SSC JE Mock Test 9 - Online MCQ Exam

In a manual shunt motor starter

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Your Answer:

Over load relay is connected in series and no volt relay in parallel with the load
Over load relay is connected in parallel and no volt relay in series with the load
Over load relay and no volt relay are both connected in series with the load
Over load relay and no volt relay are both connected in parallel with the load

An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is

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Your Answer:

6 V 6 V
3 V 3 V
2 V 2 V
0 V 0 V

In a counterfort retaining wall, the main reinforcement is provided on thei) bottom face in front counterfortii) inclined face in front counterfortiii) bottom face in back counterfortiv) inclined face in back counterEortThe correct answer is

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Your Answer:

(i) and (ii), (i) and (ii),
(ii) and (iii) (ii) and (iii)
(i) and (iv) (i) and (iv)
(iii) and (iv) (iii) and (iv)

The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

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180° to each other 180° to each other
90° to each other 90° to each other
0° to each other 0° to each other
None of these None of these

A 140 Ω resistor is in parallel with an inductor having 60 Ω inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is

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Your Answer:

5.51 Ω 5.51 Ω
55.15 Ω 55.15 Ω
90 Ω 90 Ω
200 Ω 200 Ω

The length of air gap to be provided in ______ is primarily determined by power factor consideration.

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D.C. series motor D.C. series motor
D.C. shunt motor D.C. shunt motor
Induction motor Induction motor
Synchronous motor Synchronous motor

Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?

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Bmax Bmax
Bmax1-6 Bmax1-6
Bmax1-83 Bmax1-83
B max B max

Depth of hardness of steel is increased by addition of_________________?

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nickel nickel
chromium chromium
tungsten tungsten
vanadium vanadium
ell of the above ell of the above

Latent heat of dry steam at atmospneric pressure is equal to____________________?

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Your Answer:

539 kcal/kg 539 kcal/kg
539 BTU/lb 539 BTU/lb
427 kcal/kg 427 kcal/kg
100 kcal/kg 100 kcal/kg
471 kcal/kg 471 kcal/kg

A nichrome wire used as a heater coil has the resistance of 2 Ω/m. For a heater of 1 kW at 200 V, the length of wire required will be

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Your Answer:

80 m 80 m
60 m 60 m
40 m 40 m
20 m 20 m

If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test

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Only (i) Only (i)
Both (i) and (ii) Both (i) and (ii)
Both (i) and (iii) Both (i) and (iii)
All (i), (ii) and (iii) All (i), (ii) and (iii)

For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

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Your Answer:

directly proportional to Reynolds number and independent of pipe wall roughness
directly proportional to pipe wall roughness and independent of Reynolds number
inversely proportional to Reynolds number and indpendent of pipe wall roughness
inversely proportional to Reynolds number and directly proportional to pipe wall roughness

Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is _________ as that of shaft A.

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One-half One-half
Double Double
Four times Four times
Eight times Eight times

In U.S. structural and architectural drafting, all dimensions of this length are usually expressed in feet and inches:

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One inch or over One inch or over
One foot or over One foot or over
One yard or over One yard or over
One rod or over One rod or over

The drop man holes are generally provided in sewers for____________________?

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Industrial areas Industrial areas
Large town ships Large town ships
Hilly town ships Hilly town ships
Cities in plains Cities in plains

Heat flows from one body to other when they have

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Different heat contents Different heat contents
Different specific heat Different specific heat
Different atomic structure Different atomic structure
Different temperatures Different temperatures

A differentiator is usually not a part of a control system because it

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reduces damping reduces damping
reduces the gain margin reduces the gain margin
increases input noise increases input noise
increases error increases error

When a given transformer is run at its rated voltage but reduced frequency, its

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flux density remains unaffected flux density remains unaffected
iron losses are reduced iron losses are reduced
core flux density is reduced core flux density is reduced
core flux density is increased core flux density is increased

Benchmark is established by________________?

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hypsometry hypsometry
barometric levelling barometric levelling
spirit levelling spirit levelling
trigonometrical levelling trigonometrical levelling

The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?

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same same
more more
less less
more or less depending on other factors more or less depending on other factors

_______________is universally used for windings of electrical machines because it is easily workable without any possibility of fracture?

