Oilers/Plant Tenders (HHC) Civil Service Exam
At intervals carbon deposits are washed out of the air compressor of a diesel-driven installation by using _________
A solution of soap and water fed through the lubricator
An oiler, in swabbing the piston rods of a small duplex direct-acting pump, is found to be doing this too often. The MOST probable disadvantage is _________
A waste of time and oil
Lubricants in a diesel engine perform all of the following functions EXCEPT __________
Acting as a vibration absorber
In normal operation, the lubricating oil in a steam turbine will NOT _________
Affect the leaving steam
The BEST location for the atomizer feeding oil to a steam engine cylinder is ________
After the steam throttle valve
Oxidation of lubricants usually requires the presence of _________
Air
On he suction stroke of a four-stroke cycle full diesel engine, ___________ drawn into the cylinder.
Air only is
The letters AGMA, used when referring to a gear lubricant, are an abbreviation for the __________
American Gear Manufacturers Association
Electric current is measured in __________
Amperes
Whenver possible, it is BEST to remove a gear from a shaft by means of _________
An appropiate wheel puller
Graphite is a form of __________
Anthracite Coal
Stern-tube lignum-vitae bearings __________
Are made with strips of lignum-vitae inserted in longitudnal grooves in the interior of bearing shell
A crankcase explosions in an internal combustion engine _________
Are preventable by keeping air out of the crankcase when practicable
Fires or explosions in air compressor systems _______
Are prevented by using low flash point oils
An oiler who is working on a repair job which has to be EXPEDITED is working on a job that must be done _________
As quickly as possible
The procedure to follow in the lubricantion of the machinery aboard ship is to lubricate _________
At regularly scheduled intervals
Of the following statements concerning torque equipped machines, the one which is MOST NEARLY CORRECT is that ___________
At stall conditions, the engine is putting out its maximum power
The MOST economical and effective method to get lubricating oil into a horizontal superheated steam reciprocating engine is to __________
Atomize the oil into the steam at the steam inlet
In the lubrication of the steam cylinder of a marine reciprocating steam engine,the lubricant MUST _________
Be atomized by the steam
In a typical lube-oil system aboard ship, the oil purifier is usually located __________
Below the overhead settling tank
In a force feed lubricating system for marine engines, the temperature, in degrees Fahrenheit, of the oil leaving the cooler SHOULD BE, most nearly, ________
Between 90 and 115
Reduction of ring wear in an engine is one of the jobs of a lubricant. The MOST modern method of measuring ring wear is ___________
By use of radioactive rings
The parts of the valve in the poppet valve engine that require lubrication are the __________ guide.
Cam and tappet mechanism and the valve steam
In the reciprocating steam engine, the piston-type steam valve _________
Can be operated under high steam pressures
Water for lubricating purposes __________
Can be used for certain types of bearings
The type of fire extinguisher that SHOULD be used in fighting an electrical fire is __________
Carbon Dioxide
Excessive lubrication of diesel cylinders may cause ___________ in the cylinders.
Carbon deposits
The equipment commonly used to sperate heavy liquids from the lighter liquids is called a _________
Centrifuge
The one of the following that is NOT a method for removing contaminants from oil is __________
Centripeting
A valve that allows oil to flow in one direction only is GENERALLY called a __________ valve.
Check
A valve that allows oil to flow in one direction only is generally called a _________ valve.
Check
The valve that allows oil to flow in one direction only is commonly know as a _________ valve.
Check
When the head of a cold chisel becomes mushroomed, it is advisable NOT to use it because __________
Chips might fly from the head
Of the following, the one that is a good surface color for the commutators and slip ringsof electricla generators is _________
Chocalate brown
A fuse in an electric circuit has the SAME function as a __________
Circuit breaker
Of the following, the one procedure which is NOT recommended in caring for a steam turbine is to _________
Clean oil strainers regularly, usually bi-monthly
When the oil pressure suddenly increases in a lubricating line to a bearing, the ONE of the following faults which would MOST GENERALLY cause this is:
Clogged strainers
The oil the is USUALLY used for lubricating the cylinder and piston of an operating steam engine is a __________ oil.
Compounded
The TWO general classes of oils that are used to lubricate steam engines are ________
Compounded and mineral
A considerable amount of water in the crankcase of a gasoline engine would NOT be likely due to _________
Condensation
Water GENERALLY enters a diesel lubricating oil system because of __________
Condensation of combustion products
Aftercoolers are put on MOST air compressor installations to __________
Condense Moisture from Compressed Air
The shape of the bottom of an overhead gravity supply oil tank should be _________
Conical
In the common rail system of solid fuel injection in a diesel engine, a control wedge is generally used to ____________
Control the lift of the mechanically operated spray valve
The one of the following metals that is non-ferrous is __________
Copper
Mineral oils are USUALLY refined from _________ products.
