Everyday Science MCQs 19

Which of the following is primarily composed of calcium carbonate?
(a) Fish scales
(b) Shark teeth
(c) Oyster Shells-✔️
(d) Whale bones

Which of the following is not a property of difference amplifier?
(a) Capacitor is used in it-✔️
(b) It is used to compare two signals
(c) Difference amplifier yields more than the direct couple ampliier
(d) Frequency of difference amplifier remains flat from zero to high frequency

Which of the following is a rich source of energy?
(a) Protein
(b) Lipid-✔️
(c) Carbohydrate
(d) Vitamin

Which of the following is a cellulose fiber?
(a) Cotton-✔️
(b) Wool
(c) Rayon
(d) Polyester

Which of the following gases is released from rice fields in the most prominent quantities?
(a) Carbon dioxide
(b) Methane-✔️
(c) Carbon monoxide
(d) Sulphur dioxide

Which colour of heat radiation represents the highest temperature?
(a) Blood red
(b) Dark cherry
(c) Salmon
(d) White-✔️

Which among the following substances is used as a lubricant?
(a) Quartz
(b) Silica
(c) Graphite-✔️
(d) Nickel

What power cycle is used in jet engines?
(a) Stirling
(b) Rankine
(c) Otto
(d) Brayton-✔️

What is the pH value of pure water?
(a) 1
(b) 6
(c) 7-✔️
(d) 10

What is Jeweller's rouge?
(a) Ferric oxide-✔️
(b) Ferrous oxide
(c) Ferrous carbonate
(d) Ferric carbonate