Explore topic-wise MCQs in 3rd Class.

This section includes 1249 Mcqs, each offering curated multiple-choice questions to sharpen your 3rd Class knowledge and support exam preparation. Choose a topic below to get started.

851.

Muscles of our body can:

A. Contract                       
B. Expand
C. Both [a] and [b]  
D.       Either [a] or [b]
E. None of these
Answer» D.       Either [a] or [b]
852.

This gas is produced by our body as a waste material.

A. Oxygen                        
B. Carbon dioxide
C. Nitrogen oxide
D.        Carbon monoxide
E. None of these
Answer» C. Nitrogen oxide
853.

Which among the following is a body waste?

A. Blood                           
B. Saliva
C. Sweat  
D. Cell
E. None of these
Answer» D. Cell
854.

The process of breathing includes:

A. Inhaling air                    
B. Exhaling air
C. Both [a] and [b]  
D.        Either [a] or [b]
E. None of these
Answer» D.        Either [a] or [b]
855.

Match the following: Column A Column B (i) Stomach [A] Respiratory system (ii) Lungs [B] Nervous system (iii) Blood [C] Circulatory system (iv) Brain [D] Digestive system

A. (i-D), (ii-A), (iii-C), (iv-B)
B. (i-D), (ii-C), (iii-A), (iv-B)
C. (i-B), (ii-A), (iii-D), (iv-C)
D. (i-C), (ii-D), (iii-A), (iv-B)
E. None of these
Answer» B. (i-D), (ii-C), (iii-A), (iv-B)
856.

My work is to pump blood to all tissues in your body. Who am I?

A. Brain                            
B. Heart
C. Eye                              
D. Lungs
E. None of these
Answer» C. Eye                              
857.

I am present throughout your body and helps you to move and to lift objects. Who am I?

A. Hands                          
B. Legs
C. Feet                             
D. Muscles
E. None of these
Answer» E. None of these
858.

_____ are the smallest unit of our body.

A. Tissues                         
B. Cells
C. Muscles         
D.        Organs
E. None of these
Answer» C. Muscles         
859.

Raghav is eating chocolate and he finds it sweet. Which sense organ enables him to taste?

A. Nose                            
B. Ear
C. Tongue          
D.        Finger
E. None of these
Answer» D.        Finger
860.

To break a glass tile by hands, one needs to use one's _______ system.

A.  Reproductive 
B.         Skeletal                      
C.         Muscular                
D.         Both (b) and (c)
Answer» E.
861.

The organ system by which young ones are produced.

A. Respiratory system
B. Reproductive system
C. Nervous system
D. Excretory system
E. None of these
Answer» C. Nervous system
862.

Select the correct option regarding the organ system shown here.

A.  If part P is removed, food will not be masticated and absorbed.
B.         If part Q is removed, water from food will not be absorbed.
C.         If part R is removed, complete digestion of all food components will not take place.
D.         None of these
Answer» E.
863.

Which among the following is not a part of nervous system?

A. Brain                            
B. Spinal cord
C. Ribs             
D. Nerves
E. None of these
Answer» D. Nerves
864.

The given picture shows two organ systems of our body, X and Y. Select the correct statement about these systems.

A.  System X helps in movement while system Y helps body to get rid of wastes.
B.         System X and Y work together to help body to move.
C.         System X supplies blood to different body parts while system Y helps to produce babies.
D.         None of these
Answer» C.         System X supplies blood to different body parts while system Y helps to produce babies.
865.

Exhalation of air means:

A. Taking up air inside        
B. Giving out air
C. Both [a] and [b] 
D.        Either [a] or [b]
E. None of these
Answer» C. Both [a] and [b] 
866.

Read the given statements made by four students.Priya - I love the smell of wet soil after rains.Shruti - My hair feel so rough after using this new shampoo.Om - Watch out! You can slip on this banana peel.Sam - I just love the musical sound made by wind chymes hanging at the door of my living room. Now, select the correct option regarding this. 

A. Priya used the sense which helps us to choose a good perfume.
B. Shruti used the sense which helps us to identify a red and a blue object.
C. Om used the sense which helps us to respond to a phone's ring.
D. Sam used the sense which helps to differentiate between a hot and a cold coffee.
Answer» B. Shruti used the sense which helps us to identify a red and a blue object.
867.