Crude Petroleum
Oil coolers SHOULD be ___________
Cut in after oil pumps have been started
On most diesels there are two separate and distinct lubricating systems designated as the high and low pressure systems. The high pressure system is generally ised to lubricate the ___________
Cylinders
The relationship between lubricating oil viscosities and temperature is that the viscosities
Decrease with a Temperature Increase
The property of a lubricant that a Saybolt viscosimeter measures is called the
Degree of fluidity
A mechanical force feed lubricator on a steam engine _________
Delivers oil in prportion to engine speed changes
The one NOT considered in determining characteristics of air compressor oils in _________
Dew point
When the ignition charachteristics of a fuel are represented by a cetane number, the fuel is NORMALLY used in a __________
Diesel engine
Flitering oil through cotton waste, felt, or cloth filters ________
Does not remove excess water from oil
For digging open cuts, drainage ditches, and gravel pits, where the material is to be moved from 20 to 3,000 feet before dumping, one would use a __________ Excavator.
Drag-line
Some of the major parts of a typical pressure oiling system, as found in an engine room, are:
Drain tanks, pumps, coolers, and strainers
A test of grease that identifies greases and indicates uniformity in their manufacture is known as the __________ test.
Dropping-Point
On reciprocating engines, __________
Emulsified lubrication is desired and planned for
The purpose of the seals that close the small openings between shafts in machinery, and the housings through which they extend, is to __________
Exclude dirt and prevent the escape of lubricant
T/F A centrifuge is USUALLY used to filer the recirculating oil in a pressure lubricating oil system.
F
T/F A drip-feed lubricator is generally regulated by the size of the wick or the number of strands to be used in the wick.
F
T/F A gravity type lubricator USUALLY feeds oil to the piston rod of a steam engine in direct proportion to the speed of the engine.
F
T/F A tandem-compound engine is one in which the cylinders are USUALLY placed side by side.
F
T/F Adjusting the gland nuts on a pump is preferably done while the pump is not running.
F
T/F An OS&Y globe valve is one having an inside screw, non-rising spindle.
F
T/F An oil that can mix with water is USUALLY used to operate the hydraulic cylinders of turbine governors.
F
T/F Combustible and flammable cleaning materials should NOT be stored in tightly closed metal containers.
F
T/F Engine oils that are usually used in steam engine external bearings are USUALLY medium-quality, light and medium-bodied oils, and are suited for use in splash circulating systems.
F
T/F Hand oiling is USUALLY done with a lower viscosity oil than what us used in automatic lubricating systems.
F
T/F If 200 feet of a certain size pipe weighs 300 lbs., 60 feet od the same pipe will weigh 100 lbs.
F
T/F In a piston type pump, the plunger moves back and forth in a packing gland instead of in a bored cylinder.
F
T/F Low-viscosity lubricants are BEST adaptable for low-speed machines.
F
T/F Lubricants that resist the washing action of wet steam in engine cylinders are usually made by compunding mineral oils with graphite.
F
T/F Mineral oils can be manufactured from cotton seed products.
F
T/F Most grease cups operate by means of a spring pressure.
F
T/F Oil is USUALLY used to lubricate the bearings of a modern crtrifugal blower (such as an air conditioning blower unit).
F
T/F Oils used for air compressor lubrication should contain APPROXIMATELY 40% dark cylinder oil.
F
T/F On a compound gage, a reading of 20 inches of vacuum indicates APPROXIMATELY a vacuum pressure of 15 psi.
F
T/F Packing in a centrifugal or reciprocating pump MUST be installed to completely stop leakage.
F
T/F Preventive maintenance implies that equipment MUST be checked whe the work load is low.
F
T/F S.A.E. 30 oil is USUALLY the proper viscosity oil to use for meachinery bearings operatinf in 25°F temperature.
F
T/F Small turbine bearings are USUALLY lubricated by means of sight feed drop oilers.
F
T/F Strainers used in a lubricating oil system will USUALLY remove water and foreign particles out of the circulating oil.
F
T/F The carbonizing og oil under the action of high temperature improves the lubricating qualities of the oil.
F
T/F The color of lubricating oil USUALLY indicates its quality.
F
T/F The decimal 0.875 written as a fraction would be 15/16.
F
T/F The grooves often found in plain sleeve bearings are USUALLY deep grooves with vertical sides.
F
T/F The hydrostatic lubricator is USUALLY driven by a reciprocating part of the machine it lubricates.
F
T/F The hydrostatic lubricator is USUALLY used to introduce lubricant into the oil cylinder of a fuel oil pump.
F
T/F The joints of split packing rings are USUALLY spaced in a stuffing box 120° apart.
F
T/F The moisture content of refrigeration oil is USUALLY high.
F
T/F The operating temperature of the lubricating oil usde in the bearings of a steam condensing engine is USUALLY about 200°F.
F
T/F The piston rods are of a duplex directacting feedwater pump are generally lubricated by means of a bottle oiler.
F
T/F The proper handling and storage of lubricants in power plants is USUALLY of minor importance.
F
T/F The proper rate of oil feed to a steam cylinder which has a 10-inch diameter piston is APPROXIMATELY one pint per day.
F
T/F The specific gravity of a lubricant is usually measure by means of a Saybolt visosimeter.
