Chapter 2 basic controls
What is a meme of frame 56 motor shaft diameter? -
✔5/8 in (1.59cm)
What is the name of the ratio of mechanical power produced to the electrical power
input required by the motor -
✔Efficiency
A motor nameplate reads 230/460 V ,1.5/0.7 A. When connected in series 28 460
multiply how much current will fully loaded motor draw -
✔0.7
According to Nima standards, what size of starter would be used with a 6 hp three
phase motor at 230 V -
✔1
What utilization category is used for a contactor, frequently making and breaking lock
rotor current of a three phase squirrel cage motor -
✔AC-4
Which diagram represents a circuit, as it appears physically -
✔Wiring diagram
What letter or combination of letters issues with graph symbols to specifically the
function of a device -
✔Designation
What term is a symbol for wiring diagram? -
✔Connection diagrams
What do now or lines mean on a diagram? -
✔Control lines
What is the meaning of a diamond shaped symbol? -
✔A solid-state device
What does the designation letter X stand for? -
✔Reactors
What term is a synonym for schematic diagram? -
✔Elementary diagrams
What is the purpose of target tables? -
✔Show which contacts close, depending on the control device operating mode
What term designates the maximum recommended temperature of the air surrounding
the motor? -
✔Ambient temperature
The duty on a motor nameplate refers to the -
✔Ratio of the time during which the motor runs to the time during which the motor
is stopped
Which of the following enclosures protects the motor from liquids of entry angles up to
100° from vertical -
✔Splash proof
Which type of device is design with more reverse capabilities to allow interchangeability
-
✔Nema type devices
