By weight oxygen is what’s percent of air?

A. 17%

B. 20%

C. 23%

D. 25%

C. 23%

Boiler is the condition which existing?

It is a closed vessel in which water under pressure transfer into steam by the applicant of heat. Strongly constructed of steel or iron.

Human comfort requires a relative humidity of about?

A. 20%

B. 35%

C. 50%

D. 65%

B. 35%

 In a steam absorption air condition system, the refrigerant is?

A. Water

B. Lithium Bromide

C. Steam

D. Bromide Vapor

A. Water

A foot candle is a measure of?

A. Intensity of illumination on a surface

B. Candle power of a light source

C. Power emitted by a source of light

D. Heat energy received from standard candle

E. Light from a candle one foot long

A. Intensity of illumination on a surface

White ceiling and walls aid in illumination of a room because reflection?

A. Refraction

B. Absorption

C. Dispersion

D. Polarization

E. Diffused reflection

E. Diffused reflection

Steam on the outlet of a pressure reading valves is?

A. Superheat

B. Steam Trap

C. Flow Balance

D. High Temperature

A. Superheat

Heat energy is defined as?

Kinetic energy caused by molecules motion within a substance.

The upper safe running temperature of the oil turbine bearing is?

A.120

B.150

C.180

D.220

C. 180

A high oil level in a ring oiled bearing housing could cause?

A. More heat remove

B. No effect

C. Over heat oil

D. Oil starved bearing

D. Oil starved bearing

The thermostat expansion bulb should mounted

A. On the top

B. On the bottom

C. On the side

D. No difference

A. On the top

The time rate of doing work is call?

A. Electrical energy

B. Power

C. In rush period

D. Power factor

B. Power

The electrical unit energy is?

A. Ohm

B. Watt

C. Volt

D. Amp

C. Watt

Electrical energy is sold to consumers in unit?

A. Volts

B. Amperes

C. Kilowatt

D. Kilowatt hour

D. Kilowatt / hour

A 6-volt, 2 ampere bulb and a 2 volt, 6 ampere bulb have the same?

A. Resistance

B. Nichrome

C. Wattage

D. All of the above

C. Wattage

A voltmeter is used to measure what?

A. Watts

B. Amperes

C. Kilowatts

D. Difference potential

D. Difference potential

The unit of the electrical power is?

A. Volt

B. Ampere

C. Watt

D. Watt hour

C. Watt

Transformer is a device which can?

A. Step up or step down from A/C voltage

B. Step up or down

D. C voltage

C. Step up or down voltage

E. None

C. Step up or down voltage

What will be the final temperature of the motor core operating at full 40 degree.C.rise, if the ambient? Temperature is 70 degree F.?

A.174F

B.142F

C.72F

D.110F

A. 174F

Oil in a transformer is to?

A. Carry away heat

B. Cool primary

C. Provide ballast

D. Lubricate internal voltage switch

B. Cool primary

A rectifier is a device for charging?

Electrical device for converted AC to DC

Two push button, wired that either button may be use to ring the same electrical bell must be wire?

A. In series with each other

B. In parallels with each other

C. In series and parallel with each other

D. None of the above

B. In parallels with each other

A device that converts electrical energy into mechanical energy is call?

A. Motor

B. Synchronizer

C. Generator

D. Power reactor

A. Motor

Freon is dangerous refrigerant gas because?

It displaces oxygen in the human body; it decomposes into toxic products when exposed to a flame or hot surface of about 1000 F; and it can naturally decompose into products that are irritating and poisonous

What can be wrong the refrigerant unit runs all the time and the cooling coil is warm?

A. Lack of the refrigerant

B. Bad thermostat

C. Bad Connection

D. Too much refrigerant

A. Lack of the refrigerant

The basic principle of the draft gauge is?

To measure the difference in pressure between two points that causes to flow

The steam plant master control set point parameter is?

A. Megawatt load

B. Steam flow

C. System Demand

D. Steam header pressure

D. Steam header pressure

The type of control system usually used for a small apartment building is a?

A. Position control

B. On and off control

C. Metering control

D. Enter grate control

B. On and off control

The steam gauge is protected by a?

A. Siphon or loop

B. Steam trap

C. Column of mercury

D. Column of air

A. Siphon or loop

If the chemical control is use, bottom blown down shall be done?

