A. Polystyrene
B. Melamine
C. Polystyrene
D. Polyurethane
Related Mcqs:
- While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?
A. Low impact strength
B. High flexibility
C. Better finish and surface appearance
D. High plastic deformation - Pick out the correct combination about the role of various additives used in polymers ?
A. Plasticiser: increases the polymer strength
B. Heat stabiliser: increases the maximum service temperature
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers - Basic open hearth furnace (BOF) is not used for producing ______________ steel?
A. Killed
B. Rimming
C. High alloy
D. None of these - The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?
A. 100
B. 200
C. 1000
D. 2000 - On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the ______________ of the input signal?
A. Frequency
B. Amplitude
C. Damping
D. None of these - Thermodynamic cycle involved in the working of a thermal power plant is the ______________ cycle ?
A. Joule
B. Carnot
C. Rankine
D. Brayton - A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
A. 6
B. 18
C. 38
D. 52 - Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be ______________ mm?
A. 10
B. 20
C. 30
D. 40 - In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?
A. 20
B. 60
C. 120
D. ∞ - Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand?
A. Parting
B. Synthetic
C. Loam
D. Dry
