RSSB Lab Attendant cheat sheet
RSSB Lab Attendant · Keep the key ideas within reach.
General Knowledge and Current Affairs (Rajasthan and India)
Rajasthan has 33 districts (since 2023, when the new districts were carved out); earlier the count was 33 after the 2019 creation of additional districts, so verify current notification before answering.
Rajasthan Day (Rajasthan Diwas) is observed on 30 March, commemorating the formation of the state in 1949 through the merger of princely states.
The Rajasthan Legislative Assembly has 200 elected seats; the state sends 25 members to the Lok Sabha and 10 to the Rajya Sabha.
The Chief Minister of Rajasthan is the head of the state government; the Governor is the constitutional head appointed by the President of India.
India's current President (as of 2024) is Droupadi Murmu, the 15th President and the first tribal woman to hold the office.
Key national current-affairs topics for exams: Union Budget, RBI monetary policy, ISRO missions (Chandrayaan-3 landed near the lunar south pole in 2023), G20 summit, and major sports events.
Rajasthan's High Court is located at Jodhpur; the state's first woman Chief Minister was Vasundhara Raje.
India's Parliament consists of the President, Rajya Sabha (max 250 members) and Lok Sabha (max 552 members).
Rajasthan General Knowledge, Culture, and Geography
The Thar Desert (Marusthali) covers roughly 60% of Rajasthan; the Aravalli range is the oldest fold mountain range in the world and divides the state into eastern fertile plains and western desert.
Mount Abu (Guru Shikhar, 1,722 m) is the highest peak of Rajasthan, located in the Sirohi district on the Aravalli range.
Major rivers: Chambal (perennial, forms the boundary with Madhya Pradesh), Luni (inland drainage, ends in the Rann of Kachchh), Banas (only river entirely within Rajasthan), and Mahi.
Folk dances: Ghoomar (Rajasthan's most famous, performed by women), Kalbelia (UNESCO Intangible Cultural Heritage, associated with the Kalbelia snake-charmer community), Gair, Chari, and Tera Tali.
Forts: Chittorgarh, Kumbhalgarh, Ranthambore, Amber, Jaisalmer, and Gagron are UNESCO World Heritage Hill Forts of Rajasthan.
Festivals: Pushkar Camel Fair (Kartik month), Desert Festival (Jaisalmer), Teej (Jaipur), Gangaur, and Marwar Festival.
Traditional crafts: Bandhani and Leheriya textiles, blue pottery of Jaipur, Thewa art of Pratapgarh, and Kathputli (string puppet) theatre.
Rajasthan's climate is arid to semi-arid; the state receives most rainfall from the southwest monsoon between June and September, with Mewar receiving more than Marwar.
Basic Mathematics and Reasoning
Percentage: part = (percent/100) × whole; percentage change = (new − old)/old × 100.
Average = sum of values / number of values; if a value is added, new average = (old sum + value)/(n+1).
Simple interest = P × R × T / 100; compound amount = P(1 + R/100)^T.
Speed–distance–time: distance = speed × time; to convert km/h to m/s multiply by 5/18.
Ratio and proportion: if a:b = c:d, then ad = bc; divide a quantity in ratio m:n by parts of m/(m+n) and n/(m+n).
Number series reasoning: check differences, then ratios, then alternating patterns; squares/cubes (1, 4, 9, 16, … or 1, 8, 27, …) are common.
Coding-decoding: assign alphabet positions A=1 … Z=26; reverse position = 27 − position.
Blood relations and direction sense: draw a diagram; for direction, net displacement uses Pythagoras when turns are at right angles.
