IDA-101 Homework week 2

Most schematic diagrams are made up of

__________.

• series circuits

• parallel circuits

• series-parallel circuits

• none of the choices are correct

Schematic diagrams break the wiring of

control systems down into a(n) __________

arrangement.

• circuit-by-circuit

• series circuit

• individual circuit

• none of the choice are correct

What is the name of an appliance that is

used to remove moisture?

• humidifier

• dehumidifier

• gas furnace

• all of the appliances remove moisture

What is the position of the control switch if the window unit in Figure 6.14 is to operate the fan and compressor if the thermostat is closed?

• 4 and 1

• 4, 1, and 2

• 4, 2, and 3

• 4 and 3

True or False: The defrost timer motor operates continuously in Figure 6.18.

• true

• False

True or False: The evaporator fan motor is controlled by the defrost timer in Figure 6.18.

• true

• false

What electrical component initiates the defrost cycle of the commercial freezer shown in Figure 6.20?

• thermostat

• defrost timer

• defrost thermostat

• defrost heater

The thermostat of the commercial freezer in Figure 6.20 is connected in series with which of the following electrical devices?

• compressor

• condenser fan motor

• evaporator fan motor

• all of the choices are correct

If the temperature in the furnace schematic shown in Figure 6.25 were to increase to an unsafe condition, what electrical device would interrupt the power supply to the gas valve?

• fan switch

• heating thermostat

• limit switch

• all of the choices are correct

True or False: The system in Figure 6.28 is using a line-voltage control system.

• true

• false