F
T/F The temperature at which an oil will aporize and burn is commonly know as the pour point of the oil.
F
T/F The uniflow steam engine utilizes separate exhaust valves the head end and crank end.
F
T/F The viscosity of an oil used for gear lubrication is NOT very important.
F
T/F The worm and gear assembly unit of an elevator hoisting machine is USUALLY covered completely with oil for smooth operation.
F
T/F Wool waste is sometimes placed in oil cups to act as a feed in order to incease the frequency of oiling.
F
A common method used to determine when an accessible bearing is running too hot is to _________
Feel the bearing
A lubricating oil made from either animla, vegetable, or fish is GENERALLY known as a(n) _________ oil.
Fixed
The device that feeds oil in direct porportion to the speed of a steam engine is called a _________ lubricator.
Foced Feed
Of the following, the MOST important requirement of a refrigerator lubricant is that it have __________
Freedom from Water
Of the following makes of power plants for cranes, the one which uses diesel fuel is the __________
G.M. 4055-C
The AMOUNT of oil distributed by a ring oil bearing _________
Gets less as the temperature of oil increases
Of the following types of bearings, the one which is NOT commonly used in most electric motors is _________ bearing.
Gibbs thrust
Of the following the lubricants, the one which is USUALLY NOT attacked by acids is __________
Graphite
Of the following, the one method of lubrication which is NOT commonly used for an encased chain drive is _________ lubrication.
Gravity tank
When lubrication is required for a modern centrifugal blower, as in an air conditioning blower unit, __________
Grease is usually used
In 2-cycle and 4-cycle engines, the quantity of lubricating oil used is _________
Greater in the 2-cycle engine than the 4-cycle engine
The camshaft operating the valves of a 4-stroke cycle diesel engine rotates at __________ speed of the crankshaft.
Half the
The physical appearance of a grease with a consistency number of four is MOST NEARLY _________
Hard
The oil cooler for a steam turbine should _______
Have an oil pressure greater than the water pressure
Collar thrust bearings __________
Have oil introduced at the periphery of the shaft between collars
To do a satisfactory lubricating job, a turbine oil must __________
Have the proper viscosity
A good program of preventice maintenance would NOT require __________
Having the work done on an off shift
In a diesel engine the fuel is ignited by means of the __________
Heat of compression
A "shrink fit" collar is to be removed from a shaft. One good way to do this would be to drive out the shaft after __________
Heating the collar only
In a centrifuge, _________
Heavy liquids are separated from lighter liquids
Centrifugal purifiers are generally used to separate __________
Heavy liquids from light liquids
The one of the following that is NOT an anti-friction bearing is the __________ bearing.
Helical
The temperature of circulating water in a diesel engine cylinder jacket is kept within the prescribed limits beacuase _________
High temperatures cause pounding
In a 4-stroke cycle full diesel engine, the fuel is ignited by means of ___________
Highly compressed air in the cylinder
In a 4-stroke cycle full diesel engine, the fuel is ignited by means of ____________
Highly compressed air in the cylinder
"Additives" are sometimes added to lubricating oil __________
Hold to a minimum the oxidation of the oil
The specific gravity of lubricating oil is USUALLY measured by means of a __________
Hydrometer
The specific gravity of lubricating oils is USUALLY measured by means of a __________
Hydrometer
In gear lubrication, ___________
Immersion fo gear teeth causes sudden increase in temperature of lubricant
Lubricating oil coolers are USUALLY installed in pairs and operated so that pressure ________
In the oil side is greater than that in the water side
Of the following actions, the on which is LEAST advisable to follow in the event that the temperature of a bearing to increase above normal, is to __________
Increase the supply of oil by increaseing oil temperature
The eccentrics on compound marine steam engine are lubricated by __________
Individual cups on the eccentric rods
In operation, a gasoline driven air compressor is said to be unloaded when the __________
Inlet valves on the air compressor are held in the open position
The time required to cut off a 1" diameter rod, 6" long, from a length of stock, is LEAST affected by the _________
Length of the rod
A well-established lubricating program aboard ship usually results in _________
Less work for the engine and maintenance crews
In general, light-bodied oils are MOST suitable for _________
Light loads at high speeds
The chassis grease recommended for MOST pieces of construction equipment is generally __________
Lime base-water resistant
Of the following oils, the one which is generally considered useless as a lubricant is _________ oil.
