Comp 8 part 2
Engineering and Maintenance Quiz
Test your knowledge and enhance your skills with our comprehensive Engineering and Maintenance Quiz! This quiz contains 51 thoughtfully crafted questions covering various topics related to mechanical engineering, maintenance practices, and tool usage.
Key features of this quiz:
- Diverse questions that challenge your understanding.
- Ideal for students, professionals, and enthusiasts in engineering.
- Immediate feedback on your performance.
In measuring the clearances between the main engine bearings and the crankshaft, which of these materials is commonly applied?
Copper shims
Persian blue
Plasti-gauge
Wooden gaging pegs
What type of tooth set on a hacksaw blade where every third tooth remains straight, while the other two are alternately set?
Rake
Alternate
Double alternate
Wave
After removing an old set of rings, which of the following conditions is indicated if a bright spot is found on each of a broken piston ring?
Improper lubrication
Excessive diamtrical tension
Insufficient ring
Insufficient gap clearance
A micrometer screw has a pitch of ?
40 threads per inch
75 thread per inch
50 thread per inch
100 thread per inch
What do you call that instrument use to take misalignment of the crankshaft?
Feeler gauge
Lead wire method
Clock or dial gauge
Deflection gauge
In certain cases, a cylinder liner can be refinished rather than replace. When properly honed, the ___.
Liner surface should have a crosshatch pattern
Cylinder liner should have a glazed apperance
Counterbore is slick and smooth
Cylinder should be cleaned with kerosene
When the timing gear backlash for a roots-type blower has become is properly repaired by____.
Renewing the driven gear
Renewing the drive gear
Renewing both driving and driven gears as a set
Shimming and pinning the gears with proper backlash
Which of the fittings should be used for installation of piping to permit removal of the pump for servicing?
Quick disconnect
Union
Coupling
Nipple
Heat is defined as ?
Conserved energy in a system
Stored kenitic energy
Thermal energy in transition
Movement and relative velocity
Which of the files listed can be used for sharpening a tool?
A single cut file
Only a double bastard cut file
Any bastard cut file
A triple cut file
Monel metal is an alloy composed mainly of?
Tin and copper
Iron and copper
Zinc and copper
Nickel and copper
After using a pipe cutter to cut a piece of pipe, the inside edge of the pipe should be_____.
Threaded for a standard pipe fitting
Deburred with a pipe reamer
Made square with a taper tool
Cleaned with pipe cleaner
Which of the following problems is the main source of fuel pump and injection system malfunctions?
Coated fuel lines
Improper lubrication
Excessive vibration
Air in the fuel system
What is the fusion of two metals joined together to produce a strong bind as one metal?
Soldering
Galvanizing
Welding
None
When a lathe is used for thread cutting, which determines the number of threads per inch produced by the lathe speed?
Drive motor and spindle
Spindle and feed rod
Lead screw and feed rod
Lead screw and head stock spindle
Which of the listed types of gasket materials should be used on high pressure fuel oil lines in a diesel engine?
Neoprene
Sheet asbestos
Soft copper
Fiber glass
Gland sealing steam is used during steam turbine operation to prevent the loss of____.
Temperature
Air
Vacuum
Oil
Accidental ground in a shipboard electrical system must be repaired as soon as possible as they will.
Damage circuit breakers
Appears on the ground detection system
Result in immediate power outages
Damage insulation and may cause severe outages
Why should two pipe joints be properly align before being connected?
Misalignment permits excessive expansion
Condensate rapidly accumulates when figure are
Misalignment of the joints will result to excessive strain
The pipe will be completely blocked by even the slightest
To minimize corrosion fuel oil strainer disks spacers blades are made of ?
Monel metal or stainless steel
Brass
Galvanized iron
Mild steel
If you are cutting external threads by hand and you start the die at an angle, what will happen to the external threads?
It will be straighten out after the third revolution
It will be rough, weak and easily broken
It will be out of round on the work
It will be cut crooked on the work
Boyle`s law can best be defined as?
The temperature and volume of a gas are inversely proportional when pressure is constant
The volume of an enclosed gas varies inversely with the applied pressure provided the temperature remains constant
A body of rest that tends to remain at rest that tends to remain at rest
The relationship between heat pressured and volume of a gas
For greater accuracy some micrometers have a vernier scale making it possible to read in incriments of ?
