JOIN ADRE 2.0 Telegram Group

CBSE class 7 Science Quiz | CBSE class 7 Science Objective Type Questions & Answers

Questions
21 The fleece are combed to remove _______
A Burrs.
B Dust.
C Low quality hair.
D None of these

Answer: Burrs.
22 Which country is the most producing silk in the world?
A Bangladesh
B India
C China
D none of these

Answer: China
Advertisement
Article and Schedule Quiz Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

23 Which of the following statements is NOT true?
A Workers in wool industry generally suffer from Sorter's disease.
B Bakhrwal is an Indian breed of sheep.
C Rayon is a natural fibre.
D Shearing is usually done in summer season.

Answer: Rayon is a natural fibre.
24 Sericulture is ________________.
A rearing of silk worms
B rearing of sheep
C cotton plantation
D rearing of honey bees

Answer: rearing of silk worms
25 Removal of wool from a sheep is known as __________.
A Rearing
B Sorting
C Shearing
D Scouring

Answer: Shearing
26 Which of the following process is NOT part of wool extraction?
A Shearing
B Scouring
C Sorting
D Reeling

Answer: Reeling
27 Animal Fibres are made up of
A cellulose
B protein
C nylon
D rayon

Answer: protein
28 Vegetable fibres are made up of
A cellulose
B nylon
C protein
D rayon

Answer: cellulose
29 Which of the following is NOT a Vegetable fibre?
A flax
B silk
C hemp
D jute

Answer: silk
30 Device used for measuring temperatures is called a
A Barometer
B Odometer
C Thermometer
D Speedometer

Answer: Thermometer
31 A polished silvery surface is
A good absorber of heat
B good reflector of heat
C poor reflector of heat
D None of these

Answer: good reflector of heat
32 Sea breeze is caused due to
A conduction
B convection
C radiation
D all of these

Answer: convection
33 A wooden spoon is dipped in a cup of ice cream. Its other end
A becomes cold by the process of conduction.
B becomes cold by the process of convection.
C becomes cold by the process of radiation.
D does not become cold.

Answer: does not become cold.
34 A Thermos flask prevents loss or gain of heat by
A conduction only
B convection only
C radiation only
D all the above

Answer: all the above
35 Boiling point of water is
A 0° C
B 100° C
C 357° C
D -39°C

Answer: 100° C
36 An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will
A flow from iron ball to water.
B not flow from iron ball to water or from water to iron ball.
C flow from water to iron ball.
D increase the temperature of both.

Answer: not flow from iron ball to water or from water to iron ball.
37 In Fahrenheit scale, water freezes at
A 0° F
B 32° F
C 40° F
D 212° F

Answer: 32° F
38 Bodies transmitting heat via radiation
A do not require any medium
B are liquids only
C make heat travels in one direction only.
D solids only

Answer: do not require any medium
39 One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be
A 80°C
B more than 50°C but less than 80°C
C 20°C
D between 30°C and 50°C

Answer: between 30°C and 50°C
40 Unit of heat energy is
A kilogram
B metre
C joule
D degree

Answer: joule

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!
Advertisement
Assam Direct Recruitment Test Series