Linseed
Ice machine cylinder oils differ from engine oils in that the ice machine cylinder oils must be __________
Low-pour test oils
Speed reduction gears which operate exposed require _________
Lubricants of heavier body than those which are tightly encased
A lubricant for a bearing, if properly selected and used, will do at LEAST the following:
Lubricate, clean, and cool the bearing
A turbine driven generator is equipped with a pressure lubricator and a hand operated oil pump. This arrangement is advisable so that _________
Lubrication is available on starting
The precaution, or precautions, that an oiler must take when he is using absorbent type lubricating oil filters is to __________
Make Sure that the Particular Oil Additives are not Removed by the Filter
A lttle oil in compressed air leaving low-pressure cylinder and going to the high pressure cylinder of a multi-stage air compressor ________
May be dangerous in the high pressure cylinder
Large diesels of the crosshead type usually have their cylinders lubricated by___________
Mechanical force feed lubricators
Internal or cylinder lubrication of reciprocating steam engines can be accomplished BEST by means of __________
Mechanical force feed oiler
In reference to air controlled machines operating in mid-winter, the reservoir of the antifreezer or evaporator should be filled with __________
Methyl alcohol
The LARGEST class of lubricants in common use is __________
Mineral Oil
In a stationary diesel engine, a grade of lube oil is selected based PRINCIPALLY on ________
Minimizing carbon deposits between rings
Of the following, a good lubricant should ALWAYS possess _________
Minimum impurities
The one of the following measures that is commonly used to represent a rate of oil feed is drops per ________
Minute
The MOST important precaution to take in giving first aid to a severely injured man when there is a possibility of broken bones is to __________
Move him no more than is absolutely necessary and call a doctor
The most important precaution to take in giving first aid to an injured man, in case of sever injury and where there is a possibility of broken bones, is to __________
Move him no more than necessary and call a doctor
Anti-friction bearings:
Need very little attention
The one of the following that os NOT the identification of a type of gear is a __________ gear.
Needle
The one of the following signs that would indicate that the oil supply passage to a hydraulic lifter on a diesel engine is plugged up is __________
Noise from the affected valve
The one of the following types of oils MOST preferred for the hydraulic govenor of a reciprocating steam engine is __________ oil.
Non-Additive Turbine Type
While under way, the sight glass shows that no oil is flowing to the main bearings of a turbine. In this case, you immediately tell your supervisor about it so that he may FIRST __________
Notify the bridge
In a 6 x 19 Seale wire rope, the wires in one strand are __________
Of different diameters
The oil pressure gage of a diesel engine lubrication system shows a high reading. This may be due to _______
Oil gage out of adjustment
The property of a lubricant the allows it to adhere to metallic surfaces is known as ________
Oiliness
Spontaneous fires are usually caused by poor ventilation and exposed __________
Oily rags
Spontaneous ignition is USUALLY caused by the combination of poor ventilation and a pile of __________
Oily waste
A 300 horsepower stationary diesel engine running at full load for an hour uses a quantity of lube oil equal to about __________
One gallon
Ina common two-part journal bearing, __________
One groove lengthwiase at the top of the bearing is preferred to three circmferential grooves around the bearing
The one of the following activities that need NOT be performed before starting a forced draft fan unit has been shut down for some time is to __________
Open up the suction air valve
The neutralization number of an oil is an indication of its __________
Organic or Mineral Acidity
The objective in the use of applicaors for wire-rope lubrication is to apply a smooth even film at a temperature conducive to the __________
Penetration of the wire strands
An engine indicator is an instrument that is used on a reciprocating engine to determine the __________ the engine.
Performance of
Of the following, the grease that does NOT contain any soap base is __________
Petroleum
For lubrication of valve stems and pstion rods, on SHOULD USE _________
Practically no oil at all
In modern practice, the method by which turbine-generator reduction gear surfaces NORMALLY recieve lubrication oil is __________
Pressure Circulation Lubrication
The purpose of adding an inhibitor to lubricating oil is to __________ the engine.
Prevent Sludge and Varnish Formation on Parts of
Clean storage of lubricants and proper handling methods _________
Prevent injury and breakdown to machinery
Whena compressor is used for compression of natural gas, it is a fact that _________
Properly refined straight mineral oils are recommended
The purpose of the hand-operated choke in a gasoline is to _________
Provide an excess amount of air for easy starting
A safe recommendation for the bearing lubricant of a steam engine equipped with oil cups would be a(n) _________ oil.
Reasonably heavy
A thrust bearing is LEAST likely to be fond on a(n) __________
Reciprocating Pump
The slide valve gear is generally used to control the flow of steam in _________
Reciprocating engines
A thrust bearing is least likely to be found on a(n) __________
Reciprocating pump
Filters in the lubricating system of a vertical steam engine are generally used to _________
Remove solid particles from the oil
There are five belts in the drive of a certain fan unit. One of the belts is very loose. The PROPER action to take to correct this condition is to __________
Replace all belts with new belts
The primary advantage that a friction clutch has over a positive clutch is that the friction clutch __________
Requires less maintenance
The Stephenson double bar link motion is the USUAL type of machanism employed for ___________
Reversing reciprocating engines
In marine service, the bearings of auxiliary generators are usually oiled by means of the __________ method.
Ring or chain
The PRIMARY purpose of crossing a belt when connecting two pulleys is to _________
Rotate the shafts in opposite directions
The one of the following actions that MUST be taken during normal operation to clean a knife edge (cuneo) strainer is __________
Rotating the Cleaner Blades
When it becomes necessary to use "V" blocks to hold when drilling holes therein, it can usually be said that this stock is __________
Round
The proper gap on a spark plug can be MOST accurately set by use of a __________ gage.