Five thousands of an inch
One hundreds of an inch
One thousand of an inch
Ten thousands of an inch
Which is the best indicator that a bearing is being properly lubricated?
Oil pressure at the lube oil pump discharge
Checking babbit flakes on lube oil filter
Oil temperature indicated by the bearing thermometer
Checking the side surfaces bearings
When the object you are cutting using a hand hacksaw is about to separate, how should you handle the hand hacksaw?
Change to a finer cut blade
Stop applying the cutting fluid
Reduce cutting speed and pressure
Increase cutting speed and pressure
For safety of the piping systems, what characteristic of gasket is most advisable to use?
Can withstand fluid temperature and chemically stable with the fluid used
Hard and stable with the fluid used
Vulnerable in varying temperature and creates a chemical reaction with the fuild
Elastic and soft
The term refering to the number of teeth per inch on a hacksaw blade is known as the?
Raker
Pitch
Set
Tooth set
Which method is often used to detect external defects in welded metals?
Ultrasonics
Magnetic particle
Visible dye penetrant
Flourescent penetrant system
What tool has to be used for enlarging a hole after a drilling operation?
Reamer
Boring tool
Countersinking tool
Counter bore
Which of the following is the property of a material that enables it to resist strain when stress is applied?
Strength
Hardness
Elasticity
Brittleness
As per regulations permit to repairs the boiler safety valves while installed on a main propulsion boiler and may be made by ____.
Any competent person on the ship
An approved repair facility only
The chief engineer in an emergency
Only the safety valve manufacturer
What is the purpose of improving the characteristics of the metal, especially steel, by heating it to a high temperature, though below the melting point, then cooling it, usually in air?
Welding
Normalizing
Tempering
Fracturing
What metal is used as an alloying material in the manufacture of varius special steel?
Vanadium
Manganese
Aluminum
Titanium
To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out?
Operating the pump slowly and applying oil freely to the shaft until the packing is properly seated
Lubricate the packing with cylinder oil before installing new turns of packing
Tighten the packing in small increments while the pump is operating
When renewing sections of pipe in a hydraulic system, it should always indicate the nominal pipe size of the piping ?
Actual inside diameter
Wall thickness
Actual outside diameter
Size of threaded connections
To safely remove the piston rod packing from the steam end of a reciprocation pump, you should____.
Do nothing, as this type of pump utilize O-rings in line of packing
Use a packing hook
Open the steam chest and pry the packing loose with a scraper
Open the throttle valve and blow the old packing out
During cutting in milling when the chips begin to produce long and continuous, it is best that the feed is____.
Away from you to correct alingment
Closer to the head stock to reduce offset
Toward you to correct alingment
Away from the headstock to decrease alingment
In electric arc welding, what purpose does the electrode coating serve?
Controls the metallurgical properties
Tolerates poor welding
Reduces porosity
It provided a gas shield
Packing rings installed on auxiliary turbines are lubricated by___.
A salt water service line
Separate lube oil lines
A water leak off line
Moisture in the turbine steam
Rubber O-ring has an inside and outside diameter of 64mm and 74mm respectively, which of the following best describes the O-ring?
The O-ring will fit to 9mm wide x 10mm deep grove
The O-ring will fit to a 10mm wide X 9mm deep grove
The O-ring will fit to 4.5mm wide X 5mm deep grove
The O-ring will fit to a 5mm wide X 4.5mm deep grove
To prevent vibration damage to the fuel supply line of the diesel engine, you may use:
A short length of heavy duty clear plastic tubing
Aluminum piping with expansion loops
Welded flange connections for all joints
A length of approved flexible nonmetallic hose
What is the cause of a bluish smoke observed in the exhaust of an operating diesel engine?
Water leaking into a cylinder
Low combustion temperature
A scored cyliner liner
An overheated engine
If a centrifugal pumps delivers insufficient discharge pressure due to worn wear rings, what corrective action is called for?
Replace the shaft sleeve
Replace the pumps
Replace the rings
Replace ring and impeller
What is the purpose of annealing the steel?
To make it softer
To make it tougher
To make it maleable
To make it elastic
Kinetic energy is associated with?
Movement and relative velocity
Relative position in respect to datum reference level
Energy stored in an object due to its position in a force filed or in a system due to its configuration
Internal energy of a system that is responsible for the temperature of the system
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