A. Every shift

B. 8 Hours

C. 4 Hours

D. By Analysis

D. By analysis

A word describe a feed water heater is?

A. Superheat

B. Reheat Cycle

C. Condenser

D. Economizer

D. Economizer

Low water cutoff are designed to?

Safety device shutoff fuel going to the burners. if low water condition occured

For most boilers, maximum efficiency is obtained when the load is?

A.40%

B.60%

C.80%

D.100%

C. 80%

Fire tube boiler operating at 100 psig, saturate experiences a disastrous explosion about how much of The boiler water will be flash to steam?

A.5%

B.15%

C.25%

D.40%

B. 15%

Theoretical combustion may be called?

A. Incomplete

B. As Fired

C. Perfect

D. Complete

C. Perfect

Furnace pressure slightly below the atmosphere is referred to as?

A. Balance draft

B. Induce draft

C. Excess draft

D. Force draft

A. Balance draft

When firing oil and furnace is pulsating______will reduce the pulsating?

A. Increase Fuel

B. Increase Air

C. Increase oil temperature

D. Decrease the air

B. Increase Air

Overfeeding of the oil into an air compressor can result in?

A. Overheating

B. Over speeding

C. Explosion

D. All of the above

C. Explosion

The power plant has a total of 235 horsepower in electric motors, how many kilowatt hours does this? Amount to .if the motors run 10 hours per day? GIVEN 1 Horsepower = 746 watts

A. 175,310

B. 1,753,100

C. 1,753

D. None

C. 1,753

What safety rule must every engineer and maintenance man know before working on the machinery? A. Have a work order

B. Pull the switch

C. Lock the controls in off position with your own padlock

D. All of the above

E. None

C. Lock the controls in off position with your own padlock

A circuit that has more than one path for the current is called?

A. Parallel Circuit

B. Series Circuit

C. Compound Air D. Safety Circuit

A. Parallel Circuit

A motor winding life is cut in half for every ____ increase over the rate motor operating temperature is?

A. 5 Degree.C.

B. 7.5 Degree.C.

C. 10 Degree.C.

D. 12 Degree.C.

C. 10 degrees C

The uniformed boiler and pressure vessels laws society?

Recommends that the [ASME] boiler and pressure vessel code as the standard for construction; tries to secure uniform rules and regulations among states, cities and coutries; and, believes that all laws, rules and regulations should follow nationally accepted codes and standards.

In a liquid charge thermostatic expansion valve, fluid inside the sensing bulb is?

A. R-12

B. R-717

C. Same as the refrigerant in the system

D. Difference than the refrigerant in the system

C. Same as the refrigerant in the system

'

Solenoid valves may hum due to the?

A. Low Voltage

B. A Loose Connection

C. Sticking Plunger

D. All of the above

D. All of the above

What is the area piston of 7 inches in diameter?

A.70 Sq inch

B.38.5 Sq inch

C.32.2 Sq inch

D. None

B 38.5 sq in

The air collects in a refrigerant system is in the?

A. Cooling Coil

B. Compressor

C. Condenser

D. Liquid Receiver

C. Condenser

The EER (Energy Efficiency Rating) of an air conditioning measure?

A. Temp/Pressure

B. Btu/Watt

C. Btu/Hour/Watt

D. Btu * Watt

C. BTU/Hour/Watt

If in a alternating current circuit, the volt meter and ammeter read are 110 and 20, what is the Apparent power?

A. 2,200watts

B. 4,400watts

C. 440watts

D. None

A. 2,200 watts

50. Steam turbine turns at 3600 rpm and the diameter of its largest rotor is 12ft. find the linear velocity of a point on the tip of a rotor blade ? GIVEN Cosine 45 degree = 0.707

A.220 cubic feet

B.1000 cubic feet

C. 1,555.4 cubic feet

D. None

D. None

A boiler requires 30,000 pounds water per hour. What is the size of feed pipe necessary, if the rate is 360 feet per minute?

A.1 Inch

B.2 Inch

C.4 Inch D. None

B. 2 inches

The meter in an alternating current circuit read 110 volts and 20 amps. If the angle of log is 45 degree, What is the true power? GIVEN (Cosine 45 degree = 0.707)

A.220 watts

B.1000 watts

C. 1,555.4 watts

D. None

C. 1,555.4 watts

The cost of operating the air conditioning plant is $320 a day for 100 days and $435 a day for 265 days. What is the total annual cost operating the plant?

