Pumps and Piping Test 3
Tapped holes used with screwed-in eye-bolts should have a minimum depth of ____ times the bolt diameter
1 1/2
The capacity range of come-alongs is ____ tons
1/2 to 6
Custom-fabricated spreader and equalizer beams should be tested at ____ percent of their rated capacity
125
A chain sling should be discarded if any portion of the chain is worn by ____ percent or more
15
OSHA requires that a hook be replaced if the throat has opened ____ percent or more from its original size
15
The pressure-relief (safety) valve used with a low-pressure steam boiler will discharge steam at a pressure of about ____ psi
15
One psi is equal to ____ inches of water column
27.72
If design pressure for a new installation is 200 psi, the hydrostatic test pressure is ____ psi
300
A hook that is point-loaded can carry about ____ percent of the rated load
40
The amount of latent heat released when 5 pounds of steam condenses to water at sea level is ____ Btus
4850
When testing a drain pipe in a high-rise structure, test only ____ feet at a time
50
The amount of latent heat required to change one pound of water to steam at sea level is ____ Btus
970
Which of the following is NOT a common cause of cavitation?
A blocked discharge pipe
Thermostatic traps are used at the outlet of each terminal unit in ____
A two-pipe steam system with a gravity return
Steam boilers ____
Are partially filled with water
A strainer should be installed ____
Before the steam trap
In the steam cycle, water is evaporated in the ____
Boiler
When removing a pump from a system, ____ each pipe as it is disconnected
Cap or seal
Installing new impeller rings requires the installation of new ____
Case rings
Dredging and other marine work requires ____ slings because they withstand corrosion better
Chain
In reciprocating valves, the fluid is kept moving in one direction by the ____
Check valves
Metering pumps pump exact amounts of fluids because of ____
Close tolerances
Conductivity tests use amperage to find flaws in ____ of pipe
Coatings
Always follow ____ for lockout and tagout procedures
Company policy and procedure
Three basic types of cracks can occur in weld metal: transverse, longitudinal, and ____
Crater
The term D/d ratio refers to the relationship between the sling and the ____
Diameter of the surface the sling is wrapped around
In the diaphragm pump, the connecting rod runs between the diaphragm and a(n) ____
Eccentric
As part of the pretest field inspection of a piping system, ____
Ensure that all equipment not to be tested is locked and tagged out
To level loads when the legs of a sling are unequal, a(n) ____ can be used
Equalizer plate
A one-handed signal that is given with the fist in front of the body and the thumb pointing toward the signaler's body means _____
Extend the boom
Mixing rigging hardware of different lifting capacities is okay, as long as the capacity of one of the hardware items exceeds the weight of the load
False
Screw-type plate clamps are used for vertical lifting of plates only
False
The ratchet jack can lift heavier loads than the screw jack or hydraulic jack
False
The borescope most commonly used by industrial mechanics is the ____ borescope
Flexible
A common type of valve used to turn on or shut off the flow of steam is a ____ valve
Gate
In the steam cycle, condensation occurs mainly in the ____
Heat exchanger
The latent heat of condensation is the ____
Heat given up by steam in changing back to water
The pressure gauge in a test should be connected directly to the ____ of the system or component
High point
Positive-displacement pumps are used to pump ____ liquids
High-viscosity
The gear pump is used mainly in ____ systems
Hydraulic
The most useful general-purpose jack is the ____ jack
Hydraulic
The part of a centrifugal pump that increases the speed of the fluid is the ____
Impeller
Foreign matter trapped in a weld metal is called a(n) ____
Inclusion
Which of the following will NOT correct cavitation?
