General Studies Quiz

1.The oil in the wick of an oil lamp rises up due to
(a)pressure difference (b)capillary action
(c)low viscosity of oil (d)gravitational force

2.The Function of the choke is to 
(a)give relatively large impedance of alternating current
(b)give relatively large impedance of direct current
(c)regulate the voltage
(d)increase the voltage
3.If the length of a heater coil is reduced by 10% of its original length, then power consumed by the heater will
(a)increase over 10%     (b)decrease by 10%
(c)increase by 0.5 % (d)decrease by 0.5 %
4.A red light is used in a traffic signal because
(a)it has the longest wavelength and can be easily noticed from a long distance (b)it is beautiful
(c)it is visible to people even with bad eyesight 
(d)none of these
5.The most convenient colour combination  that can be used for vehicles running day and night is
(a)orange and blue (b)white and black
(c)red and green (d)yellow and blue
6.Metals are good conductors of  electricity because 
(a)they contain free electrons
(b)the atoms are lightly packed
(c)they have high melting point 
(d)all of the above 
7.When iron and wood are exposed to 
sunlight, the iron rod becomes hot quickly because
(a)greater thermal conductivity of iron
(b)lower thermal conductivity of iron
(c)more density of iron (d)less density of iron
8.Water connot be used to extinguish fire caused by an electric current because 
(a)it may cause another short circuit
(b)it may cause hydrolysis (c)it may cause electrocution
(d)it will spoil the wiring
9.In diesel engines ignition takes place by
(a)compression (b)electrical spark
(c)dynamo (d)batter 
10.A sprayer works on the principle of 
(a)newton (b)Archimedes (c)bovle   (d)pasca 

Answer
1-b,2-a, 3-a, 4-a, 5-c, 6-a, 7-a, 8-a, 9-a, 10-d