$147,275

Blow down safety valve at what pressure

Betweem 2 - 8 PSI

A draft gauge is?

A difference in pressure between two points that causes air or gases to flow

What causes internal corrosion or pitting in a boiler?

Oxygen and carbon dioxide

The Hays pointer gauge is?

A. Dry type

B. Diagram

C. A None Liquid draft gauge

D. All of the above

E. None of the above

D. All of the above

Furnace panting or pulsating is?

A. Raise air supply

B. Raise fuel supply

C. Raise oil supply

D. Decreasing air supply

A. Raise air supply

What is a Prony brake?

A device for measuring power

Air condition coil is actually?

Coils cooled by a fluid that does not evaporate (such as brine). The evaporator is a cooling coil.

Boiling is the condition which exist when?

Water increase with increase in pressure until the critical pressure temperature point is reach.

Direct current will not operate?

A. Electrical Fan

B. Electromagnetic

C. Transformer

D. Toaster

E. Battery Charger

C. Transformer

Tensile strength is?

Result of force applied to an object that stretches object

Direct current is?

Electron flow in one direction only in a circuit

If a boiler system run on gas and burning constantly when temperature increase is what happen?

If the water temperature in the system increases, then the water will expand into expansion drum compression the gas and increasing the pressure

Took over shift logs, what are the things you should check?

A. report early enough to check the operating equipment

B. check the water level on all boilers online by blowing down the gauge glass and the water column

C. check steam pressure gauge for proper operating pressure.

D. Check conditions of fires.

E. Check all running auxiliaries for proper temperature, pressure and lubrication

F. check feed water heater for proper level, temperature and pressure.

G. Check log for any instruction from the chief engineer, check with the stationary engineer being relieved to identify any unusual events that happened on the previous shift.

Define mechanical horsepower

Unit of measure equal to 33,000 ft-lb of work/minute.

Define factor evaporation

Correction factor used to compensate for the boilers not operating with a steam-water temperature of 212 degrees.

Define a Bourdon tube

Part of a pressure gauge that expands and contracts to indicate pressure. Connected by linkage to a pointer inside a pressure gauge.

What kind of tool to test the light bulb?

Use a multi-tester [multimeter]

Define ammeter

Meter used to measure current in any part of a circuit

A vibration steam line attached to a boler can cause?

Fatigue which might cause fracture of failure of the valve or connection to which the steam line is attached.

Define current measured

With an ammeter in amps

A lower water temperature enter to the boiler is?

A. 70

B. 90

C. 120

D. 140

C. 120

Reaction steam turbine is what?

The reaction steam turbine is larger. The reaction steam turbine is a low pressure steam turbine that is inefficient when used high steam pressure because of steam losses around the blades. Steam pressure drops per element must be small. Therefore, the steam turbine is relatively large.

Define overspeed trip

Tripping device designed to trip main steam stop to steam turbine when the steam turbine goes 10% over is rated RPM. Prevents the steam turbine from destroying itself.

Define governor

Automatic mechanical or hydrolic device that controls the speed of steam turbine or engine.

What kind of pumps do turbines use?

A condensate and circulate pump

Why do most commercial buildings use generators?

To prevent power loss and provides backup for the building

A single piping system is?

A system where the condensed water returns through the same pipe in which the steam rise.

Define Ohm's Law

A law stating that current in a circuit is proportional to the voltage and inversely proportional to the resistance

How do you bring up boiler pressure?

Slowly reach to 75% and open main steam valve slowly

Bottom blow down of heat exchanger constantly water coming out; What's the cause?

Heat exchanger is leaking or system is not normal

Define flywheel

Keyed to the crankshaft and stores kinetic energy of rotation and causes the piston

A 60" diameter boiler drum has a tensile strength of 50,000 psi, boiler seam efficiency of 90%, factor Of safety of 5, and an MWAP of 200 psi. Find the thickness of the plate require?

MAWP= STE / FR

T = MAWP * FR / SE

MAWP= maximum allowable working pressure

S= tensile stength of material (in psi)

T= thickness of metal (in inches)

E= efficiency of joint

F= factor of safety

R= radius of the boiler drum (in inches)

T= 200 * 5 * 30 / 50.000 * .90

T= .67"

On a boiler equipped with a superheater, which safety valve should lift first?, and why?