Hindi Language and Grammar
स्वर 11 और व्यंजन 33 होते हैं; हिंदी में वर्णमाला में कुल 44 वर्ण माने जाते हैं (स्वर + व्यंजन)।
संज्ञा के भेद: व्यक्तिवाचक, जातिवाचक, भाववाचक, समूहवाचक, द्रव्यवाचक।
सर्वनाम के भेद: पुरुषवाचक, निजवाचक, प्रश्नवाचक, संबंधवाचक, निश्चयवाचक, अनिश्चयवाचक।
क्रिया के भेद: सकर्मक (जिसमें कर्म हो) और अकर्मक (जिसमें कर्म न हो); तथा प्रेरणार्थक क्रिया।
काल तीन प्रकार के: वर्तमान, भूत, भविष्य; प्रत्येक के सामान्य, अपूर्ण, पूर्ण और संदिग्ध रूप होते हैं।
संधि: स्वर संधि, व्यंजन संधि, विसर्ग संधि; उदाहरण - विद्या + आलय = विद्यालय (दीर्घ स्वर संधि)।
समास के भेद: तत्पुरुष, कर्मधारय, द्विगु, द्वंद्व, बहुव्रीहि, अव्ययीभाव।
अलंकार: अनुप्रास (वर्णों की आवृत्ति), उपमा (समानता), रूपक (अभेद आरोप), उत्प्रेक्षा (संभावना)।
English Language
Parts of speech: noun, pronoun, verb, adjective, adverb, preposition, conjunction, interjection.
Subject-verb agreement: singular subject takes singular verb; 'each, every, either, neither' take singular verbs.
Tenses: simple present (habit/fact), present continuous (ongoing), present perfect (past action with present relevance: has/have + past participle).
Active to passive: object becomes subject + be + past participle + by + agent (e.g., 'She writes a letter' → 'A letter is written by her').
Direct to indirect speech: change pronouns to match the reporter, change tense one step back if the reporting verb is past, and adjust time/place words (now → then, today → that day).
Articles: 'a/an' for indefinite (a before consonant sound, an before vowel sound), 'the' for definite or unique references.
Common prepositions: 'since' with a point of time, 'for' with a duration; 'between' for two, 'among' for more than two.
Synonyms/antonyms and one-word substitutions are frequent: e.g., 'philanthropist' = lover of mankind, 'omnipresent' = present everywhere.
Laboratory Assistance, Safety, and Equipment Handling
Always wear PPE: lab coat, safety goggles, gloves; tie back long hair and avoid loose clothing near flames.
Never pipette by mouth; use a pipette bulb or mechanical pipettor.
Acids and bases: always add acid to water, never water to acid, to avoid violent exothermic spattering.
Know the location of the eyewash station, safety shower, fire extinguisher, and first-aid kit before starting work.
Chemical storage: separate acids from bases and oxidizers; store flammable solvents in a fire-rated cabinet away from ignition sources.
Glassware: inspect for cracks before use; heat test tubes at an angle and point the mouth away from people.
Spill response: alert others, evacuate if volatile, use the appropriate absorbent, and report to the supervisor; never use water on a solvent fire.
Balance use: level the balance, zero/tare before weighing, use a weighing boat, and record the reading with correct significant figures.
Basic Science (Physics, Chemistry, Biology)
Newton's laws: F = ma; an object at rest stays at rest unless acted on by a net force; every action has an equal and opposite reaction.
SI units: length metre (m), mass kilogram (kg), time second (s), force newton (N), energy joule (J), power watt (W), temperature kelvin (K).
Ohm's law: V = IR; power P = VI = I²R; series resistance adds, parallel resistance uses 1/R = 1/R₁ + 1/R₂.
Atomic structure: protons (+), neutrons (neutral), electrons (−); atomic number = number of protons; mass number = protons + neutrons.
pH scale: 0–14; pH < 7 acidic, pH = 7 neutral, pH > 7 basic; litmus turns red in acid and blue in base.
Photosynthesis: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, occurring in chloroplasts using chlorophyll and sunlight.
Human body: the heart has four chambers; the lungs exchange gases via alveoli; blood has plasma, RBCs, WBCs, and platelets.
Cell organelles: nucleus (control), mitochondria (energy/ATP), ribosome (protein synthesis), chloroplast (photosynthesis in plants).