Prime Movers

Question 1

In bearing boars, the measurements should be taken and recorded. In These Positions

Answer 1

Vertically and horizontally.

Question 2

You measure a bore in.____ positions determine if the main bearing Bores are Circular without taper and the correct size. The size ensures that the bearing has the correct crush.

Answer 2

3

Question 3

Some of the methods used to treat the inside of cylinder liners in order to reduce the rate of wear are

Answer 3

.Induction hardening
.Hard chrome
.Nitriding

Question 4

________ Are sleeves that fit inside the cylinder boar and do not contact the engine coolant.

Answer 4

Dry liners

Question 5

_____ Are in contact with the coolant and form part of the water jacket.

Answer 5

wet liners,

Question 6

_____ Have cooling fins that surround the Outer diameter of the cylinder.

Answer 6

Air cooled liners

Question 7

_____ Liners that feature porting on them near the middle of the cylinder are used on 2 stroke engines.

Answer 7

Porting

Question 8

It is normal for liners to have Ware concentrated in a Pacific area. The tendency is for the liner to wear in A.______

Answer 8

Tapered fashion

Question 9

Most of the wear on a liner occurs towards the

Answer 9

Top of the liner near the upper limit of the ring travel

Question 10

Most of the wear on the liner occurs on the

Answer 10

major thrust side when cylinder pressure and temperature are at maximum.

Question 11

______ converts the downward linear motion of the piston to usable rotary motion

Answer 11

Crankshaft

Question 12

_______ is used when a cylinder has a ridge above the ring travel

Answer 12

Ridge reamer

Question 13

Removing the ridge on a cylinder under _______ in diameter is accomplished with a hand operated ridge reamer

Answer 13

6in (150mm)

Question 14

A pattern 40* to 60* honed in a cylinder is called

Answer 14

Cross hatch pattern

Question 15

Cross hatch pattern is

Answer 15

40 to 60 degrees

Question 16

After honing or deglazing use a _______________ to clean the cylinder

Answer 16

Bristle brush and hot soapy water

Question 17

Do not use __________ to clean cylinders because it it do not thoroughly flush the material and abrasive from microscopic grooves

Answer 17

Solvents

Question 18

To check cleanliness of the bore ________

Answer 18

Wipe with a lightly oiled lint free white cloth

Question 19

The most important part of liner installation is that the liner bores should be _________ same as integral cylinder for maximum diameter, out of round and taper

Answer 19

Measured

Question 20

You should put a bead of high temperature______________under the top liner flange in order to ensure a leak proof seal

Answer 20

Room temperature vulcanizing (RTV) sealant

Question 21

Before cleaning a crankshaft______

Answer 21

Remove the oil gallery plugs and reinstall them upon completion

Question 22

Before storing the Crack apply a _________ and stand the crank on its end for larger and longer cranks store them_____________

Answer 22

Corrosion inhibitor or grease on the crank

Laying flat in a crate but supported by V blocks on the main bearings

Question 23

_______ are sometimes referred to as a balancers or harmonic balancers

Answer 23

Vibration dampeners

Question 24

Vibration dampeners are sometimes referred to as balancers or

Answer 24

Harmonic balancers

Question 25

The purpose of a vibration dampeners is to_____

Answer 25

Reduce crankshaft torsional vibration

Question 26

Most bearings have ______________ that is compatible with the shaft and the operating conditions of the engine

Answer 26

A steel backing with a layer or several layers of material

Question 27

Engine bearings are usually one of two types

Answer 27

Sleeve or shell

Question 28

_______ are one piece bearings that are often called bushings

Answer 28

Sleeve bearings

Question 29

_____ are two piece bearings which allows for easier removal and replacement

Answer 29

She'll type bearings

Question 30

____ is the most accurate method of checking the bearing clearance but also the most time consuming

Answer 30

Measurements

Question 31

______ measure the bearing clearance by using a dial indicator and hydraulic jack

Answer 31

Bearing lift check

Question 32

Bearing lift checks measure the bearing clearance by using

Answer 32

Dial indicator and a hydraulic jack

Question 33

The most common cause of bearing failure is ________

Answer 33

Lack of lubrication

Question 34

The second most common cause of bearing failure is

Answer 34

Lubricant contamination

Question 35

Lubricant contamination can be caused my

Answer 35

Dirt,water,antifreeze, fuel and acids formed from blowby or fuels

Question 36

In the_____ method, the bolt length is measured before tightening

Answer 36

Bolt stretch (elongation)

Question 37

Never use chrome faced rings in ______

Answer 37

Chrome plated liners

Question 38

Any dots or lettering on the ring should be facing ____

Answer 38

Facing up

Question 39

If the piston ring have a bevel inside it should face _____

Answer 39

Up

Question 40

Most of the turbines are covered with insulation. Called _____ In order to retain heat and protect personnel

Answer 40

Lagging

Question 41

Turbones are equipped with an emergency._____ to Shut off the steam in the event of_____

Answer 41

Trip mechanism Overspeed

Question 42

If a fluid either liquid or gas flowing through a tube Rachel's a constriction or narrowing of the tube. The velocity of fluid flowing through the constriction increases and pressure decreases. Also, when the fluid leaves the construction, the velocity decreases and the pressure increases. This is called ______

Answer 42

Bernoullis principle

Question 43

2 different turbone blades are.

