Graphite is used in nuclear reactors
A.as a lubricant
B.as a fuel
C.for lining the inside of the reactor
D.for reducing the velocity of neutrons
Category: Chemical Engineering Mcqs
When a radioactive element emits an ?-particle it becomes
A.electrically negative
B.electrically positive
C.neutral
D.none of the above
An increase in the carbide/graphite ratio in cast iron tends to
A.increase the hardness
B.increase the brittleness
C.decrease the ductility
D.all of the above
If pH = 5 then [H+] in moles/litre is
A.5 x 10-1
B.0.0005
C.6 x 10-5
D.0.00001
The bulk modulus of elasticity for an incompressible fluid is
A.0
B.?
C.1
D.equal to its density
Isotopes of an element have different
A.chemical properties
B.nuclear charge
C.electronic configuration
D.mass number
When incomplete combustion loss is excessive the flue gas analysis reveals large amount of
A.carbon dioxide
B.carbon monoxide
C.oxygen
D.carbon
Crude petroleum consists of
A.84-87 per cent carbon and 11-14 per cent hydrogen
B.11-14 per cent carbon and 84-87 per cent hydrogen
C.54 per cent carbon and 25 per cent hydrogen
D.70-72 per cent carbon and 5-7 per cent hydrogen
The internal energy of a substance
A.decreases with increase in temperature
B.increases with increase in temperature
C.ramains unaffected with change in temperature
D.can be calculated by the relation E = mc2
If S represents the amount available after n interest periods for an initial pincipal P with the discrete compound interest rate i the present worth can be determined by
A.Present worth = S/(1 + i)n
B.Present worth = S/ein
C.Present worth = S/(1 + in)
D.Present worth = S/(1 + n)
