Related Questions

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
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
D.C. generators are normally designed for maximum efficiency around
A Full load
B Rated r.p.m.
C Rated voltage
D All of the above
The watt-hour efficiency of a lead-acid cell varies between
A 25 to 35%
B 40 to 60%
C 70 to 80%
D 90 to 95%
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 insulating material used between the commutator segments is normally
A Graphite
B Paper
C Mica
D Insulating varnish
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
A 0.5 D
B D
C 1.5 D
D 2 D
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
A Zero
B $$\frac{1}{5}$$
C $$\frac{4}{5}$$
D 1
When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
A $$\frac{1}{4}$$
B Zero
C $$\frac{1}{5}$$
D 2

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