Chemical Process Calculation Questions and Answers – Energy Conservation

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

Answer: a
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

Answer: b
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

Answer: b
Explanation: K.E. = ½ mv2.
advertisement
advertisement

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

Answer: a
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

Answer: d
Explanation: K.E. + P.E. = Total Energy = Constant.
Note: Join free Sanfoundry classes at Telegram or Youtube

6. The total energy of the block _________ in every operation.
a) Increases
b) Decreases
c) Remains constant
d) None of the mentioned
View Answer

Answer: c
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

Answer: b
Explanation: mgh = 2 J.
advertisement

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

Answer: c
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

Answer: c
Explanation: KE = ½ mv2.
advertisement

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

Answer: a
Explanation: PE = mgh.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.