Test Questions Part 4 Flashcards
Electric arc temperatures may be as high as:
4250°C
5325°C
7450°C
8300°C
8300°C
Cast iron boiler capacity:
Is very large compared to steel boilers
Can be increased by simply adding sections
Cannot be increased once assembly is completed
Can be increased by increasing section size
Can be increased by simply adding sections
A “U” tube manometer may be filled with:
A granular substance
Nitrogen
Ethyl alcohol
Light oils
Light oils
Electrical power can be determined by the formula:
P = E x I
P = E x R/I2
P = I x R x E
P = I x R
P = E x I
Increasing the spring tension in a pressure reducing valve will ___________________.
Reduce or minimize the cycling or “hunting” of the valve
Decrease the regulated pressure downstream of the valve
Allow for maintenance to be completed downstream
Increase the regulated pressure downstream of the valve
Increase the regulated pressure downstream of the valve
When is hot oil an ideal heat transfer fluid?
when high temperature process fluids are needed at low pressure
when high temperature, high pressure process fluids are needed
when glycol is too expensive
when low temperature process fluids are needed at high pressure
when high temperature process fluids are needed at low pressure
Which of the following affects the electromotive force developed by a DC generator?
Acceleration rate at which the conductors cut the magnetic lines of force
The diameter of the conductors
The type of conductors cutting the magnetic lines of force
The strength of the stationary field
The type of conductors cutting the magnetic lines of force
Putting a controller on manual control means:
The operator controls the final control element.
The controller output responds to a process variable.
There is no control of the final control element.
The operator manually adjusts the process by changing the process variable signal
The operator controls the final control element.
Which of the following would be used to reduce the temperature gradient in order to attain a slower cooling rate of a weld?
preheating the heat affected zone
air cooling the weld
quenching the component in water
post-heat the welded area
preheating the heat affected zone
A grease trap works on the principle that:
greases and water cannot mix.
centrifugal force can be used to enhance precipitation of greases.
greases with low relative density will float on the surface of water.
slow moving fluid streams allow the mixtures to separate.
greases with low relative density will float on the surface of water.
The capacity of a body to do work is defined as:
Energy
A PLC with an HMI can signal an alarm by: (choose all that are correct)
Sounding a siren or horn
operating a beacon
Flashing an equipment icon on the HMI screen
Turning the HMI screen a different colour
Sounding a siren or horn
Flashing an equipment icon on the HMI screen
Turning the HMI screen a different colour
Question 2
When decommissioning a plant,
all waste must be disposed of.
the ground must be left in a non-toxic state.
a groundwater impact survey must be done.
the site must be left in a condition suitable for an alternative use.
the site must be left in a condition suitable for an alternative use.
Plastic foam pipe insulation is:
Used for high temperature service on elbows
Used for refrigeration piping only
Used for lower temperature purposes
Often installed by the welders
Used for lower temperature purposes
Which of these groups is the combustible components of coal?
Nitrogen, oxygen, ash
Carbon, hydrogen, sulphur
Carbon dioxide, nitrogen, sulphur dioxide
Carbon, ash, nitrogen
Carbon, hydrogen, sulphur