How many lungs do you have in your body?

A. One                 
B. Two
C. Three               
D. Four
E. None of these
Answer» C. Three               
868.

Beena, Shalu and Navpreet wanted to find out who among them had the biggest lung capacity. They decided to blow into a balloon with one breath and see how big it will become. Which of the following factors they must keep the same to make the test a fair one?1. Colour and design pattern of the balloon2. Size and shape of the balloon3. When to breathe in forcibly before blowing4. Material, balloon is made of 

A. 1 and 2 only   
B. 2 and 3 only   
C. 1, 3 and 4 only           
D. 2, 3 and 4 only
Answer» E.
869.

_____ act as messengers for brain to send instructions to sense organs.

A. Cells                 
B. Nerves
C. Tissues                         
D. Blood
E. None of these
Answer» C. Tissues                         
870.

Study the given diagram, Which of the following represents the small intestine?                

A. W                   
B. X                            
C. Y                    
D. Z
Answer» D. Z
871.

Which one of the following organs is a part of respiratory system?

A. Pancreas                       
B. Stomach
C. Trachea  
D. Intestine
E. None of these
Answer» D. Intestine
872.

What happens when we touch a hot kettle?

A.  Skin\[\to \]Nerves\[\to \]Hand is pulled back
B.         Skin\[\to \]Nerves\[\to \]Spinal cord\[\to \]Nerves\[\to \]Hand is pulled back
C.         Skin\[\to \]Brain\[\to \]Nerves\[\to \]Hand is pulled back
D.         None of these
Answer» C.         Skin\[\to \]Brain\[\to \]Nerves\[\to \]Hand is pulled back
873.

I am present inside human body and controls all the activities of human body?

A. Stomach                       
B. Eyes
C. Hands                 
D.    Brain
E. None of these
Answer» E. None of these
874.

Sameer uses dumbbell to exercise. Which body systems are involved in bending and straightening of the arm?        

A.  Muscular and Excretory systems
B.         Digestive and Nervous systems   
C.         Muscular and Skeletal systems  
D.         Skeletal and Reproductive systems
Answer» D.         Skeletal and Reproductive systems
875.

The given figure shows the human digestive system. In which labelled part food is both masticated and partially digested?

A.  P                                
B.         Q                   
C.         R                                
D.         S
Answer» B.         Q                   
876.

Match the following: Column A Column B (i) Skeletal system [A] help in digestion of food (ii) Digestive system [B] Help in inhaling and exhaling (iii) Nervous system [C] Gives shape to our body (iv) Respiratory system [D] Controls activities of our body

A. (i - D), (ii - C), (iii - B), (iv ? A)   
B. (i - C), (ii - A), (iii - D), (iv - B)
C. (i - B), (ii - A), (iii - D), (iv - C)      
D. (i - C), (ii - D), (iii - B), (iv - A)
E. None of these
Answer» C. (i - B), (ii - A), (iii - D), (iv - C)      
877.

Which organ among the following is not included in digestive system?

A. Stomach          
B. Small intestine
C. Mouth           
D.        Oesophagus
E. None of these
Answer» F.
878.

Substances abundant in the dull, purplish red blood in the veins are _____.(a) Nutrients(b) Oxygen(c) Carbon dioxide(d) Waste materials 

A. (a) and (b) only           
B. (b) and (d) only                      
C. (a) and (c) only      
D. (c) and (d) only
Answer» E.
879.

Which is the longest bone in human body?

A. Thighbone  
B. Backbone
C. Leg bone           
D.        Upper arm bone
E. None of these
Answer» B. Backbone
880.

Framework formed by the bones of our body is:

A. Spinal cord       
B. Skeletal system
C. Muscular system 
D.       Nervous system
E. None of these
Answer» C. Muscular system 
881.

This system protects the inner body parts from getting injured.

A. Circulatory system         
B. Digestive system
C. Skeletal system   
D.       Excretory system
E. None of these
Answer» D.       Excretory system
882.

Abhishek blew hard on a mirror surface. He observed that the mirror became misty because of tiny water droplets that formed on the mirror. What can he conclude from this activity?    

A.  Carbon dioxide is given off when we exhale,                
B.         Oxygen is given off when we exhale.                      
C.         Water vapours are given off when we exhale.               
D.         None of these
Answer» D.         None of these
883.