Answer 43

reaction blades Impulse blades

Question 44

___ Blades are not symmetrical, and they look like an air foil.(wing)

Answer 44

Reaction blades

Question 45

When the steam is released against the turbine blades, the total energy available from the steam is due to it's heat, weight, pressure and velocity, this is called the.

Answer 45

Enthalpy of the steam

Question 46

_____ Are arranged to direct the expanding steam toward the blades at the best angle Is it possible to harness the steams energy

Answer 46

Nozzles

Question 47

______ Harness the steam's energy by changing its direction. they are symmetrical and parallel to the shaft's axis arranged around circumference of the wheel.

Answer 47

Impulse blades

Question 48

_________ Is the removal of steam From the Turbine through the casing at various points. Steam is extracted at 1 or more points depending on the pressure level required.

Answer 48

Extraction

Question 49

Condensing turbines exhaust steam to a _______

Answer 49

Condenser

Question 50

The _____ is a heat exchanger that turns the steam back into hot water

Answer 50

Condenser

Question 51

________ Steam turbines are more efficient than non condensing turbines due to less backpressure and recycled condensate

Answer 51

Condensing

Question 52

The _________ Is mounted to the top of the turbine casing expose to the internal steam pressure? It is a warning device which indicates if the turbine casing has excess pressure. This device is only found on small impulse turbines.

Answer 52

Sentinel valve

Question 53

_____ Consist of a set of knife edged fitting close to a journal like section of shaft.

Answer 53

Annulus seals

Question 54

During normal operation a Spring holds the tripping leaver in position when the turbine speed increases to the trip setting usually _____ of operating speed

Answer 54

110%-115%

Question 55

Small generators are_____ larger Generators are cooled with.

Answer 55

Air cooled Hydrogen

Question 56

The turbine can be shut down dismantled and the deposits Removed by manual buffering, scraping or blasting them with ____

Answer 56

Walnut shells or rice or high pressure dry ice

Question 57

The acceptable range for oil discocity entering the bearing occurs when the oil temperature is between_________ And exit the bearing at about _______

Answer 57

105F-140F 130F-160F

Question 58

The diaphrams are lowered into place and checked for their proper location of fit. They need to be secure in the housing and have the specified clearance. Above, Below and on each side of the road, if there is any rubbing on the rotor damage occurs immediately. A _____ can be used to determine clearance

Answer 58

Laser unit, piano wier,or dummy shaft

Question 59

When all internal parts of the turbine lower casing are installed at a line, the final seal clearance to rotor location can be checked one method for checking rotor. 2 labyrinth seal clearance is by._______ using

Answer 59

Lead wier

Question 60

The foundation of the turbine should be isolated from the other building floors, it should be at least.______

Answer 60

2.5 times the mass of All the turbone assembly so that it does not move and helps dampen vibrations from the machine.

Question 61

_________ is when some of the exhaust heat is used to heat the air of combustion

Answer 61

Regeneration

Question 62

________ is when exhaust heat is used to generate steam for power generation of other plant processes

Answer 62

Cogeneration

Question 63

_________ is to improve the thermal efficiency of the gas turbine by using the exhaust heat (wast) to assist in the heating and expansion of the gases before the turbine

Answer 63

Regeneration

Question 64

There is no reciprocation motion in the ___________

Answer 64

Gas turbine

Question 65

There is no reciprocating motion in the gas turbine this reduces_______

Answer 65

Wear and vibration

Question 66

Gas turbine can be started very _______ with no harmful effects to the engine and can be shut down in a reasonably short time

Answer 66

Quickly

Question 67

_________ is air that enters the combustion liner (flame tube) to be mixed with fuel and burnt

Answer 67

Primary air

Question 68

_______ is air that has no part in the combustion process

Answer 68

Secondary air

Question 69

_______ connects the combustion chamber to the turbine and is a duct or passage long enough to mack sure the hot air is thoroughly mixed so there are no remaining hot gas pockets

Answer 69

Transition piece

Question 70

The _____ type chamber is most often used on engines with centrifugal compressors

Answer 70

Can

Question 71

______ are used with axial flow compressors. They have one housing around the shaft and one undivided liner inside the housing

Answer 71

Annular type chambers

Question 72

The _________ chamber is a combination of both can and annular types. They are used with axial flow compressors

Answer 72

Can annular

Question 73

The gas turbine must be rotated to about __________ of its maximum speed before the fule is turned on

Answer 73

20% to 30%

Question 74

The __________ purpose is to control the turbines speed automatically under varying loads

Answer 74

Governor control

Question 75

The _______ provides automatic registration of fule and compressor vanes for both starting and normal operation of the gas turbine

Answer 75

Governor control

Question 76

The Highest temperature on the unit is found at the point where the heated air leaves the ______

Answer 76

combustion chamber

Question 77

Defective fuel control ignition is the usual reason for Failure to start. Most engines have ______ igniters for ignition even though there may be a greater number of combustion chamber

Answer 77

1 or 2

Question 78

The octane rating refers to the ability of the fuel to

Answer 78

Resist ignition due to compression

Question 79

The gasoline fuel system uses a liquid fuel that must be _____ with air before it enters the engine cylinders

Answer 79

Metered and atomized and mixed

Question 80

A major component in the system is the converter/regulator also called a

Answer 80

Vaporizer