ODBC, OLE DB, ADO, AND ASP QUIZ

The wet bulb temperature during sensible heating of air

Decreases

Increases

Remains constant

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

25°C DBT and 40% RH

22°C DBT and 60% RH

25°C DBT and 100% RH

20°C DBT and 80% RH

TRUE ANSWER : ?
YOUR ANSWER : ?

The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Same

Higher

Lower

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The operating pressure for refrigerating units using R-12 as a refrigerant is

8 bar

15 bar

2 bar

30 bar

TRUE ANSWER : ?
YOUR ANSWER : ?

While designing the refrigeration system of an aircraft, the prime consideration is that the

Mass of refrigerant circulated in the system is low

System has high C.O.P.

Mass of the refrigeration equipment is low

Power per TR is low

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat rejection factor (HRF) is given by

1 + C.O.P

1 - (1/C.O.P)

1 + (1/C.O.P)

1 - C.O.P.

TRUE ANSWER : ?
YOUR ANSWER : ?

In a domestic vapour compression refrigerator, the refrigerant commonly used is

All of these

CO?

Ammonia

R-12

TRUE ANSWER : ?
YOUR ANSWER : ?

An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

e₁ + e₂

e₁e₂

1/e₁ + 1/e₂

(e₁ + e₂)/ e₁ + e₂ - e₁e₂

TRUE ANSWER : ?
YOUR ANSWER : ?

The leaks in a refrigeration system using Freon are detected by

Smelling

Halide torch which on detection produces greenish flame lighting

Using reagents

Sulphur sticks which on detection gives white smoke

TRUE ANSWER : ?
YOUR ANSWER : ?

The dehumidification process, on the psychrometric chart, is shown by

Inclined line

Horizontal line

Vertical line

Curved line

TRUE ANSWER : ?
YOUR ANSWER : ?