Lesson 14. Introduction to traffic signal cabinets and equipment Questions and Answers 100% Solved

Lesson 14. Introduction to traffic signal
cabinets and equipment

In 1976, ? released a set of traffic signal standards known as TS-1.
a. NCSHS
b. NECA
c. NEMA
d. NTSB - answerc. NEMA

What device in the cabinet switches the 120 VAC output to the signal heads?
a. load switches
b. phase switches
c. signal switches
d. transfer switches - answera. load switches

All of the traffic signal components are housed in a weather tight cabinet. - answerTrue

A Type 2 controller cannot be used in a TS-1 cabinet. - answerFalse

The two categories of AC and DC voltage levels are input voltage and ? voltage.
a. control
b. device
c. output
d. signal - answerc. output

The most popular method for vehicle detection is a(n) ? .
a. inductive loop detector
b. magnetic detector
c. magnetometer
d. pressure pad - answera. inductive loop detector

A flash ? relay is used to switch the signals from a normal operating condition to a
flashing condition.
a. actuation
b. sequence
c. transfer
d. transition - answerc. transfer

The key to the success of the 170 controller is that it specifies which ? to use.
a. cable interface
b. control voltage
c. microprocessor chip