Round wire feeler
In the simple grease cup the lubricant is forced into the parts to be lubricated by __________
Screwing dow the cap
The fraction 5/8, expressed as a decimal , is __________
0.625
A well-designed, properly operated, diesel engine should consume a gallon of lubricating oil for approximately EVERY __________ horsepower hours of operation.
1000
General experience indicates that the lubricating oil temperature for the bearings of steam turbines should NOT be permitted to go above __________ degrees F.
110 to 120
If a journal has a diameter of 7" and turns at rate of 600 RPM, the rubbing speed of bearing in feet per mion., is, most nearly ___________
1100
Cooling or circulating water temperature for diesel engine cylinders SHOULD BE, in degrees F, most nearly, __________
115
A grade of 1 in 20 approximately the same as a __________ rise in a ___________ run.
12 inch; 7 yard
It is GOOD practice in the installation of three new packing rings in a stuffing box to require that the joints of the packing be spaced __________ degrees apart.
120
When installing three new packing rings in a stuffing box, the joints of the packing should be placed __________
120°
If a man earns $187.00 a day, the number of months it will take him to earn, $55,000 is, most nearly, (assume 21 working days per month) ___________
14
The vacuum side of a compound gage reads 14 inches of vacuum. The barometer reading is 29.76 inches of mercury. The equivalent absolute pressure of the compund gage reading, in inches of mercury, is MOST likely __________
15.76
As an oiler, you work for a facility that has automobiles that use, on the average, 600 quarts of one grade of lubricating oil every month. The number of one-gallon cans of the above oil that SHOULD be ordered each month to meet this requirement is __________
150
If 300 feet of a certain size pope weighs 450 pounds, the number of pounds that 100 feet will weigh is _________
150
The APPROXIMATE ropm of a Sharpies oil purifier is __________
16,000
In order to have effective separation of purification in a Delaval Purifier, it is recommended that the oil to be cleaned be heated to an APPROXIAMTE temperature of __________
160 degrees F
The temperature of the oil leaving reciprocating engine and turbine bearings, USUALLY has a range of _________
180°F to 110°F
The sum of 7/8", 3/4", 1/2", and 3/8" is MOST NEARLY _________
2 1/2"
The power in kilowatts consumed by an electrical heater used to raise the temperature of 20 gallons of oil per hour 100 degrees F is, most nearly, (assume 0.0013 KWH will raise 1 gal. of oil 1 defree F, disregarding heat-transfer losses)______
2.6
Two gears are meshed together and have a gear ratio of 6 to 1. If the small gear rotates 120 revolutions per minute, the large gear rotates at __________ rpm.
20
The MAXIMUM bearing oil discharge temperature at which a turbine beating may satisfactorily operate is __________
200 degrees F
The minimum amount of oil required in a system which circulates 30 gallons of oil per minute, with sufficent oil to give a complete oil change each 8 minutes, is MOST NEARLY __________ gallons.
240
The sum of the fractions 3 1/4, 4 1/8, 6 3/8, and 125/8 is, most nearly, ___________
26 3/8
The number of ropes usually used on the movable block of a 4 part fall is MOST NEARLY ___________
3
The weight, per linear foot, of a steel bar which is 12'6" long and weghs 40lbs is most nearly, __________ lbs.
3.2
The inside dimensions of a rectangular oil gravity tank are: height 15", width 9", length 10". The amount of oil in the tank, in gallons, (231 cu. in. =1 gallon) when the oil level is 9" high is MOST NEARLY _________
3.5
A 24-strand wick will feed to a large bearing operating at high speed MOST NEARLY the following quantity of oil, in drops per minute:
30
The speed of a crane trolley motor is 1200 RPM. If the motor pinion has 24 teeth and the driven gear has 92 teeth, the speed of the shaft is MOST NEARLY __________
300
The operating oil pressure in a torque converter usually has a range of approximately ________ to _________ psi.
35; 40
If a bucket capable of carrying 5 3/4 cubic yards is loaded to 3/4 of its capacity, it will be carrying, in cubic yards , APPROXIMATELY ___________
4 1/4
The oil feed rate to a steam engine cylinder with a 10-inch diameter psiton APPROXIMATELY a pint each __________
5 hours
The oil at the bearing surface of a steam turbine is USUALLY hotter than the bearing oil discharge temperature by __________ degreees F.
50 to 80
It takes 8 men, working 6 hours a day, 5 days to complete a paticular repair job in the engine room. The number of days it will take 4 men, working 10 hours a day, to do the same job, assuming all work at the same rate of speed, is ___________
6
The minimum factor of safety of a wire rope that is used for grab buckets should be NOT less than __________
6
AGMA Grade 1 lubricant is MOST NEARLY equivalent to SAE number __________
75
In a gravity oiling system which circulates 150 gallons of oil per minute, with the cycle repeated at 5 min. intervals, the amount of oil required in the system should be, most nearly, _________ gallons.
750
A cylindrical oil cup has an inside diameter of 4 inches and a hegiht of 7 inches. Its contents in cubic inches is, most nearly _________
88
When installing four new packing rings in a stuffing box, the joints of the packing should be placed _________ apart.
