Question: Gas turbine normally employs a constant _______________ cycle?

• 1. Pressure
• 2. Temperature
• 3. Volume
• 4. None of these

Question: Boiler draught of 10 mm water column is equivalent to_____________________?

• 1. 1 kgf/m2
• 2. 10 kgf/m2
• 3. 10 kgf/mm2
• 4. 1 kgf/mm2

Question: What is the range of tempering temperature (°C) for most of the materials ?

• 1. 75-100
• 2. 200-300
• 3. 350-450
• 4. 500-600

Question: The ‘laughing gas’ is__________________?

• 1. Nitrous oxide
• 2. Nitric oxide
• 3. Nitrogen trioxide
• 4. Nitrogen pentoxide

Question: Regeneration of molecular sieve requires it to be heated to a temperature of about __________________ °C?

• 1. 80-120
• 2. 200-300
• 3. 600-800
• 4. 1000-1100

Question: ____________________ metal is used as a bearing liner material?

• 1. Pewter
• 2. White
• 3. Babbitt
• 4. Gun

Question: Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ?

• 1. °C
• 2. °F
• 3. °K
• 4. °R

Question: The activity of pure hydrogen gas at 1000°C and 5 atm pressure_________________?

• 1. Is always less than 1
• 2. Is always greater than 1
• 3. Can be 5
• 4. Depends on the choice of the standard state

Question: Brazing filler metal used for joining steel plates_________________?

• 1. Melts below the melting points of base metals
• 2. Melts below 300°C
• 3. Is copper phosphorous alloy
• 4. Is copper

Question: If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?

• 1. 23
• 2. 23/2
• 3. 25/2
• 4. 21/3