Deck 7: Signaling Systems

Question 1

A(n) ____ is a clock designed to drive some number of units that display the time.

A) alarm
B) watch program
C) master clock
D) atomic clock

Answer 1

C

Question 2

A ____ beam atomic clock is used to produce the pulses that are transmitted by the radio station WWV.

A) rubidium
B) cesium
C) francium
D) lithium

Answer 2

B

Question 3

The speed of the synchronous motor used to sense time is proportional to its number of poles and the ____-hertz line frequency.

A) 40
B) 50
C) 60
D) 70

Answer 3

C

Question 4

Briefly describe the activation of devices in a Jensen Electric Co. fire alarm system when a fire is detected.

Question 5

The Jensen Electric Co. fire alarm system uses a combination of smoke detectors and ____.

A) cameras
B) sensor microchips
C) manual pull handles
D) keys

Question 6

When a fire is detected by the Jensen Electric Co. fire alarm system, two alarm devices are activated: the paging system and the ____.

A) strobe light
B) controller
C) CCU
D) power supply

Question 7

The ____ system is used to provide automatic signals to signal the beginning and ending of shifts, lunch periods, and breaks.

A) master clock
B) program
C) fire alarm
D) atomic clock

Question 8

What signaling circuits are present in the industrial building?

Question 9

For a signal or voice to be heard, it should be at least ____ decibels louder than the surrounding noise level at the work station.

A) 5
B) 10
C) 15
D) 20

Question 10

A sound measured at 95 dB will be ____.

A) quiet
B) loud
C) very loud
D) uncomfortably loud

Question 11

The central control unit (CCU) of the fire alarm system manufactured by Jensen Electric Co. is a(n) ____.

A) mainframe computer
B) amplifier
C) master clock
D) desktop computer

Question 12

Describe the power supply to the processor of the Jensen Electric Co. fire alarm system.

Question 13

Quartz clocks are generally accurate to within one second per ____.

A) day
B) month
C) year
D) decade

Question 14

An LED located on the front cover of the smoke detector, manufactured by Whelan Engineering Co., flashes every ____ seconds to indicate the detector is in working order.

A) four
B) five
C) nine
D) ten

Question 15

If a display with a number larger than about 0.55 in. (14 mm) is desired, it will generally use a(n) ____ display.

A) planar gas discharge
B) LED
C) analog
D) fluorescent

Question 16

In the Jensen Electric Co. fire alarm system, a ____ LED indicates that a fire has been detected.

A) green
B) yellow
C) blue
D) red

Question 17

If the incoming ac power should fail, ____ batteries continue to provide power to the Jensen Electric Co. fire alarm system.

A) lithium
B) lead acid
C) alkaline
D) nickel cadmium

Question 18

What is the name of the tone produced by the paging system that repeatedly ascends from low to high?

A) WHOOP
B) HI-LO
C) WAIL
D) HORN

Question 19

When selecting a paging system, what five factors should be taken into consideration?

Question 20

How does the master clock in the industrial building sense time?