The laws of reflection hold good for _________?
A. Plane mirror only
B. Concave mirror only
C. Convex mirror only
D. All mirrors irrespective of their shape
Correct Answer: All mirrors irrespective of their shape
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Here, you may find CSS Optional Subjects MCQs. If you want to prepare MCQs of optional subjects, CSS MCQs platform is here to serve you while preparing your MCQs portion of your CSS Exam. Please practice these CSS Optional Subjects MCQs on a daily basis.
Which of the following is NOT true about light?
A. It is a form of electromagnetic radiation.
B. It travels at the fastest speed in vacuum.
C. It can be polarized.
D. It is made up of tiny particles called photons.
Correct Answer: D
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Echinoderms live in which water?
A. Freshwater
B. Terrestrial
C. Marine
D. Both freshwater and terrestrial
Correct Answer: C) Marine
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What is the function of the water vascular system in echinoderms?
A. Circulation of blood
B. Movement and feeding
C. Excretion
D. Respiration
Correct Answer: B) Movement and feeding
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What is the unit of measurement for sound intensity?
A. Decibel (dB)
B. Hertz (Hz)
C. Watt (W)
D. Joule (J)
Show Answer…Correct Answer: A) Decibel (dB)
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How does water affect the transmission of sound through air?
A. Amplifies the sound
B. Muffles the sound
C. Redirects the sound
D. Has no effect on the sound
Correct Answer: B. Muffles the sound
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In which country is the Golden Gate Bridge located?
A. USA
B. Canada
C. Mexico
D. Brazil
Correct answer: A. USA
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