The superheater safety valves should lift before any of the drum safety valves. Superheater depend on steam flowing through them to avoid overheating. Steam is diverted from the superheater when a drum safety opens

There are two ways a boiler can explode. Name them, and explain how they happen and are prevented

A furnace explosion occurs when raw few in boiler suddenly ignites. The result can be anything from singed eyebrows to the boiler setting being blown apart. The main cause is lighting the pilot flame when raw fuel is in the furnace. This is prevented by purging the boiler first, that is, by forcing four air changes through the boiler before igniting the pilot flame. Another cause of a furnace explosion is accumilated soot igniting during soot blowing

More than one safety valve is required on the boilers that have over..?

500 ft sq of heating surface

Explain what actions you would take if the water in the gauge glass suddenly disappears

If the water in the gauge glass suddenly disappears, first use the try cocks to check the water level in the water column, then blow down the glass and column. If there is no indication of water in the gauge / glass or bottom try cock, close the fuel supply valve. Do not  add water to the boiler for fear of the water flashing into steam and causing an explosion

A fan place in the breaching between the boiler and the chimney is?

A. Natural draft

B. Force draft

C. Induce draft

D. Balance draft

C. Induce draft

The presense of CO in the flue gases usually indicate is that there is insufficient air to burn the carbon to?

A. Fixed carbon

B. Ash

C. CO2

D. None of the above

C. CO2

An analysis showing the percentage of moisture ash, volatile matter and the fixed carbon is called?

A. Proximate analysis

B. Fusion analysis

C. Ultimate analysis

D. Bomb calorimeter

A. Proximate analysis

If the diesel engine is running away and you could not stop it in the usual way; what do you do?

A. Cut off the air and fuel supply

B. Checked the governor control mechanism

C. Don't worry about it, the over speed trip will take over

D. All of the above

A. Cut off the air and fuel supply

The amounted of steam use by a steam turbine, in pounds per horsepower hour is called?

D. Enthalpy factor

When hand cleaning the sump of a large turbine, you should not use

A. A squeegee

B. Lint free rags

C. Waste fabric materials

D. Absorbent material

C Waste fabric material

Turbine shaft axial position is maintained by?

A. Main bearing

B. Needle bearing

C. Thrust bearing

D. High pressure bearing

A. Main bearing

A steam turbine operating at 3600 rpm would generally have its over speed trip set at?

A. 3660 rpm

B. 3760 rpm

C. 3860 rpm

D. 3960 rpm

D. 3960 rpm

A steam turbine running at critical speed for any length of time will?

A. Shut itself down

B. Shake itself to pieces due to vibration

C. Speed up

D. Nothing will happen

B. Shake itself to pieces due to vibration

When opening the main steam valve to start a small auxiliary, you should?

A. Open the throttle fast

B. Open the throttle slow

C. Put the governor immediately

D. Set the servo to hand

A. Open the throttle fast

Steam turbine that exhaust at a pressure atmosphere is called a/an?

A. Extraction turbine

B. Back pressure turbine

C. Condensing turbine

D. Impulse / reaction turbine

C. Condensing turbine

If a turbine bearing is found to be overheating, the operator should?

A. Slow the unit and flood the bearing with oil

B. Pour water on the bearing

C. Pack the bearing in ice

D. Shut down the unit immediately

A. Slow the unit and flood the bearing with oil

The energy needed to fill a pump on its suction side and overcome friction and flow losses from the suction connection is referred to as?

A. BHP

B. NPSH

C. FLA

D. PUSH

B. NPSH

Where are the most important caution areas around ejector engine?

A. Inlet and outlet ducting /cowling

B. Shaft coupling and fuel nozzle

C. Compressor and turbine

D. None of the above

A. Inlet and outlet ducting / cowling

The difference between the actual and theoretical displacement pump is called?

A. Cavitations index

B. Start up loss

C. Pump efficiency

D. Slip

D. Slip

The device that should be used on a pump suction line that delivers fluid under lift is a/an?

A. Gate valve

B. Flood valve

C. Foot valve

D. Ejector valve

C. Foot valve

The feed water pump discharge line should have immediately after the feed water pump?

A. A check valve and a bypass

B. Globe valve and a bypass

C. Check valve and gate valve

D. Globe valve and check valve

C. Check valve and gate valve

A single element feed water control is use to control?

A. Feed water pump pressure

B. Steam flow

C. Feed water flow

D. Water level

D. Water level

The volume of a given quantity of gas will increase most if?