Match the columns and select the correct option.Column IColumn II(a) Excretory system1. Kidney(b) Digestive system2. Blood(c) Nervous system3. Liver(d) Circulatory system4. Brain(e) Skeletal system5. Heart 6. Bones 7. Lungs 

A. (a)-2, (b)-3, (c)-4, (d)-5, (e)-6
B. (a)-1, (b)-3, (c)-6, (d)-2, (e)-5
C. (a)-3, (b)-6, (c)-4, (d)-5, (e)-2
D. (a)-1, (b)-3, (c)-4, (d)-2, (e)-6
Answer» E.
884.

Number of bones in human body are:

A. 204                  
B. 203
C. 206    
D.        205
E. None of these     
Answer» D.        205
885.

_______ is the only organ system that consists of different organs in a man and a woman.

A.  Nervous system               
B.         Reproductive system
C.         Circulatory system              
D.         Respiratory system
Answer» C.         Circulatory system              
886.

Select the one that does not belong to that organ system to which the other three belong.

A.  Brain                         
B.         Spinal cord                
C.         Nerves                       
D.         Lungs             
Answer» E.
887.

____ is the house used by the people who keep moving from one place to another.

A.                     
B.                 
C.                        
D.         
Answer» D.         
888.

 _____ is an example of synthetic fibre.

A.  Nylon                   
B.         Acrylic           
C.         Polyester                    
D.         All of these
Answer» E.
889.

A/An ______ can be made using the materials shown here.

A.  Igloo               
B.         Houseboat                 
C.         Caravan        
D.         Pucca house
Answer» E.
890.

Select the correct statement about the clothes made of fibre obtained from the animal shown here.      

A.  They do not trap air.
B.        They keep us warm.
C.         They are waterproof.
D.              They cannot be burnt.                
Answer» C.         They are waterproof.
891.

The person shown in the given figure is supposed to be in his ____.      

A.  Bathroom                  
B.         Kitchen                      
C.         Dining room  
D.         Bedroom
Answer» E.
892.

DIRECTION: Refer to the given word grid and answer the question.             How many of these fibres are obtained from animals?

A.  Two                           
B.         Five                           
C.         Six                             
D.         One
Answer» B.         Five                           
893.

DIRECTION: Refer to the given word grid and answer the question.             How many names of different fibres are hidden In the given word grid?     

A.  Seven                         
B.         Three                         
C.         Six                             
D.         Four               
Answer» C.         Six                             
894.

Select the option in which INCORRECT odd member is encircled.

A.  Nylon, Acrylic, Polyester,
B.         Tent, Caravan, Houseboat,
C.         Cotton, Silk, , Wool       
D.         Raincoat,  Skirt, T-shirt            
Answer» E.
895.

DIRECTION: Refer to the given picture and answer the question. Savitri is a nomad. To earn bread, she works as a helper in three homes which are on different floors. She lives in a and works in b. Which of the following options correctly identifies a and b in the figure?

A.  a-3, b-1          
B.         a-2, b-1          
C.         a-3, b-2          
D.         a-2, b-3
Answer» D.         a-2, b-3
896.

DIRECTION: Refer to the given picture and answer the question. The given houses can be grouped into two as ______.

A.  Portable and temporary houses
B.         Movable and portable houses
C.         Temporary and permanent houses
D.         Permanent and skyscraper houses
Answer» D.         Permanent and skyscraper houses
897.

Study the given flow chart carefully.       Cotton and silk are represented by the letters ____ and ____ respectively.                         

A.  P, Q                           
B.         Q, R                       
C.                                             Q, S                           
D.         R, S
Answer» C.                                             Q, S                           
898.

Which of these can explain the reason for mud houses being common in desert areas like Rajasthan?

A.  Mud houses remain comparatively cooler in summers.
B.         Rainfall is very scarce in Rajasthan.
C.         The roofs are made of thorny bushes.
D.         Both (a) and (b)
Answer» E.
899.

Select the correct match of the place and the houses commonly found there.

A.           
B.         
C.         
D.         All of these
Answer» E.
900.

Which of the following items are used for cleaning purposes in the house?

A.  (a) and (b) only          
B.         (b), (c) and (d) only   
C.         (c) and (d) only          
D.        (a), (b), (c) and (c)
Answer» C.         (c) and (d) only