90 degrees
Double-base safety clips having vorrugated jaws when used on wire rope in making up an eye develops approximately __________ of the strength of the rope.
95%
A rectangular gravity feed tank measures 27" high, 30" long, 28" wide. Its capacity, in gallons, when full, is, most nealry, (231 cubic inches per gallon) ___________
98.4
The one of the following faults that would MOST generally cause a sudden increase in oil pressure in a lubricating line to a bearing is __________
A Clogged Strainer
Lubrication for modern reciprocation air compressors is GENERALLY supplied by __________
A Mechanical Force-Feed Oiler
IF a sudden increase of pressure at the oil pump is noted in a lubricating system, it USUALLY indicates that_________
A clogging at some point in the system or at the strainer
Demulsibility of an oil used for forced-feed lubrication is __________
A measure of the ability of an oil to separate out from an emulsion
Interval or cylinder lubrication of vertical marine steam engines are commonly accomplished by means of __________
A mechanical force feed lubricator
To transmit power between two shafts that are in the same plane but 90° to each other, it is BEST to use ________ gears.
A month
When grooving bearings, the type of groove MOST PREFERABLE is __________
Shallow U
The type of know that can be used for shortening a rope which does not have free ends, without cutting rope, is called a ________
Sheepshank
An oil sight gauge is a device to __________
Show oil level in a bearing housing or crankcase
The FIRST step in determining the reason why the bearings of a ventilating fan are "running hot" is to __________
Shut down the unit
A gravity feed lube system is used for the crosshead and the amin bearing of a large horizontal ammonia refrigeration compressor. This gravity oil tank should be prvided with a valve in the feed line at its the base so that the oiler can ________
Shut off the flow of oil when making repairs
In a well-operated lubricating oil and grease storage facility, lubricating oil is NOT normally removed from large drums by __________
Siphoning out of the Top of the Drum
As an oiler, you notice a leak around the piston rod of a double acting water pump. In order to reduce this leak, you should FIRST tighten each hexagon nut on the packing gland one __________
Sixth of a turn
The MAXIMUM ampere rating of the fuse to be used in an existing curcuit depends upon the ___________
Size of wire in the circuit
An oiler who is ADEPT at his job is one who is __________
Skilled
The texture of calcium-base is USUALLY __________
Smooth
The BASIC ingredient in the manufacture of lubricating greases is __________
Soap
Of the following lubricating, the one that is generally known as a heat-resisting grease is __________ grease.
Soda (sodium) soap
Of the following, the substance that is NOT commonly used in fire fighting equipment is ___________
Sodium chloride
Lignum vitae is USUALLY found in the _________
Stern tubes
A guy line is generally used with a ___________
Stiff leg derrick
A pipe fitting having a male thread at one end, a female thread at the other end, and shaped to a ninety-degree bend is called a(n) __________
Street Elbow
The texture of an aluminum-soap lubricating grease is _________
Stringy
When oiling an air compressor cylinder, it is BEST to use only __________
Sufficent oil to keep the walls covered with a thin oil film
The proper method an oiler should use to lubricate a duplex direct-acting steam pump feeding water to a boiler is to ___________
Swab the rods and check hydrostatic lubricator
An oiler has been ordered to lubricate a duplex direct-acting steam pump feeding to a boiler. To do the job effectively, he must do the following:
Swab the rods and check the hydrostatic lubricator
T/F A "D" type slide valve USUALLY controls the admission and exhaust of steam in a duplex pump.
T
T/F A flyball govenor is USUALLY used on an engine to maintain constant engine speed.
T
T/F A force-feed lubricator is fully automatic and delivers positive oil pressure to the main turbine bearings.
T
T/F A gate valve is properly used in a pipe line only of it is fully opened or fully closed.
T
T/F A high-viscosity lubricant is one that has high internal fluid friction.
T
T/F A low viscosity oil should be used to lubricate the spindle of the throttle valve and connecting levers of the governing mechanism of a steam turbine.
T
T/F A power pump is one in which the piston or plunger is operated by a unit other than the pump itself.
T
T/F A pressure-gage thermometer is a device that measures temperature from a remote point.
T
T/F A temperature of 100°C is equivalent to a temperature of 212°F.
T
T/F Absolute pressure is the sum of the gage pressure and atmospheric pressure.
T
T/F Automotive chassis grease or pressure-gun grease USUALLY consists of lime-aluminum or lime-soda grease.
T
T/F Bearings that operate at high shaft speeds and low pressure normally require a lubricant that has a fairly low viscosity.
T
T/F Belt dressings are USUALLY made of mixtures of osolid fats, waxes, or tallow mixed with castor or fatty oils.
T
T/F Compression grease cups are especially suitable for the bearings of machinery that are subjected to dust, dirt, and fine abrasive materials.
T
T/F Detergents are sometimes added to lubricate to prevent formation of sludge in gearboxes.