A. it’s temperature increase

B. It's pressure decrease

C. It's temperature is increase and pressure is increase

D. It's temperature constant and it's pressure increase

E. It's temperature is increase and it's pressure decreased

C. Its temperature is increased and pressure is increased

The difference in the coefficients of thermal expansion at difference metals explains the principle being the?

A. Low of two difference gases

B. Bimetallic thermometer

C. Spring load bourdon tube

D. Warp strip thermometer

B. Bimetallic thermometer

Assume that a person is in contact with an electrically charged wire, which of the following best explains the reason for not grasping the victim's clothing with your bare hands in order to pull him off the wire?

A. His clothing may be damp with perspiration

B. His clothes maybe 100% wool

C. You may be standing on a dry surface

D. You may be wearing rubber soled shoes.

A. His clothing may be damp with perspiration

Air contain 23 parts of oxygen and 77 parts of nitrogen, approximately what is the weight of the Oxygen in 12 pounds of air ?

A. 12lb

B. 2.76lb

C. 9.24 lb

D. None of the above

.23 x 12 = 2.76

B. 2.76 lb

 A steam turbine turns at 3600 rpm and the diameter of its largest rotor is 12 ft. find the linear velocity of a point on the tip of a rotor blade ?

A. 3600 ft/sec

B. 4200 ft/sec

C. 2260 ft/sec

D. 1200 ft/sec

P = II x D = 3.14 x 12 | 4 x 3600 =

C. 2260 ft/sec

A 200 horsepower package boiler operate on No.# 5 oil uses 0.280 gallons per horsepower per hour. If this boiler operates continuously at full capacity and 80% efficiency. How much fuel wills this Boiler use per a 24 hours day?

A. 2,058 gal

B. 1,562 gal

C. 1,344 gal

D. None of the above

D. None of the above

An engine has an indicated horsepower of 31 and a brake horsepower of 27.466. What is its mechanical efficiency? Formula ME = Hb / Hi

A. 60%

B. 75.5%

C. 88.6%

D. None of the above

27.466 / 31 = 88.6%

C. 88.6%

How do you identify hot water circulate pump as you enter to the boiler room you see three big pumps

The small pump is the hot water circulate pump or identify the loop hot water lines return and supply and trade the pipe's line to locate the exact hot water pump

Boiler is circulate by the pump and what is another way to feed water to the boiler?

Another way is the automatic make up water device

Name three types of centrifugal pumps

Radial flow

Mixed flow

Axial flow

What kind of oil seal is used on the shaft of an open drive centrifugal compressor?

York makes this type of unit. "The stationary portion is spring loaded carbon, the rotating collar is iron. An oil film is necessary for the seal to work"

Name 3 reciprocating pumps

Piston plunger diaphragm

Define ohms?

Unit of resistance

R = V/A

Define watts

Unit of power (Electrical, mechanical and thermal)

Define amperage

Unit of electrical current; equivalent to the flow of the coulomb per second

A = V/R

What is power?

The rate of which working is done. Measured in foot pounds per unit of time or watts

Define viscosity?

Resistance of a liquid to flow

Upright bucket?

There is a bucket without a hole in it that lifts the discharge valve off its seat when the trap fills wth condesate

Invert bucket?

Inverted bucket with a small hole in it. The purpose of the hole is to allow non-condensable gases escape

Define series circuit

Circuit that has one path for current to flow through all devices in the circuit and that has electrical devices and/or controls in line with each other

Describe alternating current

Current flow in one direction along a conductor for a fixed period of timeand then reverses itself and flows in the opposite direction for the same period of time

What would cause breshes to arc on a DC generator?

A. Brushes not seated or worn

B. High MICA

C. Shifted neutral plane

D. Dirty commutator

D. Dirty commutator

If 60 100 watt bulbs burned for 10 hours at a cost of 5 cents per kW; What would be the cost?

.6 * 100 = 6000

6000 * 10 = 60,000 / 1,000 = 60 kw * .05 = $3.00

A pump located in the basement of a building shows a pressure of 100 psi. What would be the pressure at the tenth floor if it is 100 ft above the pump?

100 - (10 * 10 * 4.33) = 56.7

How much horsepower is required for a 78% efficient pump to deliver?

