ffc test

FAUJI FERTILIZER BIN QASIM LIMITED

TEST PAPER

NAME : _____________________________ Date : _______________________ P.No. :_____________________________ Marks :________________________

Designation :_____________________________ Invigilator Sign. :________________________ INSTRUCTIONS : 1) ATTEMPT ALL QUESTIONS.

2) EACH QUESTION CARRIES EQUAL MARKS

3) FOR EACH QUESTION TO ANSWER, CHOSE FROM DIFFERENT OPTIONS GIVEN. WRITE YOUR CHOICE OF ANSWER IN THE BLOCK AGAINST EACH QUESTION.

Q-1.___________ is the heaviest of ammonia, carbon dioxide and urea.

 Ammonia

 Carbon dioxide



Urea.

Q-2.Viscosity of oil increases with ___________ in temperature.

 Increase



Decrease

Q-3.Thrust bearing limits the amount of ______________



Radial movement

 Axial Movement

 Both A & B

 None of A & B

Q-4.Percentage of nitrogen in ammonia is _______________.

 88

 14

 72

Q-5.Atmospheric pressure at sea level is ___________ pressure at hill station.



Higher than

 Lower than

 Equal to

Q-6.Liquid level can be determined by measuring ______________ at the bottom of tank.



Pressure.

 Weight

 Density.

Q-7.The only best way to operate the furnace efficiently is to _____________.

 Analyse the flue gases.

 Check color of flame.

 Measure fuel pressure.

 All of above . A,B & C.

Q-8.Steam turbine should ______________ when the steam exhaust valve is closed.



Never be started

 Be started.

Q-9.Purpose of steam N.G. reforming reaction is to produce ______________________

 Oxygen



Hydrogen

 Carbon monoxide

 None of above.

Q-10.Reforming reaction is favoured by _______________.

 High temp.  High pressure  Low Temp.  Low Pressure.  Both A & B



Both A & D

Q-11.The percentage of pure liquid caustic is generally.

 50

 40

 100



70

Q-12.Oxygen in gas fired boiler exhaust is kept at ________________



2~3 %

 20%

 25%

 50%

Q-13.Hardness of ground water is ________________ river water.

 More Than

 Less Than

 Same as

 None of above

Q-14.Centrifugal pumps are designed for _________________



High flow requirement

 Low flow requirement

 High pressure requirement

 None of above.

Q-15.Natural gas is __________________

 Heaver than air.



Lighter than air

 Same in weight.

Q-16.Temperature of water in steam drum is ______________



Same as steam temp.

 Slightly higher than steam temp.

 Slightly lower than steam temp.

 None of above.

Q-17.Moisture from air can be removed by _______________

 Silica gel



Both A&B

 None of A&B

Q-18.CBD of cooling tower is done to __________________

 Maintain PH.

 Reduce temperature.

 None of above. Q-19.Complete the equation : 2NH3 + CO2



NH2 COO NH4

 NH2 CO NH2

 NH2 CO NH3

 None of above

Q-20.Ammonia synthesis reaction is ________________

 Endothermic



Exothermic

 Isothermal

 None of above.

Q-21.N2 and H2 are supplied for NH3 synthesis reaction at molar ratio of ______________________

 2 : 1



1 : 3

 3 : 1

 1 : 2

Q-22.Density of water is _______________ the lube oil



Greater Than

 Less Than

Q-23.There is greater percentage of power loss in the form of ΔP in case of

 Rota meter



Orifice Meter

 Venturimeter

 Pitot tube.

Q-24.When the velocity of liquid or gas increases, it’s pressure will

 Also increase



Decrease

 Remains Same

Q-25.Combustion is a chemical reaction in which fuel reacts with _______________ to release heat.

 Nitrogen

 Hydrogen



Oxygen

 None of above.

Q-26.Explosive range of hydrogen is

 4 ~ 40%



5 ~ 74%

 35 ~ 75%

 None of above.

Q-27.Repeated testing has shown that 14.7 psi of pressure supports a column if mercury _________________ inches.

 22.5

 27



30

 34.2

Q-28.In a

barometer

the height of mercury column indicates atmospheric pressure. Q-29.In a

thermometer

the height of a column of mercury indicates temperature.

