PHEP 33

Question 1

Automatic control systems

a) cannot accept responsibility for more than one point of the operation
b) can protect against all operating emergencies
c) cannot be used in combination with a manual system
d) are frequently used to control a specified sequence of operation

Answer 1

d) are frequently used to control a specified sequence of operation

Question 2

Manual control systems

a) are not suitable for controlling the operation of circuit breakers
b) are mainly used for controlling voltage regulation
c) are frequently used for on-off type functions
d) are never permitted to override an automatic system

Answer 2

c) are frequently used for on-off type functions

Question 3

In any system consisting of combination of manual and automatic control:

a) menus are generally provided for interlocking the various controls
b) the automatic functions may be bypassed when the switch is turned to manual
c) protective relay operation will take procedure over other types of operations
d) all above

Answer 3

d) all above

Question 4

Supervisory control systems differ mainly from other classes of control systems:

a) in the type of the protective relays used
b) in the manner in which commands and transmitted and received
c) in the type of control relays used
d) all three

Answer 4

d) all three

Question 5

Double transmission is an expression relating to supervisory controls and refers mainly to:

a) location
b) command
c) security
d) class

Answer 5

c) security

Question 6

In a typical supervisory control operation:

a) other
b) other
c) the first button pushed at the master station normally sets up the circuitry needed to receive the action order to follow
d) other

Answer 6

c) the first button pushed at the master station normally sets up the circuitry needed to receive the action order to follow

Question 7

The capacity of most supervisory control equipment is determined by:

a) the number of points provided
b) the size of the chaos
c) the type of communication channel used
d) the capacity of telemetering equipment

Answer 7

a) the number of points provided

Question 8

The reproduction at a convenient location measurements made at a remote point is called:

a) analog
b) telemetering
c) digital
d) PAM

Answer 8

b) telemetering

Question 9

In comparing the merits of analog telemetering with those of digital telemetering it would be correct to say:

a) other
b) other
c) other
d) undetectable errors can introduced at all points in the former but only at the sending end of the latter

Answer 9

d) undetectable errors can introduced at all points in the former but only at the sending end of the latter

Question 10

A general digital information handling system would most likely include the ability to:

a) convert solid-state signals to relay actions
b) convert analog signals to digital information
c) selectively read information which has been stored in memory
d) all three

Answer 10

d) all three