Timer relays are similar to other control relays in that they use a(n) ____________________ to control the operation of some number of contacts.

Figure 15-6 In the accompanying diagram, the circuit is designed to control the operation of a(n) ____________________.

Figure 8-2 Based on the accompanying figure, what happens to the three load contacts connected between the three phase power line and the motor after either START button is pressed?

In a circuit in which three motors turn off in sequence, an overload on any one motor will not have an effect on the other motors.

Most ladder diagrams show coils connected in parallel.

The ____________________ gauge is ideal for measuring the level of turbulent, aerated, solids-laden, viscous, corrosive fluids.

In the bubbler system, a(n) ____________________ is used to adjust the maximum air flow.

What do electronic timers use as the time base?

A(n) ____________________ switch can sense small pressure changes at low pressure.

Figure 12-4 The circuit shown in the accompanying figure permits ____________________ motors to start in sequence.