T
T/F Diesel-engine oils are highly filtered, straight mineral oils, USUALLY having a viscosity of SAE 10 to 40.
T
T/F Drip-feed, wick feed, and wiper-type lubricating systems USUALLY feed lubricants by means of gravity instead of pressure.
T
T/F Electric motors that do not have a pressure relief lubricating system or some means of adding a lubricant must periodically be disassembled, and the bearings repacked.
T
T/F Excessive lubrication of air compressor valves may cause spontaneous ignition.
T
T/F Globe and angle valves are generally installed where operation is frequent and valve closure must be tight.
T
T/F Grease is USUALLY recommended as a lubricant where leakage is too high to retain liquid lubricants.
T
T/F Grease is a solid lubricant for use where a fluid lubricant is NOT practical or economical.
T
T/F Grooved shafts and packing failures are USUALLY caused by NOT loosening packing gland nuts after an overnight shut down.
T
T/F Ice-machine oils are USUALLY high-quality, light to medium-bodied, pure mineral oils.
T
T/F If an 8" diameter pulley is driven by a 12" diameter pulley which rotates at 100 rpm, the driven pulley will rotate at 150 rpm.
T
T/F If an oiler receives a salary of a $450 a month and saves 12% of this every month, in one year his total savings will amount to $648.
T
T/F If it is said that an oil drum is 5/8 empty, it is the same as saying that this drum is 3/8 full.
T
T/F If the packing is properly installed and the gland correctly adjusted on a reciprocating pump, the shaft can USUALLY be turned freely by hand.
T
T/F Journal bearings are USUALLY cylindrical in shape, and support a rotating shaft.
T
T/F Labyrinth packing is very often used in steam-turbine practice.
T
T/F Lubricant impregnated into most asbestos packings by manufacturers is USUALLY all that is needed for steam jobs.
T
T/F Oil manifolds, cups and pipes should be cleaned occasionally with a steam hose or with boiling hot soda water.
T
T/F Packing glands are USUALLY tightened when machinery is shut down overnight to prevent leakage.
T
T/F Severe operating conditions will USUALLY change the color of lubricating oil.
T
T/F Steam-cylinder oils are generally residual, heavy bodied oils containing 5 to 15% compounds of acidless tallow lard.
T
T/F The first two shaft packing rings nearest the gland of a centrifugal or reciprocating pump USUALLY show the most wear.
T
T/F The indirect or atomization method has been generally accepted for introducing oil into the cylinders of steam engines.
T
T/F The operating oil pressure of a lubrication oil cooler is USUALLY higher than the operating water pressure of the cooler.
T
T/F The primary purpose of a lubricant is to prevent two rubbing surfaces from coming into direct contact with each other.
T
T/F The reservoir of a mechanical forced-feed kubricator is usally refilled by hand.
T
T/F The temperature of automotive-type bearings is usually held within safe limits by using a pressure-feed oil system.
T
T/F The texture of a grease refers to its structure such as smooth, fibrous, spongy or rubbery.
T
T/F The vacuum reading on a compound pressure gage is USUALLY measured in inches of mercury.
T
T/F The viscosity of oil generally decreases with increase of temperature.
T
T/F Three pieces pf pipe each 2'8" long can be cut from a length of pipe 8' 1 3/8" long if there is a waste of 1/8" per cut.
T
T/F Thrust bearings are generally used to prevent lengthwise motion of a rotating shaft.
T
T/F Turbine oils are highly refined, filtered oils with high demulsibility.
T
T/F Under certain conditions water can be used as a lubricant.
T
A pyrometer on a diesel engine is used for measuring __________
Temperature
In trouble shooting in a dual fuel engine, it should be remembered that high oil _________
Temperature may result from sludge in the crankcase
An oiler has put an excess amount of lube oil into the crankcase of an air conditioning refrigeration compressor. The MOST likely effect will be ________
That the oil carried over will be removed by an oil separator
In comparing a four-cycle diesel to a single acting two-cycle diesel, of the same capacity, it may be said that __________
The two-cycle engine usus more lubricating oil
The water cylinder of a duplex direct-acting steam-driven feed-water pump is lubricated by _________
The water being pumped
Assume that a horizontal roller chain drive us used to transmit power to the jack shaft of a crane. For proper tension the roller chain, ___________
There should be a small amount of sag in the chain
Gravity system of lubrication is sometimes preferred to the direct pressure system because _________
There will still be a few minutes supply of oil in tank in case of pump failure
If wicks are not removed from their oil tubes when the machinery is secured, __________
They will continue to deliver oil to the bearings for some time
The steam cylinder of a double-acting steam uniflow engine is USUALLY lubricated by means of an oil line located at the _________
Throttle valve
Packing glands of reciprocating pumps or compressores should generally be _________
Tightened when machine is shut down over night
The bearing materials usually called "white metals" or Babbit metal consist MAINLY of __________
Tin and Copper
A lubricant that possesses high adhesion is LESS likely _________
To run out of a bearing
The purpose of a fuse in an electric circuit operating at a set voltage is to protect against __________
Too much current
The point shaft on a boom is usually located near the _________
Top of the boom
The dirty oil to be purified in an operating DeLaval Purifier enters the purifier bowl from the __________
Top of the machine
In the fuel system for a 4-stroke cycle full diesel engine, the oil travels in sequence from the fuel tank to the ___________
Transfer pump, filters, injection pump, injection valve, and pre-combustion chamber
On a truck mounted portable air compressor, the differential assembly is located in the ___________
Truck rear housing
The ring in ring-oiled bearings has a diameter that is USUALLY __________ the journal the diameter.
