Ibn-e-Khaldun classified mankind into
A.five groups
B.two groups
C.three groups
Author: BILAL KHATTAK
Bengal famine was caused due to:
A.Phytophthora infestans
B.Drechslera oryzae
C.Puccinia graminis tritici
D.Heterodera avenage
The percentage by volume of argon in the air is about
A.2.97%
B.0.94%
C.0.01%
D.0.00%
At break-even point, total cost is equal
A.fixed cost
B.variable cost
C.income
D.none of the above
Ecological pyramids are of:
A.Two types
B.Three types
C.Four types
D.Five types
Girdling means:
A.Removal of ring of bark to kill
B.While species, of thick bark, fluted, stem, sylem remains present inside
C.Both (a) & (b)
D.None of these
When earth and moon are nearest that position is called:
A.Apogee
B.Perigee
C.Both of these
The included angle of American National threads is
A.29?
B.47
C.50?
D.55?
E.60?
The permissible pH value of water of boilers is
A.1
B.5
C.7
D.Slightly more than 7
E.Less than 14
The square engine has:
A.Cylinder of square section
B.Combustion chamber of square section
C.Equal bore and stroke
D.Piston of square section
