I LEVEL 3 FINAL Exam Questions
and Answers Verified Solutions Latest
Update
Question:
d. element.
Answer:
c electromagnetism ⚫ Electrons flowing from one place to another make a: a. current.
b. track. c. circuit. d. channel. a current ⚫ Between two objects, the development of
static charges creates a: a. potential difference. b. battery. c. thermocouple. d.
resistance. a potential difference ⚫ A coil of wire that carries an electric current is
called a: a. conductor. b. thermocouple. c. electrocurrent. d. electromagnet. Answer: d
electromagnet ⚫ Metals are good conductors because they have many: a. insulators. b.
free electrons. c. resistors. d. inductors. Answer: b free electrons ⚫ The amount of
potential difference a layer of insulation can withstand without breaking down is: a.
resistance. b. voltage drop. c. dielectric strength. d. ampacity. Answer: c dielectric
strength ⚫ What is the property of a coil of wire that opposes any change in the current
in the coil? a. Inductance b. Resistance c. Impedance d. Watts. Answer: a Inductance ⚫
What is the correct name for "voltage" or electromotive force? a. Element b. Electron c.
Circuit d. Potential difference. Answer: d Potential difference ⚫ A rate of flow of one
coulomb per second is called one: a. ampere. b. joule. c. volt. d. olhum. Answer: a
ampere ⚫ What is the name for the proportional relationship between potential
difference and current? a. Voltage drop b. Voltmeter c. Ampmeter d. Watt meter.
Answer: b Voltmeter ⚫ What is the unit of measurement for capacitive reactance? a.
Volts b. Ohms c. Amps d. Power factor. Answer: b Ohms ⚫ Power companies use AC
generators because AC can be sent over long distances: a. at high cost. b. at low cost.
c. slower. d. faster. Answer: b at low cost ⚫ What device changes alternating current to
a different combination of voltage and current? a. Generator b. Capacitor c. Alternator
d. Transformer. Answer: d Transformer ⚫ How does the power going into a transformer
compare to the power coming out? a. Lower b. Equal c. Double d. Higher. Answer: b
Equal ⚫ What changes continuously around the conductor when current changes
continuousl in AC circuits? a. Voltage b. Current c. Magnetic field d. Amps. Answer: c
Magnetic field ⚫ Wires and cables can be classified according to their: a. color. b. size.
c. covering. d. shape. Answer: c covering. ⚫ What kind of starter provides full-voltage
starting? a. Across-the-line b. Synchronous start c. Reactor starter d. Reduced-voltage
start. Answer: a Across-the-line ⚫ The choice between across-the-line starting and
reduced-voltage starting depends in part on the size of the: a. starter. b. wire size. c.
motor. d. breaker. Answer: c motor. ⚫ The most important requirement for good
, maintenance of motor starters is: a. good record keeping. b. safety of personnel. c.
proper lubrication. d. clean, dry insulation. Answer: c proper lubrication ⚫ A reversing
starter reverses a three-phase motor by interchanging: a. main contacts. b. two of the
line leads. c. all of the line leads. d. control voltage. Answer: b two of the line leads ⚫
What kind of protection is provided in a manual across-the-line three-phase motor
control? a. Overload protection only b. Ground-fault protection only c. Short-circuit
protection only d. All of the above. Answer: a Overload protection only ⚫ Commonly
used instead of fuses in industrial power distribution systems are: a. disconnects. b.
motor starters. c. overcurrent relays. d. circuit breakers. Answer: d circuit breakers. ⚫
Distribution protection usually consists of two elements, protection of both: a.
equipment and circuit. b. personnel and equipment. c. wire and control relay. d. ground
fault and current. Answer: a equipment and circuit ⚫ What is the current in amperes of
a 120-volt circuit with a resistance of 60 ohms, using Ohm's Law? a. 0.5 amperes b. 2.0
amperes c. 30 amperes d. 10 amperes. Answer: b 2.0 amperes Solving for I: I = ER
Substituting values into the equation: I = 120 volts/60 Ohms = 2 amperes ⚫ What is
the current for a 120-volt circuit with a 1440-watt load? a. 0.083 amperes b. 10
amperes c. 12 amperes d. 15 amperes. Answer: c 12 amperes Since P = EI, current can
be determined as I = P/E Substituting values into the equation: I = 1440 watts /120
volts = 12 amperes ⚫ What is the current of a circuit that consumes 625 watts through
a 12.75-ohm resistor? a. 3.8 amperes b. 7 amperes c. 49 amperes d. 175 amperes.