Twice
The oil used in a ring-oiled bearing ___________
Usually runs at a somewhat higher temperature than if used in force feed lubrication
The resistance to flow of aliquid is measured by a(n) __________
Viscosimeter
The MOST important single property of a lubricating oil is its __________
Viscosity
The S.A.E. numbers, as used in a classification of lubricants, generally indicate the ___________
Viscosity
The characteristic of a lubricating oil that varies with changes in operating temperatures is COMMONLY called its ___________
Viscosity
The common terms "heavy" and "light", applied to an oil, refer ONLY to the oil's __________
Viscosity
The rate of change in viscosity of a petroleum oil with its temperature is indicated by its __________
Viscosity Index
For succesful operation of a machine equipped with a torque converter, the operator should ________
Watch the load or bucket
The sealing fluid in lubricating oil centrifuges is __________
Water
A boiler feedwater regulator automatically controls the __________ the boiler.
Water Supply to
Generally, at which point should a turbine-driven generator, with an integral lubricating oil system, put the lube oil cooler in operation?
When the temperature of the hottest bearing reaches 100 degrees F
Trapped air pockets in an engine cooling water circulating system __________
Will feel hotter than the surrounding suspected parts
Strainers set in a lubricating oil system __________
Will remove only solid particles
The wick used in a gravity oil-feed system is USUALLY made of __________
Wool
The wick used in a gravity oil feed system is USUALLY made of _________
Worsted yarn
Of the following metals, the one that is USUALLY used for socketing wire ropes is __________
Zinc
If 30 gallons of oil cost $9.60, 45 gallons of oil at the same rate will cost _________
$14.40
If the cost of lubricating oil increases 15%, then a gallon of oil which used to cost $2.00 will now cost MOST NEARLY __________
$2.30
If an oiler earns $1800 in the first six months of a year and recieves a 10% raise in salary for the next six months of the same year, his total earnings for the year will be __________
$3780
If a large machine is noted to have both a hand oiler and a mechanical feed lubricator, one may reasonably assume that the hand oiler _________
Is for starting
Lubricating grease __________
Is made up of 1/2% to 20% of soap in mineral oil
Direct pressure system of lubrication is sometimes preferred to gravity system because __________
It is cheaper to install since less equipment is required
If an electric motor is regularly overlubricated, __________
It may result in oil-soaked insulation
The mechanism that is used to rotate the crankshaft of a marine engine a fraction of a revolution when making repairs to the engine, is called a __________
Jacking engine
The one of the following pumps that does NOT have moving parts to be lubricated is a __________ pump.
Jet
Detergents are used in lubricating oils to __________
Keep Insoluble Matter in Suspension
The spring -loaded compression grease cup __________
Keeps a continuous pressure on the grease
In a wick lubricator, the wick should be removed from the tube from time to time and rinsed in __________
Kerosene
The ons of the following fluids that should be used when cleaning filter bags pressure-type lube oil filters is __________
Kerosene
A compounded lubricating oil is USUALLY a mineral oil to which a quantity of __________ has been added.
Lard oil
Splash lubrication is caused by _________
The action of the crank in the crankcase oil
Where the bearings are ring-oiled, as in the case of certain types of auxiliarities, it may be said that __________
The bearing temperature may run higher than with force feed lubrication
In a 2 stroke cycle diesel engine, the cylinder is scavenged by __________
The combustion air
A gear type flexible coupling is used in a gas turbine application. In this instance, ________
The coupling develops heat if misalignment occurs
Strainers installed in an oil service system should be of the duplex design so that __________
The flow of oil will not be interrupted when it becomes necessary to clean either of the strainers
In regard to self-oiling bearings, __________
The level of lubricant in its well should be checked periodically
After installing a tapered roller bearing, __________
The level of oil in the bearing housing should just cover the lower rollers
When large gears are bath lubricated, the oil level should be maintained so that ________
The lowest gear teeth dip into the oil
In a mechanical force feed lubricator, __________
The oil feed can be regulated to the required drops per minute
In the operation of heavy duty gears, "thick film" lubrication means that __________
The oil supports the load by hydraulic action
In a centrifugal refrigeration compressor,
The only parts requiring lubrication are the bearings of the rotor and the thrust bearing
In the splash system of lubrication, __________
The quantity of oil splashed against the cylinder wall cannot be regulated
When operating a freon refrigeration compressor, it is found that _________
The refrigerant is miscible with the lubricating oil
The clutch torque delivered by a fluid coupling is APPROXIMATELY _________ the engine torque.
The same as
