Science Quiz: Day 07

November 7, 2022

Which of the following measurements is not a unit of distance?

(A) Ammeter
(B) Cubit
(C) Parsec
(D) Angstrom

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Answer – A

Which one of the following remains constant while throwing a ball upward?

(A) Displacement
(B) Kinetic Energy
(C) Acceleration
(D) Velocity

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Answer – C

Pure water freezes at what temperature?

(A) 47 F
(B) 32 F
(C) 0 F
(D) 19 F

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Answer – B

Zinc Oxide is

(A) Acidic
(B) Basic
(C) Neutral
(D) Amphoteric

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Answer: D

Which of the following statements is not true regarding LASER?

(A) LASER is a device that emits light through a process of optical amplification
(B) LASER beams can be focused to very tiny spots, achieving a very high irradiance.
(C) The emitted LASER light is notable for its high degree of dispersive power unattainable using other technologies.
(D) LASER light is used in bar-code scanners

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Answer: C

A tourist, who plans to visit a hill station located at very high altitude also wishes to take along his Television Set. In this context, consider the following : LCD TV, Plasma TV , Cathode Ray Tube TV. Which among the above are expected to work properly at very high altitudes?

(A) Only 1
(B) 1 and 2
(C) 1 and 3
(D) 2 and 3

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Answer – C

Plasma TV is a television display technology in which each pixel on the screen is illuminated by a tiny bit of plasma (it can change its behaviour at high altitude). The cathode ray tube (CRT) is a vacuum tube that contains one or more electron guns .The first commercially made electronic television sets with cathode ray tubes were manufactured by Telefunken in Germany in 1934.

If an egg with shell is placed in a microwave oven, which among the following would most likely happen?

(A) The egg will not get warmed
(B) The egg will get cooked slowly similar to a boiled egg
(C) The egg shell will explode
(D) The egg shell becomes yellow

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Answer – C

A microwave can heat unevenly, in the case of an egg the centre of the egg yoke heats up first. An egg yoke can explode on its own without the shell or egg white around it.

Which among the following phenomena of the optics makes the Endoscopy capable of examining the internal organs such as Abdomen?

(A) Interference
(B) Total Internal Reflection
(C) Diffraction
(D) Scattering

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Answer: B

A person is standing in front of a wall and makes a sound. What should be the normal minimum distance between the person and the wall , so that the person hears echo?

(A) 6 meters
(B) 13 meters
(C) 20 meters
(D) 17 meters

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Answer: D

How does the Isotope of Iodine, Iodine-135 plays an important role in Nuclear Power Generation?

(A) It is used as a fuel supplement in some of the modern Nuclear Reactors
(B) It is a bi-product of Nuclear Reaction which kills the neutrons and this inhibits the power formation
(C) It is a moderator used actively in the Nuclear Reactors
(D) It is an experimental substance for Nuclear Fusion

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Answer – B

Which among the following is measured by an Odometer?

(A) Pressure
(B) Height
(C) Distance
(D) Velocity

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Answer: C

Consider the following advantages of the Optic Fibres and the Copper wires:
1. Optic Fibres are NOT susceptible to the electrical interference
2. Optic Fibres can be used to transmit more signals than Copper Wires
3. Optic Fibres can carry a signal over a single fibre, unlike the electricity which requires a pair of Copper wires.
Which among the above stand correct ?

(A) Only 1 is correct
(B) Only 1 & 2 are correct
(C) All 1, 2 & 3 are correct
(D) Only 3 is correct

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Answer – C

Which among the following waves are most commonly used in the Night Vision Devices?

(A) Microwaves
(B) Infra Red Waves
(C) Ultra Violet Waves
(D) Radio Waves

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Answer: B

Infra-red waves are used in night vision apparatus as these are very low energy radiation waves which are available below red rays on the visible spectrum, so (b) is correct.

Which among the following is the most common cause of Sunburn?

(A) Ultraviolet Radiation
(B) Visible Radiation
(C) Infrared Radiation
(D) Microwave Radiation

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Answer – A

Which among the following are used in Computed tomography (CT) Scan?

(A) X-Rays
(B) Ultrasound
(C) Infrared waves
(D) Radio Waves

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Answer – A

An electrical fuse is used to interrupt excessive ?

(A) Voltage
(B) Current
(C) Resistance
(D) Inductance

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Answer: B

Which among the following is the most acceptable range of LEO (Low Earth orbit)?

(A) 350 - 2,600 kms
(B) 200 - 2000 kms
(C) 160 - 2,000 kms
(D) 160 -1600 kms

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Answer : C

Ultrasound which is upper limit of human hearing is characterized by which of the following frequencies?

(A) Above 20 KHz
(B) Above 200 KHz
(C) Above 2 KHz
(D) Below 20 KHz

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Answer : A

Which among the following is the science dealing with Colors?

(A) Optics
(B) Chromatics
(C) Ophthalmology
(D) Otology

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Answer : B

Mach number is a measure of which of the following?

(A) Speed
(B) Heat Transfer
(C) Static Pressure
(D) Volume

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Answer : A