1. When the diameter of the shaft is doubled, its torque transmitting capacity will be increased by:

(a) 16 times

(b) 2 times

(c) 4 times

(d) 8 times

Answer : (d) 8 times

2. If the Poisson's ratio is 0.25, then the ratio of shear modulus to the elastic modulus is:

(a) 0.25

(b) 0.4

(c) 1.25

(d) 0.5

Answer : (b) 0.4

3. The poisson's ratio of carbon steel is:

(a) 0.41

(b) 0.21

(c) 0.29

(d) 0.75

Answer : (c) 0.29

4. The process of addition of moisture to air at constant dry bulb temperature is:

(a) air conditioning

(b) humidification

(c) sensible heating

(d) dehydration

Answer : (b) humidification

5. Boiling temperature of Freon-22 is:

(a) -33.33°C

(b) -78.5°C

(c) -29.8°C

(d) -40.7°C

Answer : (d) -40.7°C

6. In a psychrometric process, the sensible heat added is 40 kJ/sec and latent heat added is 30 kJ/sec. The sensible heat factor for the process will be:

(a) 0.3

(b) 0.67

(c) 0.6

(d) 0.57

Answer : (d) 0.57

7. The highest temperature in vapour compression cycle occurs at:

(a) receiver

(b) expansion valve

(c) compressor discharge

(d) condenser discharge

Answer : (c) compressor discharge

8. Greenhouse effect refers to increase in:

(a) global temperature

(b) carbon monoxide

(c) atmospheric pressure

(d) greenary

Answer : (a) global temperature

9. At the critical point of stream:

(a) boiling point is 0°C

(b) enthalpy of evaporation is zero

(c) sensible heat is zero

(d) total enthalpy is zero

Answer : (b) enthalpy of evaporation is zero

10. Concentration of solids in boiler drum is controlled by:

(a) reducing dosage of chemical

(b) blowdown

(c) steam venting

(d) deaeration

Answer : (b) blowdown

(a) 16 times

(b) 2 times

(c) 4 times

(d) 8 times

Answer : (d) 8 times

2. If the Poisson's ratio is 0.25, then the ratio of shear modulus to the elastic modulus is:

(a) 0.25

(b) 0.4

(c) 1.25

(d) 0.5

Answer : (b) 0.4

3. The poisson's ratio of carbon steel is:

(a) 0.41

(b) 0.21

(c) 0.29

(d) 0.75

Answer : (c) 0.29

4. The process of addition of moisture to air at constant dry bulb temperature is:

(a) air conditioning

(b) humidification

(c) sensible heating

(d) dehydration

Answer : (b) humidification

5. Boiling temperature of Freon-22 is:

(a) -33.33°C

(b) -78.5°C

(c) -29.8°C

(d) -40.7°C

Answer : (d) -40.7°C

6. In a psychrometric process, the sensible heat added is 40 kJ/sec and latent heat added is 30 kJ/sec. The sensible heat factor for the process will be:

(a) 0.3

(b) 0.67

(c) 0.6

(d) 0.57

Answer : (d) 0.57

7. The highest temperature in vapour compression cycle occurs at:

(a) receiver

(b) expansion valve

(c) compressor discharge

(d) condenser discharge

Answer : (c) compressor discharge

8. Greenhouse effect refers to increase in:

(a) global temperature

(b) carbon monoxide

(c) atmospheric pressure

(d) greenary

Answer : (a) global temperature

9. At the critical point of stream:

(a) boiling point is 0°C

(b) enthalpy of evaporation is zero

(c) sensible heat is zero

(d) total enthalpy is zero

Answer : (b) enthalpy of evaporation is zero

10. Concentration of solids in boiler drum is controlled by:

(a) reducing dosage of chemical

(b) blowdown

(c) steam venting

(d) deaeration

Answer : (b) blowdown

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