Answer: b 7 amperes E = IR and P = EI Substituting the first equation into the second: P
= (IR)I P = I Squared x R Solving for I: I Squared = P / R I = SqRt P/R I = SqRt 625/12.75
I = SqRt 49 I = 7 amps ⚫ What is the ampere load of a single-phase 1/2 horsepower
115- volt motor, if the motor has an efficiency rating 92% and power factor of 80%? a.
9.5 amperes b. 2.4 amperes c. 4.4 amperes d. 78.1 amperes. Answer: c 4.4 amperes
Use the formula I = 746 x horsepower / voltage x efficiency x power factor, where I is
the current. I = 746 x 0. x 0.92 x 0.80 = 4.4 amperes ⚫ A 230-volt single-phase
circuit has a 12-kilowatt power load and operates at 84% power factor. What is the
current? a. 43 amperes b. 52 amperes c. 62 amperes d. 70 amperes. Answer: c 62
amperes the formula I = kilowatts x 1.000 / voltage x power factor where I is the
current. I = 12 x 1. x 0.84 = 62 amperes ⚫ The difference between the
measurement signal and the set point is called the: a. gap. b. error. c. feedback. d.
span. Answer: b error ⚫ The signal pressure is usually directly proportional to the
process: a. span. b. level. c. variable. d. loop. Answer: c variable ⚫ Offset is the
difference between the actual maintained value of the measured variable and: a. the
set-point. b. the span. c. zero. d. the level. Answer: a the set-point ⚫ Another name for
built-in error that usually occurs in a proportional control system is: a. deadband. b.
offset. c. set point. d. span. Answer: b offset ⚫ An automatic controller always
compares a measured variable to: a. zero. b. span. c. reset. d. set point. Answer: d set
point. ⚫ The specific value at which an automatic control holds a process variable is
called the: a. span. b. variable. c. control point. d. set point. Answer: c control point ⚫
The drawing that provides a view of the entire system in process control is the: a. P&ID
drawing. b. I/P drawing. c. element drawing. d. primary drawing. Answer: a P&ID
drawing ⚫ A tag number with a code reading FRC identifies a. field recording controller.
and Answers Verified Solutions Latest
Update
Question:
d. element.
Answer:
c electromagnetism ⚫ Electrons flowing from one place to another make a: a. current.
b. track. c. circuit. d. channel. a current ⚫ Between two objects, the development of
static charges creates a: a. potential difference. b. battery. c. thermocouple. d.
resistance. a potential difference ⚫ A coil of wire that carries an electric current is
called a: a. conductor. b. thermocouple. c. electrocurrent. d. electromagnet. Answer: d
electromagnet ⚫ Metals are good conductors because they have many: a. insulators. b.
free electrons. c. resistors. d. inductors. Answer: b free electrons ⚫ The amount of
potential difference a layer of insulation can withstand without breaking down is: a.
resistance. b. voltage drop. c. dielectric strength. d. ampacity. Answer: c dielectric
strength ⚫ What is the property of a coil of wire that opposes any change in the current
in the coil? a. Inductance b. Resistance c. Impedance d. Watts. Answer: a Inductance ⚫
What is the correct name for "voltage" or electromotive force? a. Element b. Electron c.
Circuit d. Potential difference. Answer: d Potential difference ⚫ A rate of flow of one
coulomb per second is called one: a. ampere. b. joule. c. volt. d. olhum. Answer: a
ampere ⚫ What is the name for the proportional relationship between potential
difference and current? a. Voltage drop b. Voltmeter c. Ampmeter d. Watt meter.
Answer: b Voltmeter ⚫ What is the unit of measurement for capacitive reactance? a.
Volts b. Ohms c. Amps d. Power factor. Answer: b Ohms ⚫ Power companies use AC
generators because AC can be sent over long distances: a. at high cost. b. at low cost.
c. slower. d. faster. Answer: b at low cost ⚫ What device changes alternating current to
a different combination of voltage and current? a. Generator b. Capacitor c. Alternator
d. Transformer. Answer: d Transformer ⚫ How does the power going into a transformer
compare to the power coming out? a. Lower b. Equal c. Double d. Higher. Answer: b
Equal ⚫ What changes continuously around the conductor when current changes
continuousl in AC circuits? a. Voltage b. Current c. Magnetic field d. Amps. Answer: c
Magnetic field ⚫ Wires and cables can be classified according to their: a. color. b. size.