1000 GPH against a 120 ft head

HP = 1000 GPH * 120 ft/60 min/hr * 3960 * .78

HP = .65 HP

What is the revolution per minute of a 6 pole motor at 60hz?

RPM = 120 * hz / poles

= 120 *  60 hz / 6 poles

1,200 RPM

What purpose does packing serve in a pump?

Packing forms the seal between the stationary pump casing and the rotation shaft

W = A * V

Means volt times amp equals power in watts

What is a kingsbury bearing and where is it found?

A kingsbury bearing is a type of thrust bearing that can absorb large axial loads. It is found on pumps, turbines and ship propeller shafts

What is the voltage on a 3,600 kw dc generator that is producing 250 amps?

3,600 kw * 1,000 w/kw/250 amps = 14,400 volts

What is the basic principle of the draft gauge?

A. Venture tube

B. Bourdon gauge

C. The response of water in a u-tube to charge in draft pressure

D. All of the above

E. None of the above

C. The response of water in a u-tube to charge in draft pressure

The heat energy requires evaporating 34.5 pounds of water per hour from and at 212 degress F is?

A. Factor of evaporation

B. Mechanical horsepower

C. Boiler horsepower

D. All of the above

E. None of the above

C. Boiler horsepower

What causes internal corrosion or pitting in a boiler?

A. Acid water

B. Organic matter in the feed water

C. Corrosive scale

D. All of the above

E. None of the above

D. All of the above

A modification of the basic u-tube principle to permit easier reading of small changes in draft pressure is the?

A. Vacuum pump

B. Incline tube

C. Rectangular gauge

D. All of the above

E. None ofthe above

B. Incline tube

Turbine is commonly, yet erroneously classed as?

A. impulse and reaction

B. high pressure and low pressure

C. High speed and low speed

D. All of the above.

E. None of the above

A. Impulse and reaction

When the steam enters near the center of the center of the turbine and escapes toward the circumstance, the flow is classed as?

A. Parallel

B. Radial

C. Axial

D. All of the above

E. None of the above

B. Radial

Which of the following engine can be classified as heat engine?

A. Steam engine

B. Steam and gas turbine

C. Internal combustion engines

D. All of the above

E. None of the above

D. All of the above

When a reciprocating engine is in operation top dead center, TDC and bottom dead center are overcome with use of the?

A. Slide valve

B. Piston

C. Fly wheel

D. All of the above

E. None of the above

C. Fly wheel

In many mechanical application it is necessary to convert straight line or reciprocating motion to rotating circular motion. What is the most efficient machine devised to perform this conversion?

A. Piston

B. Slide valve

C. Connecting rod and crank

D. All

E. None

C. Connecting rod and crank

In gas firing when the speed of burning propagation exceeds that of the gas issuing from the port?

A. Flame larger and bright orange

B. Flame becomes pale blue

C. Flame back into the mixing tube

D. All

E. none

B. Flame becomes pale blue

An engine that the speed is kept constant by a governor mounted on the crank shaft and is usually placed in one of the band wheels is called?

A. Compound engine

B. Automatic engine

C. Corliss engie

D. All

E. None

B. Automatic engine

On a steam engine indicator card, the diagram length is 5.81 inches; the spring scale is 50 pounds per square inch. The average diagram height is .96 inches. What is the card effective pressure? (MEP)

A. 12.9 pounds per square inch

B. 2009 pounds per square inch

C. 48 pounds per square inch

D. All

E. None

C. 48 pounds per square inch

A Wheatstone bridge usually determines?

A. Charges

B. Potential difference

C. Resistance

D. Power

E. Current

C. Resistance

A direct current generator difference from an alternating current genterator is that it has?

A. Commutator

B. Slip rings

C. Brushes

D. An armature

E. Stator

A. Commutator

The impedance an AC circuit containing resistance only is found by?

A. Dividing amperes by volts

B. Volts by amperes

C. Coulomb by volts

D. Multiplying farads by amperes

A. Dividing amperes by volts

The chief function of an electric generator is a closed circuit is to?

A. Furnish electrons to the circuit

B. Protons to the circuit

C. Maintain a potential difference

D. Give the electrons their negative charges

E. Give the protons their positive charges

C. Maintain a potential difference

To measure the current being used by a light bulb, we can?

A. Water meter in series with it

B. A Wheatstone bridge

C. Voltmeter in parallel with it

D. Ammeter in series with it

E. Ammeter in parallel with it

D. Ammeter in series with it

House light is connecting in parallel instead of series because?

