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45.

46.

47.

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50.

For aclosed non-flow thermodynamic system, which of the following property relation
is valid ?

A) TdS = dH — Vdp B) TdS =dH + Vdp

C) TdS =dQ + pdV D) TdS =— dH - Vdp

If a four stroke cycle diesel engine running at 1000 rpm has a displacement of
20 litres and brake mean effective pressure of 6 bar, what will be its brake power ?

A) 200 kw B) 100 kw
C) 1000 kw D) 2000 kw

In a SI engine, the detonation tendency increases with which of the following ?
i. Increase in compression ratio.

ii. Decrease in air inlet temperature.

iii. Increase in load on the engine.

iv. Increase in engine speed.

A) i, iiand iv B) ii, iii and iv

C) i, iii and iv D) i, ii and iii

An IC engine working between temperature limits of 477°C and 27°C consumes 1 kg
of fuel per hour and produces an output power of 4.8 kW. If the heat value of the fuel
is 43200 kJ/kg, what will be the actual efficiency and theoretical maximum efficiency
of the engine ?

A) 40% and 94.34% B) 60% and 40%

C) 94.34% and 40% D) 40% and 60%

For ideal Otto cycle, which of the following statement is true ?
A) The heat addition takes place at constant pressure
B) The heat addition takes place at constant volume
C) The heat addition takes place at constant temperature
)

D) The heat addition takes place partially at constant pressure and partially at
constant volume

If the solar irradiance is 1 sun, what will be the power output from a solar panel with
2 m? area and conversion efficiency of 20% ?

A) 400 W B) 400 kw

C) 2000 W D) 2000 kw