Mock Test: SSC JE (ME)- 4 - Mechanical Engineering MCQ

Increase in temperature, pressure and energy

Decrease in temperature, pressure and energy

Increase in temperature and pressure but no change in energy

Increase in temperature and pressure but decrease in energy

Molecular weight and structure

Pressure

Volume

Temperature 

δQ = dU + δW

δQ = dU + p dV

TDS = dU + δW

TdS = dU + pdV

An ideal gas at any state

A real gas at any state

Any gas at its critical state

Any gas below its critical state

dG = 0

dp = 0

dH = 0

dU = 0

0

1

2

3

1.013 bar

760 mm of Hg

1013 × 10² N/m²

all of these

pv = constant, if T is kept constant

v/T = constant , if P is kept constant

p/T = constant, if v is kept constant

T/p = constant, if v is kept constant.

pressure

volume

temperature

all of these

pv = C

pv = mRT

pvⁿ = C

enthalpy

internal energy

entropy

external energy

good miscibility with lubricating oil

Good evaporating temperature

low evaporating temperature

high compressor discharge temperature 

Ozone

Carbon dioxide

Nitrogen

Carbon monoxide

capillary tube

thermostatic expansion valve

automatic expansion value

float valve

reversed Carnot cycle

reversed Otto cycle

reversed Joule cycle

revered Rankine cycle

isentropic compression process

constant pressure cooling process

isentropic expansion process

constant pressure expansion process

Changing the ignition timing

Regulating the amount of air-fuel inducted

Regulating the amount of air fuel mixture

Regulating the amount fuel

Two adiabatic and two constant volume processes

Two constant volume and two isothermal processes

One constant pressure, one constant volume and two adiabatic processes

One constant pressure, one constant volume and tow isothermal processes

increasing the pressure of intake air

increasing the temperature of intake air

increasing the density of intake air

decreasing the density of intake air

The cetane number of alcohol fuels is very low which prevents their ignition by compression

The cetane number of alcohol fuels is very high which prevents their ignition bycompression

None of these

The cetane number of alcohol fuels is very low which prevent their ignition by combustion 

Compression ratio

Wall temperature

Supercharging

Engine speed

One valve

two valve

three valves

four valves

white

bluish

black

violent

preheating the combustion air

Preheating the feed water

Preheating the input fuel

Raising the temperature of steam

Saturated cycle

Superheater cycle

Reheat cycle

Regenerative cycle

Reversibly at constant volume

Reversibly at constant temperature

Reversibly at constant pressure and temperature

Reversibly at constant pressure

Maximum temperature of steam in Kelvin

Heat transfer rate in kJ/hr

Heat transfer area in meter2

Steam output in kg/hr

dearation process

Scavenging process

Exhaust process

Condensation process

Only the thermal efficiency

Only the specific power output

Both thermal efficiency and specific power 

Neither thermal efficiency nor specific power output