Everyday Science Top MCQs Solved Paper for PPSC SPSC FPSC KPPSC AJKPSC NTS

(43) The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from:

a. Ionosphere
b. Troposphere
c. Mesosphere
d. Stratosphere
e. None of these

(44) Yeast is used in making bread because it produces:

a. Carbon dioxide
b. Sugar
c. Bacteria
d. Oxygen
e. None of these

(45) Oasis is associated with:

a. Glaciers
b. Desert
c. Islands
d. Volcanoes
e. Fertile land

(46) Quartz crystal in quartz watches work on the principle called:

a. Photoelectric effect
b. Stark effect
c. Thermionic effect
d. Piezo-electric effect
e. None of these

Piezo-electric effect
electric polarization produced in certain crystals by the application of mechanical stress. 

(47) The fruits without seed, like banana, are called:

a. seedless fruits
b. parthenogenesis fruits
c. parthenocarpic fruits 
d. placental fruits
e. Organic fruits

parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. The fruit is therefore seedless

(48) Animal which captures and readily kills living animals for its food is called:

a. Parasite
b. Scavenger
c. Predator 
d. Mammal
e. None of these

(49) In a railway track, two rails are joined end to end with a gap tin between them because:

a. Steel can be saved
b. Accidents due to contraction in winter can be avoided
c. Air gaps are necessary for bearing the weight of running train
d. Accidents due to expansion in summer can be avoided
e. All of these

(50) Name the famous book of Ibn-Sina in which he discussed human physiology and medicine:

a. Al-Qanoon
b. Al-Masudi
c. New Renaissance
d. Tadhkira
e. None of these

Everyday Science Top MCQs Solved Paper for PPSC SPSC FPSC KPPSC AJKPSC NTS