In case of cored aluminium castings, the contraction allowance is
A.more than the normal allowance
B.less than the normal allowance
C.same as the normal allowance
Author: BILAL KHATTAK
Which of the following does not change during an-ideal throttling process?
A.Enthalpy
B.Enthalpy and temperature
C.Temperature and pressure
D.Pressure and volume
E.Pressure, volume and temperature
Mullerian mimcry is useful to:?
A.Mimic only
B.Model only
C.Both (a)
B.Model only
C.Both (a)
Steam condenser tubes are generally made of
A.Admiralty alloy
B.Babbit metal
C.Brass
D.Bronze
E.Bell metal
Great apes and Man have which of the following similarities:
A.Absence of tail
B.Browridges
C.Increased cranial capacity
D.All of these
An azeotropic mixture of two liquids has boiling point higher than either of them when it
A.is saturated
B.shows negative deviation from Raoults law
C.shows positive deviation from Raoults law
D.shows no deviation from Raoults law
Which of the following marine form is more susceptible for extinction?
A.Corals
B.Gastropods
C.Fishes
D.Reptiles
Which of these is not a voluntary response:
A.Courtship in animals
B.Blinking of eyes when something falls in it
C.Copulation in animals
D.Catching prey by animal
In a newly charged ammonia compression system, the clicking sound in the expansion valve indicates
A.High pressure after compression
B.Excessive ammonia charged
C.Lack of ammonia
D.Evaporator coils chocked
E.Leakage of ammonia
Two ionic layers are present in:
A.Troposphere
B.Mesosphere
C.Hetrosphere
D.Thermosphere
