. all of the above

A

e. all of the above

127
Q

What is the minimum conduit size that can be used?

a. 10 mm
c. 15 mm
b. 12 mm
d. 20 mm

128
Q

It is a type of conduit of circular cross section made of helically wound, formed, interlocked metal strip

a. Flexible Metal Conduit (FMC)
b. Rigid Steel Conduit (RSC)
C. PVC
d. Flexible plastic conduit

A

a. flexible metal conduit (FMC)

129
Q

A 15mm rigid metal conduit is used for the wirings of a bagged storage warehouse. The conduit is supported by series of steel clamps spaced at a distance. What is the maximum spacing allowable?

a. 2 m
b. 2.5 m
c. 3 m
d. 3.5 m

130
Q

A 15mm rigid nonmetallic conduit is used for the wirings of a bagged storage warehouse. The conduit is supported by series of clamps spaced at a distance. What is the maximum spacing allowable?

a. 0.6 m
b. 0.9 m
c. 1.2 m
d. 1.5 m

131
Q

Which of the following materials are associated with when installing a conduit?

a. clamps
b. couplings
c. fittings
d. All of the above

A

d. all of the above

132
Q

It is used to enclose wiring connections for a number of applications like switches, fixtures, and outlets to protect them.

a. Panel boards
b. Electrical boxes
c. Wiring devices
d. conduits

A

b. electrical boxes

133
Q

It is the box commonly used for switches and outlets.

a. Utility box
c. Square box
b. Junction box
d. Pull box

A

a. utility box

134
Q

What is the shape of the box commonly used as junction box?

a. Round
b. Square
c. Octagonal
d. Triangular

A

c. octagonal

135
Q

Which of the following installations are electrical boxes be installed?

a. Mounted on wall surface
b. Behind the walls and in recesses
c. ceiling
d. All of the above

A

d. all of the above

136
Q

It is a box with blank cover that is inserted in one or more runs or raceways to facilitate pulling-in the conductors

a. Utility box
b. Junction box
c. Square box
d. Pull box

A

d. pull box

137
Q

It is an outlet intended for direct connection of a lamp holder, a luminaire, or a pendant cord terminating in a lampholder.

a. Lighting outlet
b. Convenience outlet
c. Receptacle outlet
d. None of the above

A

a. lighting outlet

138
Q

It is a device that by insertion into a receptacle establishes connection between the conductor of the flexible cord and the conductors connected permanently to the receptacle.

a. Lighting outlet
c. Receptacle outlet
b. Convenience outlet
d. None of the above

A

b. convenience outlet

139
Q

It is an outlet where one or more receptacles are installed

a. Lighting outlet
c. Receptacle outlet
b. Convenience outlet
d. None of the above

A

c. receptacle outlet

140
Q

when mounting a wall convenience outlet, what should be the distance from the finished floor line?

a. 30 to 45 cm
b. 15 to 30 cm
c. 45 to 60 cm

A

a. 30 to 45 cm

141
Q

in areas like farm shops, the mounting height of the receptacle is
a. 30 to 45 cm
b. 15 to 30 cm
C. 105 to 110 cm`

A

c. 105 to 110 cm

142
Q

Electrical outlet are rated in

a. Amperes
b. Ohms
c. Voltage
d. None of the above

A

a. amperes

143
Q

it is a device that open or close the circuitry in an electric circuit

a. outlet
c. conduits
b. switches
d. fixtures

A

b. switches

144
Q

it is the most commonly used switch to control a light, receptacle, or other device from a single location.

a. Single pole switch
c. Three way switch
b. Double pole switch
d. Four way switch

A

a. single pole switch

145
Q

how many terminals does a single pole switch have?

a. 2
C. 4
b. 3
d. 1

146
Q

it is a type of switch commonly used in industrial applications and having four terminals instead of two.

a. Single pole switch
b. Double pole switch
c. Three way switch
d. Four way switch

A

b. double pole switch

147
Q

the no. of terminals a two pole switch has?
a. 2
b. 3
C. 4
d. 1

148
Q

a type of switch used in pairs and allow you to control a light or receptacle from two different locations.

a. Single pole switch
b. Double pole switch
c. Three way switch
d. Four way switch

A

c. three way switch

149
Q

the no. of terminals a three way switch has?

a. 2
b. 3
C. 4
d. 1

150
Q

it is a type of switch used in between a pair of three way switches to provide control from three or more different locations.

a. Single pole switch
b. Double pole switch
c. Three way switch
d. Four way switch

A

d. four way switch

151
Q

common ratings for single pole switches

a. 15A
b. 20A
c. Both a and b
d. None of the above

A

c. both a and b

152
Q

it is a type of an electrical outlet with 3 prongs

a. grounded
b. ungrounded
c.
d. four way switch

A

a. grounded

153
Q

it is a type of an electrical outlet with 2 prongs

a. grounded
C.
b. ungrounded
d. Four way switch

A

b. ungrounded

154
Q

which of the following is the most common type of an electrical outlet?

a. single
b. Duplex
c. triplex
d. quadplex

155
Q

this type of lamp are critically dependent on the wattage supply that even for a small fluctuation of the current voltage, its life, output, and efficiency is materially affected

a. Incandescent lamp
b. Fluorescent Lamp
c. Tungsten-Halogen Lamp
d. Led lights

A

a. incandescent lamp

156
Q

these are electrical devices designed to hold and connect the lamps to power supply as well as control and distribute the light, and to position and protect the lamp

a. Junction box
b. Lighting outlets
c. Lighting fixtures
d. None of the above

A

c. lighting fixtures

157
Q

it is a part of a lamp that is necessary to for start up, and thereafer to control the arc

a. ballast
b. Lamp holder
c. reflectors
d. diffusers

A

a. ballast

158
Q

When a fluorescent lamp makes no starting effort, what are the possible causes?

a. Defective ballast
b. Lamp not making proper contact
c. Loose starter
d. All of the above

A

d. all of the above

159
Q

A fluorescent lamp produces about ___ more light per watt than does the incandescent

a. The same
c. 3x
d. 4x
b. 2x

160
Q

it is a box wherein the protective devices are grouped from which they are fed

a. Utility box
b. Pull box
c. Panel Board
d. Bread board

A

c. panel board

161
Q

which of the following is not true when installing a panel board

a. it must be placed in an accessible location
b. It must be installed near the load center
c. It must be located where the branch circuit exceeds 35 meters long
d. None of the above

A

c, it must be located where the branch circuit exceeds 35 meters long

162
Q

It is a device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.

a. Overload Protection Device
c. Fuse
b. Circuit Breaker
d. None of the above

A

b. circuit breaker

163
Q

It refers to the cutting-off or disconnection of the current supply

a. trip
c. off
b. click
d. None of the above

164
Q

A circuit breaker installed in a hammer mill equipment is always tripping. What is the possible cause?

a. There is no power source
b. The supply lines are open
c. There is an overloading
d. The load is removed

A

c. there is an overloading

165
Q

What is the lighting requirement for the feeding area of dairy cattle housing?

a. 200 lux
b. 70 lux
c. 30 lux
d. 300 lux

A

a. 200 lux

166
Q

What is the lighting requirement for the pens of a dairy cattle housing

a. 200 lux
b. 70 lux
c. 30 lux
d. 300 lux

167
Q

What is the lighting requirement for feed storage area of a dairy cattle housing?

a. 200 lux
b. 70 lux
c. 30 lux
d. 300 lux

Area 3 (10 decks)

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