- Ozone
- Oxygen
- Nitrogen
- Carbon dioxide
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Air pressure is usually highest when the air is?
Answer: Option 4 Air pressure is usually highest when the air is cool and moist.
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When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be?
Answer: Option 1 When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but...
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When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is?
Answer: Option 3 Let'
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Where cold surface air replaces warm air, the boundary separating the different bodies of air is:?
Answer: Option 3 An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses....
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The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)?
Answer: Option 3 The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by p₂ = p₁ × p₂ where p₁ = Intake pressure of...
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If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder)?
Answer: Option 3 If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the...
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The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature of air entering the heating coil, td₂ = Dry bulb temperature of air leaving the heating coil, and td₃ = Dry bulb temperature of heating coil)?
Answer: Option 2 The bypass factor (B. P. F.) in case of sensible heating of air is (td₃ - td₂)/(td₃ - td₁) Where, td₁ = Dry bulb temperature of air entering the...
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Statement : The air and rail services have been severely disrupted due to thick fog in the northern part of the country. Courses of Action : I. The rail and air services should be temporarily suspended in the region. II. People should be advised to make their travel plan keeping in mind the probable disruption resulting in delay or cancellation of services. III. The government should immediately install modern machines which will enable it to guide the rail and air services even if the thick fog develops.?
Answer: Option 4 Keeping in mind the safety and convenience of passengers, both I and II follow. III clearly suggests a remedy to the problem and hence it also follows.
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Brass gets discoloured in air because of the presence of which of the following gases in air?
Answer: Option 2 Brass gets discolored in air because of the presence of Hydrogen sulphide.
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Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statement : The State Government has abolished the scheme of providing concessional air ticket to students. Assumptions : I. Students will not travel by air in future. II. The students who resort to travel by air can bear the expenses of air ticket.?
Answer: Option 2 The scheme has been abolished not to discourage the students from travelling by air but keeping in mind that the abolition of scheme won't stop them from...
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