Mechanical Engineering Thermodynamics - Set 01 - ObjectiveBooks

Mechanical Engineering Thermodynamics - Set 01

Practice Test: Question Set - 01

1. When a gas is heated, change takes place in
    (A) Temperature
    (B) Pressure
    (C) Volume
    (D) All of these

2. One molecule of oxygen consists of __________ atoms of oxygen.
    (A) 2
    (B) 4
    (C) 8
    (D) 16

3. Which of the following variables controls the physical properties of a perfect gas?
    (A) Pressure
    (B) Temperature
    (C) Volume
    (D) All of the above

4. The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
    (A) Cracking
    (B) Fractional distillation
    (C) Full distillation
    (D) Carbonisation

5. Work done in a free expansion process is
    (A) Zero
    (B) Maximum
    (C) Minimum
    (D) Positive

6. Which of the following laws is applicable for the behaviour of a perfect gas?
    (A) Boyle's law
    (B) Charles ‘law
    (C) Gay Lussac’s law
    (D) All of the above

7. The unit of temperature in S.I. units is
    (A) Centigrade
    (B) Celsius
    (C) Fahrenheit
    (D) Kelvin

8. A cycle consisting of _________ and two isothermal processes is known as Stirling cycle.
    (A) Two isentropic
    (B) One constant pressure, one constant volume
    (C) Two constant volumes
    (D) Two constant pressures

9. A tri-atomic molecule consists of __________ atoms.
    (A) Three
    (B) One
    (C) Two
    (D) Four

10. The unit of mass in S.I. units is
    (A) Kilogram
    (B) Gram
    (C) Tonne
    (D) Quintal

11. The unit of time in S.I. units is
    (A) Second
    (B) Minute
    (C) Hour
    (D) Day

12. The unit of length in S.I. units is
    (A) Meter
    (B) Centimeter
    (C) Kilometer
    (D) Millimeter

13. Mond gas is obtained by
    (A) Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
    (B) Carbonisation of bituminous coal
    (C) Passing steam over incandescent coke
    (D) Passing air and a large amount of steam over waste coal at about 650°C

14. The main cause for the irreversibility is
    (A) Unrestricted expansion
    (B) Mechanical and fluid friction
    (C) Heat transfer with a finite temperature difference
    (D) All of the above

15. The unit of energy in S.I. units is
    (A) watt
    (B) Joule
    (C) joule/s
    (D) joule/m

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