A. below 10°K
B. above 100°K
C. around 0°C
D. around 100°C
E. above 1000°C
Related Mcqs:
- The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will _________________?
A. increase
B. decrease
C. remain same
D. first increase and then decrease
E. show unpredictable behaviour - The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?
A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. unpredictable - Ferromagnetic alpha iron exists in temperature range of________________?
A. below 723°C
B. 770 – 910°C
C. 910-1440°C
D. 1400-1539°C
E. above 1539°C - Slow plastic defomiation of metals under a constant stress is known as________________?
A. creep
B. fatigue
C. endurance
D. plastic deformation
E. non-plastic deformation - Which one of the following metals would work-harden more quickly than the others__________________?
A. copper
B. brass
C. lead
D. silver
E. aluminium - Petrol is distilled at a temperature in range of__________________?
A. 30 – 65°C
B. 65 – 220°C
C. 220-350°C
D. 350-450°C
E. 450-550°C - In petrol engine using a fixed octane rating fuel and fixed compression ratio, super charging will_________________?
A. increase the knocking tendency
B. decrease the knocking tendency
C. not affect the knocking tendency
D. increase or decrease knocking tendency depending on strength and time of spark
E. unpredictable - With increase in load, radiant super heater has____________________?
A. drooping characteristic
B. lihear characterisstic
C. rising characteristic
D. flat characteristic
E. none of the above - The safety valve on boiler drum compared to safety valve on super heater is set at ________________?
A. same value
B. higher value
C. lower value
D. lower/higher depending on steam flow
E. unpredicatble - Austenite rs a combination of_________________?
A. ferrite and cementite
B. cementite and gamma iron
C. ferrite and austenite
D. ferrite and iron graphite
E. pearlite and ferrite