Increasing the flow rate
Any time a pump becomes excessively noisy or starts vibrating, you should ____
Inspect it for malfunctions
If a change occurs in a pump's performance, it should be ____
Inspected to determine the reason
Field pretest inspections may be written up as a(n) ____
Inspection punchlist
A steam trap that has only two moving parts is a(n) ____ trap
Inverted bucket
In plunger pumps, the plunger is ____ the stroke
Longer than
Centrifugal pumps are basically ____ pumps
Low-pressure
Head pressure tests are performed on ____
Low-pressure systems
In a hydrostatic test it is best to fill the system from the ____
Lowest point
When the signal person gives the dog everything signal, the operator is expected to ____
Make no machine movement
Temperature readings of the pump bearings should be compared to the ____
Manufacturer's specifications
One of the slings best suited for situations where the load is abrasive, hot, or tends to cut is a ____ sling
Metal mesh
In a pneumatic pressure test, connections are checked for leaks with a ____
Mix of soap and water
To perform a service test, close the last valve in the system and turn on the service to that system at ____
Normal operating pressure
It is commonly considered good practice to install new ____ as any unit is being reassembled
O-rings and gaskets
In helical screw gear pumps, the center rotor drives ____
One or more idler rotors
Using chemicals to clean pipe systems is sometimes called ____
Pickle and passivate
Cleaning a system can be done by ____
Pigging
The three types of reciprocating pumps are ____
Piston, plunger, and diaphragm
A multistage centrifugal pump increases the speed of the fluid until the desired ____ is reached
Pressure
The shell surrounding the shaft, bearings, packing gland, and impeller of a centrifugal pump is the ____
Pump casing
In order to remove the rotating element, the ____ must be separated
Pump casings
Some pump bearings are equipped with oiling systems that use gear-type oil pumps. These units will require that the reservoir and pump be ____ during assembly
Removed
The pump in a hydraulic system would be a ____ pump
Rotary
The problem of wear in slurry pumps is solved by ____
Rubber lining or hardened metal
Slings are attached together using ____
Shackles
Ultrasonic examination can be used to detect ____
Shrinkage cavities
If it is apparent that the crane operator has misunderstood a hand signal, the signal person should ____
Signal the operator to stop
As a minimum requirement, each pressure gauge must be calibrated every ____
Six months
A mixture of solid particles suspended in fluid is a ____
Slurry
Long loads are supported during lifting operations with ____
Spreader beams
The most common type of impeller used in gear pumps is the ____
Spur gear
A device that purges the system of condensate and gases without releasing steam is a ____
Steam trap
Heat exchangers used in steam systems are usually ____ heat exchangers
Steam-to-water
In external gear pumps, the direction of the drive shaft rotation determines the ____
Suction port
All pumps take in fluids from the ____
Suction side
The total heat of steam is the ____
Sum of the sensible heat and latent heat of steam above 32 degrees
Magnetic particle tests are sensitive to ____
Surface and near-surface flaws
Arc strikes are small, localized points where ____ occures away from the weld
Surface melting
Liquid penetrant tests detect ____
Surface openings
To perform a flow test, check for leaks with the ____
System in operation
A(n) ____ is used to keep the load under control
Tag line
A pyrometer can be used to check the ____ of a pump
Temperature
Pretest requirements include identifying _____
Test boundaries
Applicable codes are indicated on the ____
Test report
Which of the following statements about a compound block and tackle is correct?
The more sheaves the blocks have, the greater the load capacity
All of the following are true EXCEPT
The size of the shackle is determined by its pin size
Which of the following statements about lifting lugs is correct?
They are used primarily for vertical lifts, but some are also used for angled lifts if so designed
The procedure used by industrial maintenance mechanics to determine to determine what is wrong with a pump is ____
Troubleshooting
When the problem has been diagnosed, the ____ can quickly suggest a possible cause and solution
Troubleshooting chart
One of the nuts on one side of the impeller will usually have left-handed threads so that the rotation of the shaft helps to keep it tight
True
A chopper impeller would be unsafe in a system containing ____
Unstable fluid
Low-pressure steam boilers operate at pressures ____
Up to 15 psi
What action is signaled by tapping your fist on your head, then using regular hand signals?
Use main hoist
Both light beams and ultrasound beams are ____
Waves
Shaft runout should be measured with a ____
dial indicator
The safe working load of a rigging hook is accurate only when the load is suspended from the _____ of the hook
saddle
