Motor Controls Final Exam questions
with complete solutions graded A+
A ___ is a device that controls one electrical circuit by opening and closing contacts in another circuit. -
correct answer ✔✔relay
A(n) ___ relay is a switching device that has sets of contacts that are closed by a magnetic effect. -
correct answer ✔✔electromechanical
A ___ relay is a mechanical switch operated by a magnetic coil. - correct answer ✔✔general-purpose
___ relays are designed for commercial and industrial applications where economy and fast replacement
are high priorities. - correct answer ✔✔General-purpose
Relay ___ are described by their number of poles, throws, and breaks. - correct answer ✔✔contacts
A form ___ relay has one contact that is NO and closes (makes) when the coil is energized. - correct
answer ✔✔A
___ relays are the backbone of electromechanical control circuitry and are expected to have a long life
and a minimal amount of problems. - correct answer ✔✔Machine control
A ___ relay is a fast-operating, single-pole, single-throw switch with normally open contacts hermetically
sealed in a glass envelope. - correct answer ✔✔reed
A ___ is an overcurrent protection device with a mechanical mechanism that may manually or
automatically open the circuit when an overload condition or short circuit occurs. - correct answer
✔✔circuit breaker
with complete solutions graded A+
A ___ is a device that controls one electrical circuit by opening and closing contacts in another circuit. -
correct answer ✔✔relay
A(n) ___ relay is a switching device that has sets of contacts that are closed by a magnetic effect. -
correct answer ✔✔electromechanical
A ___ relay is a mechanical switch operated by a magnetic coil. - correct answer ✔✔general-purpose
___ relays are designed for commercial and industrial applications where economy and fast replacement
are high priorities. - correct answer ✔✔General-purpose
Relay ___ are described by their number of poles, throws, and breaks. - correct answer ✔✔contacts
A form ___ relay has one contact that is NO and closes (makes) when the coil is energized. - correct
answer ✔✔A
___ relays are the backbone of electromechanical control circuitry and are expected to have a long life
and a minimal amount of problems. - correct answer ✔✔Machine control
A ___ relay is a fast-operating, single-pole, single-throw switch with normally open contacts hermetically
sealed in a glass envelope. - correct answer ✔✔reed
A ___ is an overcurrent protection device with a mechanical mechanism that may manually or
automatically open the circuit when an overload condition or short circuit occurs. - correct answer
✔✔circuit breaker
