Engineering/Chemical Engineering Mcq Question Set 14 Sample Test,Sample questions

Question:
 A stone is thrown up with a velocity and comes down, what is the change in kinetic energy of stone?

1.Positive

2.Negative

3.Zero

4.cannot say


Question:
 For an open unsteady state system, 15 J of heat was taken off and 10 J of work was done by the system, what is the value of a change in enthalpy?

1. – 5 J

2.5 J

3. 25 J

4.– 25 J


Question:
 If Cp of steam is 105 J/oC, what is the enthalpy change of steam from 106oC to 118oC?

1.420 J

2.640 J

3.890 J

4.1260 J


Question:
 What is the change in internal energy for a process which has final and initial states are exactly similar?

1.Positive

2.Negative

3.Zero

4.cannot say


Question:
 What is the kinetic energy of an object of mass 2 Kg and velocity 5 m/s?

1.20 J

2. 25 J

3. 35 J

4. 50 J


Question:
10 J of heat and 5 J of work are supplied to the system, what is the change in internal energy?

1.5 J

2.10 J

3.15 J

4.20 J


Question:
10 J of heat is supplied and 3 J is taken out, if the change in internal energy of the system is 5 J, what is the work done on the system?

1.2 J

2.– 2 J

3. 5 J

4.– 5 J


Question:
15 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 10 J?

1.10 J

2.15 J

3. 25 J

4.40 J


Question:
15 J of heat is supplied to a system and system does 5 J of work, what is the change in internal energy?

1.5 J

2.10 J

3.15 J

4.20 J


Question:
150 J is the latent heat for vaporization of water, what is the heat of transition from 50oC water to 100oC steam if heat of transition from 50oC water to 100oC water is 12 J?

1.12 J

2. 152 J

3.162 J

4.200 J


Question:
5 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 12 J?

1. 5 J

2.12 J

3.15 J

4.17 J


Question:
5 J of heat is taken out of the system and 20 J of work is done on the system, what is the change in internal energy of the system?

1. 5 J

2. 10 J

3.15 J

4.20 J


Question:
5 J of work is done by the system, if the change in internal energy of the system is 10 J, what is the heat supplied to the system?

1.– 5 J

2.5 J

3.– 15 J

4.15 J


Question:
A ball is thrown up and someone catches it on the cliff, what is the change in potential energy?

1.Positive

2.Negative

3. Zero

4.cannot say


Question:
A fluid in supplied to a cliff 10 m high, what is the change in specific potential energy of fluid?

1.10 J/Kg

2.100 J/Kg

3.200 J/Kg

4. 500 J/Kg


Question:
A fluid is supplied to a cliff 20 m high and comes down by 5 m, what is the change in specific potential energy of fluid?

1.100 J/Kg

2.150 J/Kg

3.200 J/Kg

4.250 J/Kg


Question:
A stone has initial potential and kinetic energy as 10 J and 5 J respectively if the final potential energy of the stone is 15 J what is its final kinetic energy?

1. 0

2.5 J

3. 10 J

4.15 J


Question:
A stone has initial potential and kinetic energy as 5 J and 20 J respectively if the final kinetic energy of the stone is 15 J what is its final potential energy?

1. 0

2.10 J

3.15 J

4.25 J


Question:
A stone has initial potential, kinetic and internal energy 4 J, 15 J and 20 J respectively, if the final kinetic energy and potential energy of the stone is 5 J and 10 J respectively, what is the final internal energy?

1.15 J

2.20 J

3.24 J

4. 32 J


Question:
A stone has initial potential, kinetic and internal energy 7 J, 10 J and 2x J respectively, if the final kinetic energy, potential energy and internal energy are 5 J, 21 J and x respectively, what is the final internal energy?

1.2 J

2.4 J

3.5 J

4.9 J


Question:
A stone is released from a cliff and comes down, what is the change in kinetic energy of stone?

1.Positive

2.Negative

3.Zero

4.cannot say


Question:
Cp of ice is 10 J/oC and that of water is 15 J/oC, what is the enthalpy change of water from – 15oC to 0oC at standard conditions, if the later heat of fusion of water is 110 J?

1.150 J

2.315 J

3.485 J

4.560 J


Question:
Cp of ice is 25 J/oC and that of water is 30 J/oC, what is the enthalpy change of water from – 10oC to 35oC at standard conditions, if the later heat of fusion of water is 110 J?

1.250 J

2.595 J

3.960 J

4.1410 J


Question:
Cp of water is 10 J/oC and that of steam is 15 J/oC, what is the enthalpy change of water from 75oC to 110oC at standard conditions, if the later heat of vaporization of water is 245 J?