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Your Answer:

Silver Silver
Steel Steel
Aluminium Aluminium
Copper Copper

The armature torque of the D.C. shunt motor is proportional to

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Your Answer:

field flux only field flux only
armature current only armature current only
both (A) and (B) both (A) and (B)
none of the above none of the above

Cast iron . . . . . . . .

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Is obtained by purifying pig iron Is obtained by purifying pig iron
Is manufactured in required shapes Is manufactured in required shapes
May contain 2 to 5 percent of carbon with other impurities
All the above All the above

The operation of a D.C. machine with large air gap lengths is comparatively_____________?

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quiet quiet
noisy noisy
either of the above either of the above
none of the above none of the above

The pulsating d.c. applied to power amplifier causes________________?

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Your Answer:

Burning of transistor Burning of transistor
Hum in the circuit Hum in the circuit
Excessive forward voltage Excessive forward voltage
None of the above None of the above

For a non-concurrent force system to be in equilibrium

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Only the closure of force polygon is sufficient
Only the closure of funicular polygon is sufficient
Both force polygon and funicular polygon must close
None of the above None of the above

Annealing of white cast iron results in production of_________________?

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Your Answer:

malleable iron malleable iron
nodular iron nodular iron
spheroidal iron spheroidal iron
grey iron grey iron
none of the above none of the above

If the distance between the two point charges become half then force between them becomes______________?

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double double
half half
four times four times
remains same remains same

The concrete work for the following part of the building of specified thickness is measured in square metres_______________?

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Your Answer:

Root slabs Root slabs
Floors Floors
Wall panels Wall panels
All the above All the above

In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?

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Your Answer:

Short Short
Open Open
Partially open Partially open
None of the above None of the above

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

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Your Answer:

Which lies between the dry bulb and wet bulb temperatures of the incoming stream
Which lies between the wet bulb and dew point temperatures of the incoming stream
Which is lower than the dew point temperature of the incoming stream
Of adiabatic saturation of incoming stream

Ball valves are commonly used to_________?

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throttle flow throttle flow
check flow check flow
change flow direction change flow direction
start/stop flow start/stop flow

The time of concentration is defined as

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Your Answer:

The time taken by rainfall water to run from most distant point of water shed to the inlet of sewer
The time required for flow of water in sewer to the point under consideration
Sum of (A) and (B) Sum of (A) and (B)
Difference of (A) and (B) Difference of (A) and (B)

Pick up wrong statement about friction force for dry surfaces. Friction force is

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Your Answer:

Proportional to normal load between the surfaces
Dependent on the materials of contact surface
Proportional to velocity of sliding Proportional to velocity of sliding
Independent of the area of contact surfaces

In a beam the local bond stress Sb, is equal to_______________?

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Your Answer:

Shear force/(Leaver arm × Total perimeter of reinforcement)
Total perimeter of reinforcement/(Leaver arm × Shear force)
Leaver arm/(Shear force × Total perimeter of reinforcement)
Leaver arm/(Bending moment × Total perimeter of reinforcement)

_______ has zero temperature co-efficient of resistance.

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Your Answer:

Aluminium Aluminium
Carbon Carbon
Porcelain Porcelain
Manganin Manganin

In a R-L-C circuit

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Your Answer:

Power is consumed in resistance and is equal to IR
Exchange of power takes place between inductor and supply line
Exchange of power takes place between capacitor and supply line
All above are correct All above are correct

The heat loss in a boiler takes place in the form of________________?

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Your Answer:

heat carried away by flue gases heat carried away by flue gases
heat carried away by ash heat carried away by ash
moisture present in fuel and steam formed by combustion of hydrogen in fuel
radiation radiation
all of the above all of the above

For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one of the following would be most suitable?

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Your Answer:

Providing buttresses at certain intervals
Providing a deeper foundation Providing a deeper foundation
Using a richer mortar Using a richer mortar
Using stronger bricks Using stronger bricks

Air binding phenomena in rapid sand filters occur due to_________________?

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Your Answer:

excessive negative head excessive negative head
mud ball formation mud ball formation
higher turbidity in the effluent higher turbidity in the effluent
low temperature low temperature

A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?

