Chemical Engineering MCQs

Page No. 768

In the acid Bessemer process, the hot metal should have the following composition ?


aS < 0.05% and P < 0.05%


bS < 0.05% and P < 1.5%


cS 1.5%


dS > 1.5% and P < 0.05%



A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________?


a√(Particle diameter)


bParticle diameter


c(Particle diameter)2


d(Particle diameter)3


View Answer Particle diameter

Work study deals with the _______________ study?


aTime


bMotion


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Gross national product (GNP) means the total value of _______________ in a country ?


aGoods produced


bGold reserve


cEarning of the citizens


dTaxes paid


View Answer Goods produced

Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in ______________ position ?


aHorizontal


bVertical


cInclined


dAny


View Answer Any

The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?


aT1/(T1-T2)


bT2/(T1-T2)


cT1/T2


dT2/T1


View Answer T2/(T1-T2)

Blow off cock is provided in steam boiler to ____________________?


aGuard the boiler in case of abnormal rise in steam pressure


bDrain out water and sludge during its repair


cRegulate the supply of water in boiler


dPut out the fire in the furnace when the water level in the boiler falls to unsafe limit



The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?


aWater alkalinity & leakage


bHydrazine addition during feed water treatment


cRelease of non-condensable gas from water in the boiler


dScale formation



______________ pipe is the most suitable for carrying sanitary drainage?


aStainless steel


bReinforced cement concrete


cCast iron


dAsbestos cement


View Answer Cast iron

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?


aOccurs higher in the electro-chemical series of metals


bIs exemplified by magnesium plate


cIs much cheaper than the cathodic base material to be guarded against corrosion


dAll A, B. & C.


View Answer All A, B. & C.

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