Question: Pick out the wrong statement ?

• 1. Polystyrene is a thermoplastic polymer
• 2. Protein is a natural polymer
• 3. Neoprene is a natural rubber
• 4. Polythene is a copolymer, while SBR is a homopolymer

Question: Pick out the wrong statement?

• 1. Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre
• 2. Crimp is a measure of the difference between the length of the straightened and unstraightened fibre
• 3. Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning
• 4. Nylon fibres have greater water absorption capacity than polyester fibres

Question: According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?

• 1. 0°
• 2. 45°
• 3. 90°
• 4. 180°

Question: Mcleod gauge measures the _____________ pressure?

• 1. Positive
• 2. Sub-atmospheric
• 3. Very high
• 4. Atmospheric

Question: Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________?

• 1. Thermal conductivity through the paper
• 2. Electrical resistance through the paper
• 3. Magnetic susceptibility
• 4. None of these

Question: Liquid column manometers are used for measuring the pressure ______________ kgf/cm2?

• 1. > 2 (gage)
• 2. < 3 (gage)
• 3. < 10 (gage)
• 4. < atmospheric

Question: Which is the strongest paramagnetic gas ?

• 1. CO2
• 2. O2
• 3. NO
• 4. NO2

Question: Maximum differential pressure in liquid manometer is ______________ psi?

• 1. 20
• 2. 30
• 3. 40
• 4. 50

Question: Which of the following instruments is not used for measuring sub-zero (<0°) temperatures ?

• 1. Platinum resistance thermometer
• 2. Mercury in glass thermometer
• 3. Vapor pressure thermometer
• 4. Radiation pyrometer

Question: Which of the following cannot measure a temperature of 1600°C ?

• 1. Platinum resistance thermometer
• 2. Thermocouple
• 3. Photo-electric pyrometer
• 4. Radiation pyrometer