- (A) increases
- (B) decreases
- (C) remains constant
- (D) may increase or decrease depending on temperature
- (E) none of the above
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- (A) I.C. engine
- (B) air preheaters
- (C) heating of building in winter
- (D) all of the above
- (E) none of the above
- (A) blast furnace
- (B) heating of building
- (C) cooling of parts in furnace
- (D) heat received by a person from fireplace
- (E) all of the above
- (A) composition
- (B) density
- (C) porosity
- (D) structure
- (E) all of the above
- (A) it is impossible to transfer heat from low temperature source to t high temperature source
- (B) heat transfer by radiation requires no medium
- (C) all bodies above absolute zero emit radiation
- (D) heat transfer in most of the cases takes place by combination of conduction, convection and radiation
- (E) rate of heat transfer depends on thermal conductivity and temperature difference
- (A) proportional of thermal conductivity
- (B) inversely proportional to k
- (C) proportional to (k)
- (D) inversely proportional to k2
- (E) none of the above
- (A) I
- (B) 0.5
- (C) 2
- (D) 0.25
- (E) 4.0
- (A) electric heater
- (B) steam condenser
- (C) melting of ice
- (D) refrigerator condenser coils
- (E) boiler
- (A) quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C
- (B) quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C
- (C) heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
- (D) all of the above
- (E) none of the above
- (A) steam
- (B) solid ice
- (C) melting ice
- (D) water
- (E) boiling water
