SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.76 The value of atmospheric pressure in bar is _______________.

1. 2.01324
2. 0.9874
3. 1.01325
4. 1.5643

Correct Option: 3

Q.77 Flow process is used for which of the following systems?

1. Closed system
2. Isolated system
3. Both open and closed systems
4. Open system

Correct Option: 4

Q.78 Pressure head of a fluid represents:

1. energy per unit length
2. energy per unit weight
3. energy per unit volume
4. energy per unit mass

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.79 The net effect of superheating after compression in vapour compression refrigeration cycle is to have:

1. decrease in refrigeration effect
2. low C.O.P
3. decrease in refrigeration capacity
4. high C.O. P

Correct Option: 2

Q.80 The flow through a capillary tube is an example of ____________ flow.

1. turbulent
2. compressible
3. laminar
4. transition

Correct Option: 3

Q.81 The point at which all the three phases – solid, liquid, and vapour co-exist in equilibrium in a p-T diagram is known as ________.

1. triple point
2. melting point
3. critical point
4. boiling point

Correct Option: 1

Q.82 Which of the following air-cooled condensers are used only in small capacity applications such as domestic refrigerators and room air conditioners?

1. Remote air-cooled condensers
2. Natural convection air-cooled condensers
3. Shell and coil condensers
4. Base mounted air-cooled condensers

Correct Option: 2

Q.83 A centrifugal pump is running at the speed of 1000 rpm against a head of 40 m. If its speed is changed to 3000 rpm, then it will work against a head of:

1. 120 m
2. 40 m
3. 360 m
4. 80 m

Correct Option: 3

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.84 Natural draft cooling towers are also known as ______.

1. artificial cooling towers
2. mechanical draft cooling towers
3. atmospheric cooling towers
4. automatic spray cooling towers

Correct Option: 3

Q.85 An engine is working with temperature limits of 29°C and 229°C. It receives 1000 kW and rejects 429 kW of heat. Possible cycle executed by the engine is

1. Carnot cycle
2. Irreversible cycle
3. Impossible cycle
4. Reversible cycle

Correct Option: 3

Q.86 Which of the following is the correct statement relating to the centre of pressure on an immersed surface?

1. It is the point where the normal pressure acts.
2. It is the point where the resultant pressure acts.
3. It is the point where the weight of body the acts.
4. It is the point where the weight of the body and resultant pressure acts.

Correct Option: 2

Q.87 The Energy Gradient line will______.

1. lie below the Hydraulic Gradient line
2. coincide with pipe axis
3. lie above the Hydraulic Gradient line
4. coincide with Hydraulic Gradient line

Correct Option: 3

Q.88 In a lubrication method, the oil is kept in the crank case sump and it is splashed by using the end of a connecting rod to various components of the engine. This method is called _____.

1. sump lubrication
2. pump lubrication
3. pressure lubrication
4. splash lubrication

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.90 The pressure responsive element in the Bourdon tube pressure gauge is made of _________.

1. aluminium
2. bronze
3. cast iron
4. Inconel

Correct Option: 2

Q.91 The expansion process in a vapour compression refrigeration cycle is a/an ___________.

1. isenthalpic process
2. constant volume process
3. reversible isothermal process
4. isentropic process

Correct Option: 1

Q.92 The ratio of the energy received by the steam to the energy supplied by the fuel to produce steam in a steam boiler is known as __________.

1. actual evaporation
2. boiler efficiency
3. boiler horsepower
4. equivalent evaporation

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.93 Which turbine is suitable where a large discharge at low head is available?

1. Kaplan turbine
2. Francis turbine
3. Pelton turbine
4. Turgo turbine

Correct Option: 1

Q.95 Which thermodynamic property of steam does NOT change in throttling calorimeter?

1. Entropy
2. Enthalpy
3. Pressure
4. Temperature

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8

Q.96 The correct relation between the modulus of elasticity (E) and modulus of rigidity (G) is:Given, µ = Poisson’s ratio.

1. E = 4G(1 + µ)
2. G = 4E(1 + µ)
3. G = 2E(1 + µ)
4. E = 2G(1 + µ)

Correct Option: 4

Q.97 What will be the absolute pressure (approximately) at a point 3 m below the free surface of a liquid having a density of 1530 kg/m3, if the atmospheric pressure is equivalent to 750 mm of mercury? (The specific gravity of mercury is 13.6 and density of water is 1000 kg/m3, g = 9.81 m/sec2)

1. 1,00,250N/m2
2. 78,560N/m2
3. 1,45,090 N/m2
4. 95,648 N/m2

Correct Option: 3

Q.98 The value of enthalpy of vaporisation approaches to zero on the saturation curve of water on a temperature entropy diagram:

1. below critical point
2. above critical point
3. never approaches to zero
4. at critical point

Correct Option: 4

Q.99 Francis turbine is as example of:

1. impulse turbine
2. axial flow turbine
3. radial flow turbine
4. mixed flow turbine

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Mechanical Part 8