Related Questions

The ampere-hour efficiency of a leadacid cell is normally between
A 20 to 30%
B 40 to 50%
C 60 to 70%
D 90 to 95%
Which of the following factors adversely affects the capacity of the leadacid battery ?
A Temperature of surroundings
B Specific gravity of electrolyte
C Rate of discharge
D All of the above
If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?
A $$\left( {A + B} \right)\alpha \,C$$
B $$\left( {A - B} \right)\alpha \,\frac{1}{C}$$
C $$\sqrt {AB} \,\alpha \,C$$
D $$\frac{A}{B} = {\text{constant}}$$
The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
A just one
B always greater than one
C always less than one
D none of the above
As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
A compactness
B lower e.m.f.
C small quantity of electrolyte used
D higher internal resistance
Stage efficiency for packed tower varies with the
A Type & size of packing
B Fluid rates and fluid properties
C Operating pressure and column diameter
D All of the above
In asthmatics, mast cell degranulation produced by interaction between antigen and antibody on the cell surface in inhibited by:
A Disodium chromoglycate
B Acetylcholine
C Promethazine
D Cimetidine
E Salbutamol
The temperature in a home freezer varies from 25 degree F to 3 degree F. What is the difference, in Celsius, between these two temperatures?
A 28
B 22
C 27
D 23
The thickness of the topping of a ribbed slab, varies between
A 3 cm to 5 cm
B 5 cm to 8 cm
C 8 cm to 10 cm
D 12 cm to 15 cm
The percentage of carbon in grey iron castings usually varies between
A 0.5 to 1%
B 1.2%
C 2.5 to 4.5%
D 5 to 7%

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