Physics problems
- 1. Rear view mirror of car is convex or concave?
Options- A. Convex
- B. Concave
- C. Both A & B
- D. Can't be determined Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Convex
Explanation:
The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."
- 2. What is the escape velocity of the rocket in the earth is?
Options- A. 12.2 km/sec
- B. 10.2 km/sec
- C. 13.2 km/sec
- D. 11.2 km/sec Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: 11.2 km/sec
- 3. The flux commonly used in brazing is
Options- A. Ammonium chloride
- B. Borax
- C. Zinc chloride
- D. Resin plus alcohol Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Borax
- 4. Gear finishing operation is called
Options- A. Burnishing
- B. Hobbing
- C. Shaping
- D. Milling Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Burnishing
Explanation:
Gear finishing operation is called Burnishing.
- 5. The mechanism of material removal in EDM process is
Options- A. Erosion and Cavitations
- B. Cavitations and Evaporation
- C. Melting and Evaporation
- D. Melting and Corrosion Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Melting and Evaporation
Explanation:
Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges.
- 6. Cryogenic Engines find applications in
Options- A. Frost - Free refrigerators
- B. Sub-marine propulsion
- C. Researches in superconductivity
- D. Rocket technology Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Rocket technology
Explanation:
Cryogenic Engines find applications in Rocket technology. A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel or oxidizer, that is, its fuel or oxidizer are gases liquefied and stored at very low temperatures. Notably, these engines were one of the main factors of NASA's success in reaching the Moon by the Saturn V rocket.
- 7. One light year is approximately equal to
Options- A. 10^12 mts
- B. 10^16 mts
- C. 10^11 mts
- D. 10^13 mts Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO, Database Administrator
Correct Answer: 10^16 mts
Explanation:
Light year is the unit of to express astronomical distances, that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 9,500,000,000,000 kilometers.
Approximately, 1 light year = 10^16 mts.
- 8. Speed in a given direction is called
Options- A. Velocity
- B. Torque
- C. Acceleration
- D. Displacement Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Velocity
Explanation:
Speed in a given direction is called Velocity.
- 9. Rotameter is used to measure
Options- A. Vortex flow
- B. Density of fluids
- C. Velocity of fluid in pipes
- D. Flow of fluids Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Flow of fluids
Explanation:
A rotameter is a flow meter that measures volumetric flow of liquids and gases.
- 10. Centrifugal force increases with
Options- A. Temperature
- B. Pressure
- C. Acceleration
- D. Humidity Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Acceleration
Explanation:
Centrifugal force is the fictitious force that pulls out from the center on the body we feel while moving in the circular path. It increases with the rate of rotation of the axis i.e, acceleration of the body.
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