1.395 J

2.645 J

3. 840 J

4.999 J


Question:
For an open unsteady state system, 10 J of heat was supplied and 10 J of work was done by the system, what is the value of a change in enthalpy?

1. 0

2.10 J

3.20 J

4. – 20 J


Question:
For an open unsteady state system, 15 J of heat was supplied and -5 J of work was done on the system, what is the value of a change in enthalpy?

1. 10 J

2.– 15 J

3.20 J

4.– 25 J


Question:
For an open unsteady state system, 5 J of heat was supplied and 10 J of work was done by the system, what is the value of a change in enthalpy?

1. – 5 J

2.5 J

3.10 J

4.15 J


Question:
For an open unsteady state system, 5 J of heat was supplied and 10 J of work was done on the system, what is the value of a change in enthalpy?

1. 5 J

2.10 J

3.15 J

4. 20 J


Question:
Heat of fusion of benzene is 10 J at 0oC, if Cp of solid benzene is 10 J/oC, and that of liquid benzene is 5 J/oC what is the enthalpy change of benzene from – 10oC to 10oC?

1.160 J

2.200 J

3.240 J

4.300 J


Question:
If Cp of liquid benzene is 15 J/oC, what is the enthalpy change of water from 5oC to 10oC?

1.15 J

2.50 J

3. 75 J

4.90 J


Question:
If Cp of liquid water is 10 J/oC, what is the enthalpy change of water at standard conditions from – 10oC to 0oC?

1.10 J

2.50 J

3.100 J

4. Cannot be determined


Question:
If Cp of solid benzene is 10 J/oC, what is the enthalpy change of water from 5oC to 75oC?

1. 5 J

2.10 J

3.75 J

4.700 J


Question:
If Cp of water is (23 + T) J/oC, what is the enthalpy change of water from 3oC to 5oC?

1.54 J

2.96 J

3.140 J

4.196 J


Question:
If Cp of water is 45T J/oC, what is the enthalpy change of water from 6oC to 8oC?

1. 7 J

2.14 J

3. 28 J

4.56 J


Question:
Ratio of change in internal energy of a substance from 15oC to T and from T to 10oC is – 2, what is T?

1.5oC

2.15oC

3.20oC

4. 30oC


Question:
Ratio of change in internal energy of a substance from 4oC to T and from T to 10oC is 2, what is T?

1.5oC

2.6oC

3.7oC

4.8oC


Question:
Total energy of the universe is always ______

1. Increasing

2.Decreasing

3.Constant

4.cannot say


Question:
Vaporization starts at which point?

1.Dew point

2.Bubble point

3.Triple point

4.None of the mentioned


Question:
What is the change in internal energy of 1 mole of air ((Cv = 2.1 X 104 J/moleoC), if its temperature changes from 10oC to 5oC?

1. 84 kJ

2.105 kJ

3.– 84 kJ

4.– 105 kJ


Question:
What is the change in internal energy of 2 mole of air (Cv = 2.1 X 104 J/moleoC), if its temperature changes from 10oC to 20oC?

1.420 kJ

2.540 kJ

3.840 kJ

4.1050 kJ


Question:
What is the change in potential energy of a stone of mass 1 Kg thrown up with a velocity 10 m/s and comes down?

1.0

2.10 J

3. 100 J

4.500 J


Question:
What is the change potential energy of a stone of mass 5 Kg that falls from a cliff 10 m high?

1.5 J

2.50 J

3.500 J

4.5000 J


Question:
What is the kinetic energy of an object of mass 10 Kg moving with velocity 2 m/s?

1.10 J

2.20 J

3.40 J

4.50 J


Question:
What is the latent heat for melting?

1.Heat of vaporization

2.Heat of fusion

3. Heat of Solidification

4.None of the mentioned


Question:
What is the point of saturation of a condensable vapor?

1.Bubble point

2.Boiling point

3.Triple point

4.Dew point


Question:
What is the specific kinetic energy of a fluid flowing at rate 0.1 m3/s and 1 m diameter pipe?

1.0.008 J/Kg

2. 0.016 J/Kg

3.0.028 J/Kg

4. 0.064 J/Kg


Question:
What is the vaporization temperature of water at standard conditions?

1.100oF

2. 212oF

3.345oF

4.432oF


Question:
Which of the following can definitely cause vaporization?

1.Heating a liquid

2.Heating a liquid at constant pressure

3. Cooling a liquid

4.Cooling a liquid at constant volume


Question:
Which of the following is heat required in phase transitions?

1.Latent Heat

2.Sensible Heat

3.Depends on type of phase transition

4.None of the mentioned


Question:
Which of the following represents vaporization?

1.Change of vapor to liquid

2.Change of vapor to solid

3.Change of solid to vapor

4.Change of liquid to vapor


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