1. Timing relays are used for any application where the operating sequence requires a delay.
a. True
b. False
2. Pneumatic timers have good repeat accuracy.
a. True
b. False
3. Motor-driven timers are used where frequent starting of large motors is required.
a. True
b. False
4. A DC series relay is used as an adjustable resistor to vary the time.
a. True
b. False
5. Electronic timers have become increasingly popular in industrial applications.
a. True
b. False
Name: Class: Date:
Unit 9 Timing Relays
6. Nontimed contacts are controlled directly by the timer coil, as in a(n) ____ control relay.
a. industrial-type b. specific-purpose
c. motor-driven d. general-purpose
7. Timers that can be set for multiple functions or as off-delay timers generally plug into ____-pin tube sockets.
a. eight b. nine
c. eleven d. twelve
8. Off-delay timers must have power applied ____ to permit the timing circuit to operate.
a. instantaneously b. at all times
c. intermittently d. regularly
9. The exact timing value for any position within the timing range must be ____.
a. calculated with field data b. given by manufacturers
c. read from the panel d. found by trial and error
10. When there are several timers that meet the requirements of a given application, it is advisable to select the timer
with the ____.
a. smallest number of operating parts b. lowest cost
c. best reputation d. best support contract
Name: Class: Date:
Unit 9 Timing Relays