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RPF Constable General Science and Everyday Applications — practice questions

Explore 18 free General Science and Everyday Applications questions in RPF Constable General Awareness. Open each question or exercise to read its content, reference answers and available explanation.

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General Science and Everyday Applications questions and exercises with answers

Showing questions 1–18 of 18.

Match Cell Organelles to RolesRead the answer and worked solution →Why is a steel saucepan often fitted with a plastic handle?Read the answer and worked solution →On a sunny afternoon, land warms faster than the sea. Which airflow forms a sea breeze?Read the answer and worked solution →A word looks reversed left-to-right in a plane mirror. Which other description of its image is correct?Read the answer and worked solution →A straight straw partly in water appears bent at the surface. Which explanation is correct?Read the answer and worked solution →A bell still vibrates in a jar, but gets fainter as air is removed. Why?Read the answer and worked solution →Two tones have the same frequency, but tone P has a larger amplitude. How does P compare with the other tone?Read the answer and worked solution →A solenoid’s turns are doubled and its current halved. Its length and core are unchanged. How does its magnetic-field strength change?Read the answer and worked solution →A correctly rated fuse protects a household circuit during excessive current mainly by doing what?Read the answer and worked solution →Which plan best interrupts cholera’s usual route of spread?Read the answer and worked solution →Match heat transfer: along a metal spoon; circulating water; sunlight through space.Read the answer and worked solution →A child stands 1.5 m from a plane mirror, then moves 0.5 m towards it. What is the new child-to-image distance?Read the answer and worked solution →Resistors of 6 Ω and 3 Ω are in parallel across an ideal 6 V battery. What are the total current and power?Read the answer and worked solution →Bulbs rated 60 W and 40 W at 200 V are connected in series across 200 V. Assume constant resistance. Which bulb uses more power, and what is total power?Read the answer and worked solution →A 4 Ω resistor is in series with a parallel pair of 6 Ω and 3 Ω across 12 V. Find total current and power in the 3 Ω resistor.Read the answer and worked solution →Two 12 Ω resistors run across 12 V: first in series for 1 min, then in parallel for 1 min. What total energy is used?Read the answer and worked solution →A lamp rated 100 W at 200 V runs at 100 V for 5 h. Assume constant resistance. At ₹8 per kWh, what does it cost?Read the answer and worked solution →Everyday science resultsRead the answer and worked solution →

Worked practice questions

Match Cell Organelles to Roles

Read exercise and reference answers
Matching pairs
  1. Left
    Mitochondria
    Right
    Powerhouse (ATP)
  2. Left
    Ribosomes
    Right
    Protein Synthesis
  3. Left
    Lysosomes
    Right
    Suicide Bags (Digestion)
Instructions
Match each item to its correct pair

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Why is a steel saucepan often fitted with a plastic handle?

  1. High thermal conductivity
  2. Low melting temperature
  3. Low thermal conductivity
  4. High electrical conductivity
Show answer and solution

Correct answer: C. Low thermal conductivity

Plastic is a poor heat conductor, so it reduces conduction from the hot pan to the hand.

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On a sunny afternoon, land warms faster than the sea. Which airflow forms a sea breeze?

  1. Warm air above land sinks to the ground
  2. Both land and sea stop heating
  3. Surface air flows from sea to land
  4. Surface air flows from land to sea
Show answer and solution

Correct answer: C. Surface air flows from sea to land

Air rising above the warmer land is replaced near the surface by cooler air from the sea.

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