Power Engineering Absa 3A2/3A2 questions with
accurate answers
_____ is often the first indication of a fire so automatic dectectors
should be used Ans✓✓✓ smoke
______ fires occur in the vapour airmixture over the surface of
flammable liquids Ans✓✓✓ class B
________ permits are used to cover specific hazards, these hazards
include extreme hazardous loction, radioactive material, polychlorinated
biphenlyns excavation and power supplies Ans✓✓✓ special
_______control operates to prevent errors from occurring in the first
place Ans✓✓✓ feedforward
a _____ is an excavation that is less than 3.7m wide at the bottom and
over 1.2m deep Ans✓✓✓ trench
a copper rod with the same dimensions as a steel rod will Ans✓✓✓
expand more for a given temp change
a diverting valve is a three way with ___ inlet and ____outlets
Ans✓✓✓ one, two
,a double seated balance valve could be described as Ans✓✓✓ passing
up to twice as much fluid as a single port valve, it generally divides the
flow in half through to control ports
A fuse link is sized so that the _____ the normal flow of current through
it is not sufficient to fuse or melt the metal. Ans✓✓✓ heat created by
a gate valve consists of a gate like_____ actuated by a screwed stem and
handwheel which moves up and down_____ the flow Ans✓✓✓ disc, at
right angles to
a material suitable for use as insulation should have which characteristic
Ans✓✓✓ transmits heat poorly
a process flow diagram shows which of the following Ans✓✓✓ major
equipment diagrams
major process flows
a rhombiod is a plane figure that had four sides with Ans✓✓✓ opposite
sides parallel and opposite angles equal
a substance is consiered to be a_____if it consists of diffrent elements or
compounds or both all of which retain there individual chemical
properties Ans✓✓✓ mixture
, advantage of a panel mounted alarm annunciator over computer moniter
displays Ans✓✓✓ operator can quickly recognize an alarm by its
location on the panel without scrolling
advantage of electrical valve operation includes Ans✓✓✓ set operation
from several diff locations
remote indicating devices can show position of the valves
can adjust valve operating speed from 2 secs to 4 mins
valve can be operated from a far distance
after construction the operations and engineering staff will use the
P&IDs as Ans✓✓✓ a reference and training materials on the details of
the processes and control systems
alloy steel is steel that has other elements added to it which tend to
increase its strenth ductility and resistance to what? Ans✓✓✓ corrosion
an absolute pressure gauge uses a ___ to sense the pressure Ans✓✓✓
bellows under a vaccuum
an important principle of ____is that equations must balance Ans✓✓✓
stoichiometry
accurate answers
_____ is often the first indication of a fire so automatic dectectors
should be used Ans✓✓✓ smoke
______ fires occur in the vapour airmixture over the surface of
flammable liquids Ans✓✓✓ class B
________ permits are used to cover specific hazards, these hazards
include extreme hazardous loction, radioactive material, polychlorinated
biphenlyns excavation and power supplies Ans✓✓✓ special
_______control operates to prevent errors from occurring in the first
place Ans✓✓✓ feedforward
a _____ is an excavation that is less than 3.7m wide at the bottom and
over 1.2m deep Ans✓✓✓ trench
a copper rod with the same dimensions as a steel rod will Ans✓✓✓
expand more for a given temp change
a diverting valve is a three way with ___ inlet and ____outlets
Ans✓✓✓ one, two
,a double seated balance valve could be described as Ans✓✓✓ passing
up to twice as much fluid as a single port valve, it generally divides the
flow in half through to control ports
A fuse link is sized so that the _____ the normal flow of current through
it is not sufficient to fuse or melt the metal. Ans✓✓✓ heat created by
a gate valve consists of a gate like_____ actuated by a screwed stem and
handwheel which moves up and down_____ the flow Ans✓✓✓ disc, at
right angles to
a material suitable for use as insulation should have which characteristic
Ans✓✓✓ transmits heat poorly
a process flow diagram shows which of the following Ans✓✓✓ major
equipment diagrams
major process flows
a rhombiod is a plane figure that had four sides with Ans✓✓✓ opposite
sides parallel and opposite angles equal
a substance is consiered to be a_____if it consists of diffrent elements or
compounds or both all of which retain there individual chemical
properties Ans✓✓✓ mixture
, advantage of a panel mounted alarm annunciator over computer moniter
displays Ans✓✓✓ operator can quickly recognize an alarm by its
location on the panel without scrolling
advantage of electrical valve operation includes Ans✓✓✓ set operation
from several diff locations
remote indicating devices can show position of the valves
can adjust valve operating speed from 2 secs to 4 mins
valve can be operated from a far distance
after construction the operations and engineering staff will use the
P&IDs as Ans✓✓✓ a reference and training materials on the details of
the processes and control systems
alloy steel is steel that has other elements added to it which tend to
increase its strenth ductility and resistance to what? Ans✓✓✓ corrosion
an absolute pressure gauge uses a ___ to sense the pressure Ans✓✓✓
bellows under a vaccuum
an important principle of ____is that equations must balance Ans✓✓✓
stoichiometry
