Nate Electrical Exam
What electro-mechanical control would you use on a cap tube or automatic expansion valve system to
maintain the space temperature?correct answerC: A thermostatic control
Open motors are designed to operate at a given temperature rise as indicated on the motor nameplate.
What does this mean?correct answerA: indicates the temp. rise over the surrounding air of a motor
when the motor is operating at full-load conditions
A voltmeter is connected into a circuit in which of the following ways?correct answerB: Parallel
A low pressure control is usually located on the:correct answerA: Condensing unit
A high pressure control is usually located on the:correct answerA: Condensing unit
The term "nominal voltage" refers to:correct answerD: The listed voltage
Which of the following is a safety control?correct answerB: High pressure control
Low voltage controls are usually designed to operate at no more than:correct answerA: 25 volts
A unit of power equal to one horsepower and delivered at the shaft of a motor is known as:correct
answerB: Brake horsepower
What is the purpose of the holding circuit in a magnetic motor starter?correct answerB: Holds the main
contacts closed until the control circuit through the interlock is broken.
On a magnetic motor starter, the alloy piece that causes the motor starter to open and shut off the
motor if too much motor current is drawn is called the:correct answerD: Trip armature
A set of contacts in a pressure control that close when the pressure increases arecorrect answerA: Direct
acting
Direct acting means "closes on rise". Contacts close on an increase
Which of the following control settings is typically non-adjustable?correct answerB: Range
Ohm's law states:correct answerA: E = IR
All else being equal, which of the following wire sizes will carry the most current?
A: 10 ga B: 14 ga C: 12 ga D: 18 gacorrect answerA: 10 ga
The run capacitor on a motor is used to:correct answerA: Increase torque
Doubling the voltage to a resistance will cause the power or watts to:correct answerC: Quadruple
What is impedance?correct answerA: Opposition to alternating current flow
How are fuses sized?correct answerA: By amperage C: By voltage
Capacitors are rated in:correct answerB: Microfarads C: Volts
What electro-mechanical control would you use on a cap tube or automatic expansion valve system to
maintain the space temperature?correct answerC: A thermostatic control
Open motors are designed to operate at a given temperature rise as indicated on the motor nameplate.
What does this mean?correct answerA: indicates the temp. rise over the surrounding air of a motor
when the motor is operating at full-load conditions
A voltmeter is connected into a circuit in which of the following ways?correct answerB: Parallel
A low pressure control is usually located on the:correct answerA: Condensing unit
A high pressure control is usually located on the:correct answerA: Condensing unit
The term "nominal voltage" refers to:correct answerD: The listed voltage
Which of the following is a safety control?correct answerB: High pressure control
Low voltage controls are usually designed to operate at no more than:correct answerA: 25 volts
A unit of power equal to one horsepower and delivered at the shaft of a motor is known as:correct
answerB: Brake horsepower
What is the purpose of the holding circuit in a magnetic motor starter?correct answerB: Holds the main
contacts closed until the control circuit through the interlock is broken.
On a magnetic motor starter, the alloy piece that causes the motor starter to open and shut off the
motor if too much motor current is drawn is called the:correct answerD: Trip armature
A set of contacts in a pressure control that close when the pressure increases arecorrect answerA: Direct
acting
Direct acting means "closes on rise". Contacts close on an increase
Which of the following control settings is typically non-adjustable?correct answerB: Range
Ohm's law states:correct answerA: E = IR
All else being equal, which of the following wire sizes will carry the most current?
A: 10 ga B: 14 ga C: 12 ga D: 18 gacorrect answerA: 10 ga
The run capacitor on a motor is used to:correct answerA: Increase torque
Doubling the voltage to a resistance will cause the power or watts to:correct answerC: Quadruple
What is impedance?correct answerA: Opposition to alternating current flow
How are fuses sized?correct answerA: By amperage C: By voltage
Capacitors are rated in:correct answerB: Microfarads C: Volts