Q-30.Fluid flows because of

pressure differential

as electricity flows because of

potential

difference

Q-31.For same velocity of different fluids of different densities, flowing, in different pipes, mass flow rate will be

different

Q-32.Which impeller is the best likely to become clogged

 Open

 Semi enclosed



Closed

Q-33.Two centrifugal compressors operating in parallel will give advantage of

 Increased discharge pressure.



Increased flow.

 Not increased flow & pressure.

Q-34.A small pipe offers more resistance them a larger pipe.



True

 False.

Q-35.When the gas is at the tips of the impeller blades, it is at maximum ______________.

 Pressure



Velocity

 Volume

 None of Above.

Q-36.Vapour pressure of water at 100o C is _______________

 13.6 Cm.Hg

 100 Cm.Hg



76 Cm.Hg

 100 N/Cm2

Q-37.Velocity meters are used primarily for measuring the flow rate

 Liquid

 Gases.

Q-38.Orifice meter and venturi meter measures.

 Point velocity



Avg. velocity

 Max. Velocity.

Q-39.SCF is the volume a gas would occupy if it were measured at a standard pressure of ________________ psia anr a standard temp. of ______________- oC



14.7



25

 0 , 0

Q-40.____________________ valve is used for controlling direction of flow.



Check valve

 Gate Valve

 Butter fly valve.

Q-41.The ΔP determines the ________________ of fluid flows.

 Pressure



Rate.

Q-42.Momentum is the tendency of an object to keep it once it is started.



Accelerating

 Moving

Q-43.The ________________ can change low voltage current to high voltage current.

 Generator



Transformer

 Turbine.

Q-44.Thermocouple measure temperature________________.

 Physically

 Chemical

 Pneumatically



Electrically.

Q-45.Which is not a parameter of fire triangle?



Continuous Combusting

 Fuel

Q-46.Ignition of fuel oil at its flash point would cause

 Continuous Combustion



Momentary flame

 No combustion.

Q-47.Ignition of fuel oil at its fire point would cause.



Continuous Combustion

 Momentary flame

 No combustion.

Q-48 A pyrometer is used to measure

 Pressure  Flow



Temperature

 All of Above. Q-49.Mercury is _________________ water.



Lighter than

 Heavier then

Q-50.Compressing a gas increase its pressure and decrease its ______________

 Temperature



volume

Q-51.Steam gives off more heat when it is

 Cooling



Condensing

.

Q-52.Which is the smallest unit of pressure.

 PSI

 In. HG



mm.Hg

Q-53.CO degree in Celsius scale area to ______________ degree on Kelvin

 18

 10

Q-54.Static pressure depend upon.

 Height of liquid

 Mass of liquid

 Weight of liquid



All of above.

Q-55.Which of the following effect the separation of petroleum product

 Temperature

 Pressure

 Feed rate

 All of the above

Q-56.When any liquid is allowed to evaporate, the temperature of the liquid will ________________.

 Increase



Decrease.

Q-57.To accomplish the most cooling in a cooling tower, a _______________ rate of evaporation is desire.



High

 Low

Q-58.A _______________ can measure average temperature over many location.

 Thermocouple

 Thermo pole

 Pyrometer.

Q-59.On the Fahrenheit scale, absolute zero, the ______________ possible temperature is _____________ oF.

 Lowest, -492



Lowest, -460

 Highest, -492

Q-60.The lowest possible temp. is the theoretical point called absolute zero where an object would contain _____________heat energy, and there would be no molecular motion.

 Very little.

 High.

Q-61.The heat transfer rate _________________ on the temperature difference.



Depend

 Don’t depend

Q-62.In parallel flow, when both fluids flow in the same direction, the not fluid _________________ be closed below the highest temp. of the cooler fluid.

 Can



Can’t

Q-63.Counter flow ______________ cooling a fluid to a temperature lower them the highest temp. of the cooling fluid.



Permits

 Prevent.

Q-64.At atmospheric condition ammonia is _________________



Gas

 Liquid

 Solid

Q-65.Methane is main component of ________________

 Natural gas

 CNG



Both

Q-66.Which of the following in not an explosive.



Calcium ammonia nitrate

 Nitro-glycerine

 Cellulose Nitrate.

Q-67.Which is heavier at atmospheric condition.



Air

 Carbon monoxide.

Q-68.Catalyst is used to ___________________ rate of reaction

 Increase



Decrease.



Alter

Q-69.1 MM is an abbreviation for one ________________

 Thousand



Million

 Billion Q-70.A foot valve is a



Back pressure valve

 A relief valve

 Direction control valve

 Pressure reducing valve.