A. The voltage must be the same across each lamp

B. The resistance of each lamp is decreased

C. Fewer amperes of current will flow through each lamp

D. The current pass through on lamp will pass through each of the other lamp

A. The voltage must be the same across each lamp

A pump is said to have flooded suction when..

A. a pump is capable of lifting water

B. a partial vacuum is created in the pump and suction pipe

C. water flow into pump by gravity

D. all

E. none

C. water flow into pump by gravity

An injector will not start if the steam pressure is below?

A. 40 psi

B. 50 psi

C. 60 psi

D. 80 psi

E. 100 psi

A. 40 psi

Electric power produced is usually measured in?

A. KW/hr

B. Amp/sec

C. KVA

D. kW

C. KVA

The types of blading used in combustion turbine (gas turbines) are?

A. Symmetric

B. Non-symmetric

C. Expansion

D. All

E. None

D. All

High suction pressure and low head pressure indicate the compressor is deficient is?

A. Refrigerant gas

B. Pumping capacity

C. Oil charging

D. Seize

B. Pumping capacity

What is a approximate maximum temperature which water can be raised by suction?

A. 125 F

B. 150 F

C. 175 F

D. 200 F

D. 200 F

Carbon tetrachloride cannot be used as a cleaning solvent because?

A. It evaporates rapidly and has a very toxic vapor

B. The vapors rapidly overcome a worker

C. It can harm the skin and vital body organs

D. All

E. None

D. All

A turbine shaft axial position is maintained by?

A. Main bearing

B. Needle bearing

C. Thrust bearing

D. High pressure bearing

A. Main bearing

Superheat steam is use in larges turbines to?

A. Provide more heat energy

B. Transport steam further

C. Provide more condensable

D. Provide better heat transfer

D. Provide better heat transfer

Boiling is the condition which exists when?

A. A liquid attains a temperature of 212 degrees

B. The critical temperature of a liquid is reached

C. Surface tension of a liquid is reduced to zero

D. The vapor pressure of a liquid equals the atmosphere pressure above the liquid

B. The critical temperature of a liquid is reached

An ice plant freezes ice in 300bls, block room water on 70 degree each block is frozen in a

Galvanized steel, “can” (a specific heat of steel = 0.115) whose weight is 120 lbs. The ice is at 10 degree, when the process is complete. How many BTU's of cooling capacity are require to Produce each 300 lbs block of ice?

A. 580 btu

B. 5,873 btu

C. 58, 730 btu

D. None

C. 58,730 btu

A 200 horsepower package boiler operate on # 5 oil uses 0.280 gallons per boiler horsepower Per hour. If this boiler operates continuously at full capacity and 80% efficiency, how much fuel Will this boiler use per 24 hours.

A. 2,058 Gallons

B. 1,562 Gallons

C. 1,344 Gallons

D. None

D. None

High suction pressure and low head pressure indicate the compressor is define as?

A. Refrigerant gas

B. Pumping capacity

C. Oil charging

D. Seize

B. Pumping capacity

Non condensable in a refrigerant system will?

A. Increase water usage

B. Lower suction pressure

C. Increase current draw of compressor

D. All of the above

D. All of the above

A superheated safety valve will be set to open?

A. Only when the water carries over

B. After the drum safety

C. The same time as the drum safety

D. Before the drum safety

D. Before the drum safety

About 50% of all furnace explosions occurs the period of lighting up and may be caused by?

A. Insufficient purge of the furnace before starting

B. No pilot flame or inadequate flame

C. Too lengthy a period for ignition

D. All

A. Insufficient purge of the furnace before starting

A bucket type steam trap has ceased to operate. The cause[s] may be?

A. A hole in the bucket

B. An accumulation of mud, scale, etc

C. An accumulation of heavy oil

D. All

E. None

D. All

Heat energy is defined as?

A. Potential energy

B. Kinetic energy

C. Atomic energy

D. Mechanical energy

B. Kinetic energy

Increasing the pressure has what effect on the boiling point of water?

A. No change

B. Temperature will be lowered

C. Temperature will be raised

D. Temperature will increase 2F for every psu

C. Temperature will be raised

 National Board of Boiler and Pressure Vessel Inspectors is comprised of the Chief Inspectors or other Officials charged with the enforcement of boilers and pressure vessel laws of their jurisdiction.