This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Energy Conservation”.
1. Law of conservation of energy states that
a) Total energy of the universe is always constant
b) Total energy of the universe is always increasing
c) Total energy of the universe is always decreasing
d) None of the mentioned
View Answer
Explanation: Law of conservation of energy states that total energy of the universe is always constant.
2. A mass having an initial kinetic energy of 40 Jules gets a potential energy of 10 Jules by reaching at a height h. What is the kinetic energy of the mass now?
a) 10 J
b) 20 J
c) 30 J
d) 40 J
View Answer
Explanation: Law of conservation of energy states that total energy of the universe is always constant.
3-8. A block having a mass of 1 kg and velocity 2 m/s2 is at the ground.
3. What is the kinetic energy of the block?
a) 1 J
b) 2 J
c) 3 J
d) 4 J
View Answer
Explanation: K.E. = ½ mv2.
4. If the block gets a height of 5 m, what is the potential energy of the block?
a) 49 J
b) 98 J
c) 87 J
d) 98 J
View Answer
Explanation: P.E = mgh.
5. If the block gets a height of 0.2 m using some of the kinetic energy what is the kinetic energy of the block after reaching the extreme point?
a) 0.01 J
b) 0.02 J
c) 0.03 J
d) 0.04 J
View Answer
Explanation: K.E. + P.E. = Total Energy = Constant.
6. The total energy of the block _________ in every operation.
a) Increases
b) Decreases
c) Remains constant
d) None of the mentioned
View Answer
Explanation: The total energy of the block constant in every operation.
7. If the block uses the whole energy to gain some height, what will be that height?
a) 0.104 m
b) 0.204 m
c) 0.304 m
d) 0.404 m
View Answer
Explanation: mgh = 2 J.
8. If the block is initially at a height of 2 m and with zero velocity. What is the maximum velocity it can gain?
a) 2.26
b) 4.26
c) 6.26
d) 8.26
View Answer
Explanation: 1/2 mv2 = mgh.
9. If the velocity of the block is doubled, the kinetic energy of the block will be
a) Half
b) Double
c) Four times
d) None of the mentioned
View Answer
Explanation: KE = ½ mv2.
10. If the height gained by the block is half of the initial case, the potential energy will also be ________ of the initial potential energy.
a) Half
b) Double
c) Four times
d) None of the mentioned
View Answer
Explanation: PE = mgh.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
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