ENGR 363 Final Exam Questions &
Answers 2024/2025
Normally Closed (NC) contacts on a relay are closed when the coil is in what state? - ANSWERSDe-
energized
Normally Open (NO) contacts on a relay are closed when the coil is in what state? - ANSWERSEnergized
A device that uses electrical energy to mechanically switch electrical circuits is called a(n): -
ANSWERSelectromechanical relay or relay
Electromechanical solenoids use electrical energy to magnetically cause a(n): - ANSWERSmechanical
control action
Another name for a plug-in or ice cube relay is a(n): - ANSWERSgeneral purpose relay
The ______ gate is also called an inverter and usually represents a normally _____ switch. -
ANSWERSNot
Closed
The ____ gate represents two or more normally ____ switches in parallel - ANSWERSOr
Open
Switches in series represent a(n) logical ____ gate. - ANSWERSAnd
The _____ gate will turn on the output if only one input is activated and turn the output off if both
inputs are activated - ANSWERSXOR
The opposite of an EXCLUSIVE OR gate is an EXCLUSIVE NOR gate - ANSWERSTrue
,An OR gate operates on the same principle as:
a series circuit
a pneumatic shuttle valve
a parallel circuit
a pneumatic check valve - ANSWERSA pneumatic shuttle valve
A parallel circuit
Input devices in series represent which type of logic circuit? - ANSWERSAnd
How many truth table entries are necessary for a three input logic gate? - ANSWERS8
A gate is a device that: - ANSWERSPerforms a logical decision based on its input.
What diameter cylinder is required to move a 10,000lb load with a 350psi hydraulic supply?
Round calculation numbers and the answer to 2 decimals. - ANSWERS6.01
When power is applied to a motor the start up torque is also known as______ torque - ANSWERSLocked
Rotor
Name two AC motors that use a centrifugal switch to remove the start winding when the motor reaches
75% of operating speed? - ANSWERSSplit Phase
Capacitor Start
Stepper (Step) motors use a _____ loop control system. - ANSWERSOpen
Electrical power in the United States is based on a frequency of _____ hertz or cycles per minute. -
ANSWERS60
, Run and Start capacitors can be interchanged or switched with each other with no harmful results -
ANSWERSFalse
Contactors have a common pole to switch between normally open and normally closed contact points. -
ANSWERSFalse
What two types of contactors were discussed? - ANSWERSMechanically held
Magnetically held
What is another name for a full voltage starter? - ANSWERSAcross the line starter
What are the two most common speed control methods for inverter duty induction motors? -
ANSWERSV/Hz
Flux Vector
Name the three major components of a pushbutton switch: - ANSWERSOperator
Legend Plate
Contact Block
Name the two methods used to reset a mushroom button operator to the normal state: - ANSWERSTwist
to release
Pull to release
What toggle switch has a positive center stop? - ANSWERSHesitation Switch
What device is needed to activate a reed switch? - ANSWERSMagnet
What is another name for a spring return operator? - ANSWERSMomentary
Answers 2024/2025
Normally Closed (NC) contacts on a relay are closed when the coil is in what state? - ANSWERSDe-
energized
Normally Open (NO) contacts on a relay are closed when the coil is in what state? - ANSWERSEnergized
A device that uses electrical energy to mechanically switch electrical circuits is called a(n): -
ANSWERSelectromechanical relay or relay
Electromechanical solenoids use electrical energy to magnetically cause a(n): - ANSWERSmechanical
control action
Another name for a plug-in or ice cube relay is a(n): - ANSWERSgeneral purpose relay
The ______ gate is also called an inverter and usually represents a normally _____ switch. -
ANSWERSNot
Closed
The ____ gate represents two or more normally ____ switches in parallel - ANSWERSOr
Open
Switches in series represent a(n) logical ____ gate. - ANSWERSAnd
The _____ gate will turn on the output if only one input is activated and turn the output off if both
inputs are activated - ANSWERSXOR
The opposite of an EXCLUSIVE OR gate is an EXCLUSIVE NOR gate - ANSWERSTrue
,An OR gate operates on the same principle as:
a series circuit
a pneumatic shuttle valve
a parallel circuit
a pneumatic check valve - ANSWERSA pneumatic shuttle valve
A parallel circuit
Input devices in series represent which type of logic circuit? - ANSWERSAnd
How many truth table entries are necessary for a three input logic gate? - ANSWERS8
A gate is a device that: - ANSWERSPerforms a logical decision based on its input.
What diameter cylinder is required to move a 10,000lb load with a 350psi hydraulic supply?
Round calculation numbers and the answer to 2 decimals. - ANSWERS6.01
When power is applied to a motor the start up torque is also known as______ torque - ANSWERSLocked
Rotor
Name two AC motors that use a centrifugal switch to remove the start winding when the motor reaches
75% of operating speed? - ANSWERSSplit Phase
Capacitor Start
Stepper (Step) motors use a _____ loop control system. - ANSWERSOpen
Electrical power in the United States is based on a frequency of _____ hertz or cycles per minute. -
ANSWERS60
, Run and Start capacitors can be interchanged or switched with each other with no harmful results -
ANSWERSFalse
Contactors have a common pole to switch between normally open and normally closed contact points. -
ANSWERSFalse
What two types of contactors were discussed? - ANSWERSMechanically held
Magnetically held
What is another name for a full voltage starter? - ANSWERSAcross the line starter
What are the two most common speed control methods for inverter duty induction motors? -
ANSWERSV/Hz
Flux Vector
Name the three major components of a pushbutton switch: - ANSWERSOperator
Legend Plate
Contact Block
Name the two methods used to reset a mushroom button operator to the normal state: - ANSWERSTwist
to release
Pull to release
What toggle switch has a positive center stop? - ANSWERSHesitation Switch
What device is needed to activate a reed switch? - ANSWERSMagnet
What is another name for a spring return operator? - ANSWERSMomentary