c. covering. d. shape. Answer: c covering. ⚫ What kind of starter provides full-voltage
starting? a. Across-the-line b. Synchronous start c. Reactor starter d. Reduced-voltage
start. Answer: a Across-the-line ⚫ The choice between across-the-line starting and
reduced-voltage starting depends in part on the size of the: a. starter. b. wire size. c.
motor. d. breaker. Answer: c motor. ⚫ The most important requirement for good
, maintenance of motor starters is: a. good record keeping. b. safety of personnel. c.
proper lubrication. d. clean, dry insulation. Answer: c proper lubrication ⚫ A reversing
starter reverses a three-phase motor by interchanging: a. main contacts. b. two of the
line leads. c. all of the line leads. d. control voltage. Answer: b two of the line leads ⚫
What kind of protection is provided in a manual across-the-line three-phase motor
control? a. Overload protection only b. Ground-fault protection only c. Short-circuit
protection only d. All of the above. Answer: a Overload protection only ⚫ Commonly
used instead of fuses in industrial power distribution systems are: a. disconnects. b.
motor starters. c. overcurrent relays. d. circuit breakers. Answer: d circuit breakers. ⚫
Distribution protection usually consists of two elements, protection of both: a.
equipment and circuit. b. personnel and equipment. c. wire and control relay. d. ground
fault and current. Answer: a equipment and circuit ⚫ What is the current in amperes of
a 120-volt circuit with a resistance of 60 ohms, using Ohm's Law? a. 0.5 amperes b. 2.0
amperes c. 30 amperes d. 10 amperes. Answer: b 2.0 amperes Solving for I: I = ER
Substituting values into the equation: I = 120 volts/60 Ohms = 2 amperes ⚫ What is
the current for a 120-volt circuit with a 1440-watt load? a. 0.083 amperes b. 10
amperes c. 12 amperes d. 15 amperes. Answer: c 12 amperes Since P = EI, current can
be determined as I = P/E Substituting values into the equation: I = 1440 watts /120
volts = 12 amperes ⚫ What is the current of a circuit that consumes 625 watts through
a 12.75-ohm resistor? a. 3.8 amperes b. 7 amperes c. 49 amperes d. 175 amperes.
Answer: b 7 amperes E = IR and P = EI Substituting the first equation into the second: P
= (IR)I P = I Squared x R Solving for I: I Squared = P / R I = SqRt P/R I = SqRt 625/12.75
I = SqRt 49 I = 7 amps ⚫ What is the ampere load of a single-phase 1/2 horsepower
115- volt motor, if the motor has an efficiency rating 92% and power factor of 80%? a.
9.5 amperes b. 2.4 amperes c. 4.4 amperes d. 78.1 amperes. Answer: c 4.4 amperes
Use the formula I = 746 x horsepower / voltage x efficiency x power factor, where I is
the current. I = 746 x 0. x 0.92 x 0.80 = 4.4 amperes ⚫ A 230-volt single-phase
circuit has a 12-kilowatt power load and operates at 84% power factor. What is the
current? a. 43 amperes b. 52 amperes c. 62 amperes d. 70 amperes. Answer: c 62
amperes the formula I = kilowatts x 1.000 / voltage x power factor where I is the
current. I = 12 x 1. x 0.84 = 62 amperes ⚫ The difference between the
measurement signal and the set point is called the: a. gap. b. error. c. feedback. d.
span. Answer: b error ⚫ The signal pressure is usually directly proportional to the
process: a. span. b. level. c. variable. d. loop. Answer: c variable ⚫ Offset is the
difference between the actual maintained value of the measured variable and: a. the
set-point. b. the span. c. zero. d. the level. Answer: a the set-point ⚫ Another name for
built-in error that usually occurs in a proportional control system is: a. deadband. b.
offset. c. set point. d. span. Answer: b offset ⚫ An automatic controller always
compares a measured variable to: a. zero. b. span. c. reset. d. set point. Answer: d set
point. ⚫ The specific value at which an automatic control holds a process variable is
called the: a. span. b. variable. c. control point. d. set point. Answer: c control point ⚫
The drawing that provides a view of the entire system in process control is the: a. P&ID
drawing. b. I/P drawing. c. element drawing. d. primary drawing. Answer: a P&ID
drawing ⚫ A tag number with a code reading FRC identifies a. field recording controller.
