Power Engineering Absa 3A2/3A2
UPDATED ACTUAL Questions and
CORRECT Answers
the purpose of a frequency meter - CORRECT ANSWER - indicate the frequency of the
power being induced
the prevent freezing of an industrial firewater system a safe rule to follow is ensuring the top of
the pipe is burried not less than_______ below the lowest frost line - CORRECT
ANSWER - 0.3m
on/off control the final control element is either ____ positive or _____negitive - CORRECT
ANSWER - 100%, 100%
some characteristics of the series DC motor include - CORRECT ANSWER - small
current at no load conditions
danger of overspeed if the load is removed
the load current equals the exitation current
advantage of a panel mounted alarm annunciator over computer moniter displays - CORRECT
ANSWER - operator can quickly recognize an alarm by its location on the panel without
scrolling
_____ is often the first indication of a fire so automatic dectectors should be used - CORRECT
ANSWER - smoke
controlling the identified indirect cause of workplace accidents or incidents is normally long
term development process involving____ measures or system changes - CORRECT
ANSWER - preventitive
, CSA-b51 a pressure vessel installed in a closed hot water system or cooling system provided a
pneumatic cushion or the expansion of water is called - CORRECT ANSWER - a cushion
tank
iron or constantan ca be used in a thermocouple to measure a temp range of - CORRECT
ANSWER - -210 to 1200
difference between the set point and the actual procces variable is known as offset and is a
charecteristic of___ controllers - CORRECT ANSWER - Proportional only
if an___ generator looses exitation the rotor accelerates and it operates as an induction generator
running above ____ speed - CORRECT ANSWER - synchronous, synchronous
a double seated balance valve could be described as - CORRECT ANSWER - passing up
to twice as much fluid as a single port valve, it generally divides the flow in half through to
control ports
in a thermostatic trap the bellows are usually filled with - CORRECT ANSWER - alcohol
symbol for flux density is______ and the symbol for mag flux is____ - CORRECT
ANSWER - B, o with a line through it
formulas under asme bpvc section 1 power boilers 27.2.2 the value t represents - CORRECT
ANSWER - minimum thickness of metal
a gate valve consists of a gate like_____ actuated by a screwed stem and handwheel which
moves up and down_____ the flow - CORRECT ANSWER - disc, at right angles to
The process of non-catalytic removal of NOx is the addition of _____ to the flue gas -
CORRECT ANSWER - Ammonia
UPDATED ACTUAL Questions and
CORRECT Answers
the purpose of a frequency meter - CORRECT ANSWER - indicate the frequency of the
power being induced
the prevent freezing of an industrial firewater system a safe rule to follow is ensuring the top of
the pipe is burried not less than_______ below the lowest frost line - CORRECT
ANSWER - 0.3m
on/off control the final control element is either ____ positive or _____negitive - CORRECT
ANSWER - 100%, 100%
some characteristics of the series DC motor include - CORRECT ANSWER - small
current at no load conditions
danger of overspeed if the load is removed
the load current equals the exitation current
advantage of a panel mounted alarm annunciator over computer moniter displays - CORRECT
ANSWER - operator can quickly recognize an alarm by its location on the panel without
scrolling
_____ is often the first indication of a fire so automatic dectectors should be used - CORRECT
ANSWER - smoke
controlling the identified indirect cause of workplace accidents or incidents is normally long
term development process involving____ measures or system changes - CORRECT
ANSWER - preventitive
, CSA-b51 a pressure vessel installed in a closed hot water system or cooling system provided a
pneumatic cushion or the expansion of water is called - CORRECT ANSWER - a cushion
tank
iron or constantan ca be used in a thermocouple to measure a temp range of - CORRECT
ANSWER - -210 to 1200
difference between the set point and the actual procces variable is known as offset and is a
charecteristic of___ controllers - CORRECT ANSWER - Proportional only
if an___ generator looses exitation the rotor accelerates and it operates as an induction generator
running above ____ speed - CORRECT ANSWER - synchronous, synchronous
a double seated balance valve could be described as - CORRECT ANSWER - passing up
to twice as much fluid as a single port valve, it generally divides the flow in half through to
control ports
in a thermostatic trap the bellows are usually filled with - CORRECT ANSWER - alcohol
symbol for flux density is______ and the symbol for mag flux is____ - CORRECT
ANSWER - B, o with a line through it
formulas under asme bpvc section 1 power boilers 27.2.2 the value t represents - CORRECT
ANSWER - minimum thickness of metal
a gate valve consists of a gate like_____ actuated by a screwed stem and handwheel which
moves up and down_____ the flow - CORRECT ANSWER - disc, at right angles to
The process of non-catalytic removal of NOx is the addition of _____ to the flue gas -
CORRECT ANSWER - Ammonia