Q-71.Charles low states that the volume of gas changes in direct proposition to changes in absolute ___________proportion.

 Pressure



Temperature.

Q-72.Oleum is represented is represented by formula.

 H2SO3  H2SO4  H2S2O6



H2S2O7

Q-73.One HP is equal to 746 ___________________.  K. Watt



Watt

 Joule

Q-74.Poison for platinum catalyst is _________________

 Sulphur



Arsenic

 Coke.

Q-75.The fluid that is flowing fastest is _____________ of the main stream



In the Center

 At the edge.

Q-76.A fluid can be excepted to absorb heat at a faster rate in ______________ flow.

 Laminar



Turbulent.

Q-77.The thicker the static film, the ________________ the heat transfer rate.

 Greater



Less.

Q-78.The value parentage of oxygen in the air is ___________%

 79



21

 19

 23

Q-79.Molecular weight of heavy water is _________________

 18

 19



20

 None of above

Q-80.Liquefying a petroleum gas is ___________ change

 Chemical

 Mechanical



Physical

Q-81.Valves are used to control ________________

 Level

 Pressure



All of above.

Q-82.Table salt solution in water has a pH _______________ 7



Equal to

 Above

 Below.

Q-83.Steam has good fire extinguishing property.

 Yes

 No

Q-84.___________________ is the formation & collapse of vapour bubble in the liquid.

 Hunting

 Surging



Cavitation

 Air Binding

Q-85._________________ convert the velocity of gas to increase the gas pressure.

 Impeller

 Casing



Diffuser

 Volute

Q-86.The purpose of an ejector is to remove _______________ from a vessel or line

 Gas

 Air



Both A & B

Q-87.Temperature indication on centrifugal scale and Fahrenheit scale is equal to ________________

 40

 -32

 32



-40

Q-88.________________ signal moves faster

 Pneumatic

 Hydraulic

Q-89.Heat transfer by conduction is described by _____________



Fourier’s Law

 Ficks Law

 Newton’s Law of cooling

 Stefon Boltzman Law

Q-90.Heating of a steam turbine is started ____________ start of lube oil circulation.

 Before

 After

 Both case A & B

Q-91.If pressure of saturated steam is let down (lowered). The resultant steam would be _____________.



Saturated steam

 Super heated Steam

 Super saturated steam

Q-92.Which type of pump is equipped with PSV at discharge ___________



Positive displacement

 Centrifugal

 Both

Q-93.The blow down line provided from the bottom of a steam drum is _______________ line

 Continuous blow down

 Intermittent blow Down



Can be used for both A & B

Q-94.Before handing over an exchanger on hydrogen gas service, for maintenance, it must be purged with _______________



Inert Gas

 Natural Gas

 Air

Q-95.Pressure gauge at outlet line of a catalyst bed reactor is showing more pressure than the gauge at inlet line of that reactor what does it indicate?

 High differential pressure

 Low differential pressure



Faulty gauge

Q-96.Which fluid is introduced first in heat exchanger

 Heating medium



Cooling medium.

Q-97.Is cooling tower heat exchanger ?



Yes

 No

Q-98.Rapid flow of gas back and forth in the centrifugal compressor is called ______________



Surging

 Chocking

 None of A & B

 Both A&B

Q-99.Sleeves bearing mounted at the end of the shaft prevent



Axial movement

 Radial movement

 None of the Above.

Q-100.A gas leaving a compressor contains added energy usually in the form of increased _________________



Pressure & Velocity

 Pressure & Temperature.

 Velocity & Temperature.

Q-101.Water with a pH value of 7.9 is _________________

 Acidic



Alkaline

 Neutral

Q-102.Pressure inside a furnace is ____________________ atmospheric in forced draft type of furnaces.

 Lower Than

 Equal to

Q-103.Heat is transferred from the heat source to the air by

 Conduction



Convection

Q-104.Cleaning, while the exchanger is operating is called _______________ maintenance Q-105.Rate of conduction varies with temp. difference



True

 False

Q-106.Coupling need no lubrication



Rigid

 Flexible

 Both A & B

Q-107.Labyrinth seal ____________ touches the shaft.

 Does



Does not.

Q-108.When oil is used as a fuel, it must be changes from a liquid to a

VAPORS

before being mixed with air.

Q-109.Flash backs at individual burners may be corrected by adjusting the ______________ air doors.

 Primary