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Your Answer:

30° to 150°. 30° to 150°.
30° to 180°. 30° to 180°.
60° to 120°. 60° to 120°.
60° to 180°. 60° to 180°.

The driving and driven shafts connected by a Hooke's joint will have equal speeds, if

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Your Answer:

cosθ = sinα cosθ = sinα
sinθ = ± tanα sinθ = ± tanα
tanθ = ± cosα tanθ = ± cosα
cotθ = cosα cotθ = cosα

Flow of water in a pipe about 3 meters in diameter can be measured by_________________?

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Your Answer:

orifice plate orifice plate
venturi venturi
rotameter rotameter
pitot tube pitot tube
nozzle nozzle

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

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Your Answer:

Hydrogen sulphide Hydrogen sulphide
Carbon dioxide Carbon dioxide
Methane Methane
Oxygen Oxygen

The bond in which headers and stretchers are laid in alternate courses and every stretcher course is started with a three fourth brick bat, is known as

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Your Answer:

English cross bond English cross bond
Dutch bond Dutch bond
Monk bond Monk bond
Rat-trap bond Rat-trap bond

The photo-electric effect occurs only when the incident light has more than a certain critical

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Your Answer:

Intensity Intensity
Speed Speed
Frequency Frequency
Wave length Wave length

Compressed air coming out from a punctured football___________________?

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Your Answer:

becomes hotter becomes hotter
becomes cooler1 becomes cooler1
remains at the same temperature remains at the same temperature
may become hotter or cooler depend-ing upon the humidity of the surround¬ing air

The pressure at the summit of a syphon is_______________?

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Your Answer:

equal to atmospheric equal to atmospheric
less than atmospheric less than atmospheric
more than atmospheric more than atmospheric
none of the above none of the above

The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?

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Your Answer:

less less
more more
same same
more/less depending on compressor capacity

When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is

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Your Answer:

A.C. A.C.
D.C. D.C.
Any of above two Any of above two
None of the above None of the above

According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

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Your Answer:

Temperature Temperature
Absolute temperature, if volume is kept constant
Volume, if temperature is kept constant Volume, if temperature is kept constant
None of these None of these

For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

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Your Answer:

0.75 - 0.80 0.75 - 0.80
0.80 - 0.85 0.80 - 0.85
0.85 - 0.92 0.85 - 0.92
Above 0.92 Above 0.92

The purpose of testing an internal combustion engine is

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Your Answer:

To determine the information, which cannot be obtained by calculations
To conform the data used in design, the validity of which may be doubtful
To satisfy the customer regarding the performance of the engine
All of the above All of the above

By which of the following systems electric power may be transmitted?

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Your Answer:

Overhead system Overhead system
Underground system Underground system
Both (A) and (B) Both (A) and (B)
None of the above None of the above

Commonly used conducting materials are

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Your Answer:

Copper Copper
Aluminium Aluminium
Both A and B Both A and B
Copper and silver Copper and silver
Platinum and gold Platinum and gold

The most popular form of IC package is ___________.

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Your Answer:

DIL DIL
Flatpack Flatpack
TO-5 TO-5
None of the above None of the above

Disc windings are primarily used in_____________-?

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Your Answer:

short capacity transformers short capacity transformers
medium capacity transformers medium capacity transformers
high capacity transformers high capacity transformers
any of the above any of the above

Which is not identical for an atom and an isotope?

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Your Answer:

Mass number Mass number
Atomic number Atomic number
Chemical properties Chemical properties
Position in periodic table Position in periodic table

A pre-stressed concrete member

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Your Answer:

Is made of concrete Is made of concrete
Is made of reinforced concrete Is made of reinforced concrete
Is stressed after casting Is stressed after casting
Possesses internal stresses Possesses internal stresses

If $$\Delta $$ is the depth of water in metres, B is the number of days of base period and D is the duty in hectare/cumec, the relationship which holds good, is

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Your Answer:

$${\text{D}} = \Delta \frac{{8.64{\text{D}}}}{{\text{B}}}$$
$${\text{B}} = \Delta \frac{{8.64{\text{B}}}}{{\text{D}}}$$
$${\text{D}} = \frac{{8.64\Delta }}{{\text{B}}}$$
$$\Delta = \frac{{8.64{\text{B}}}}{{\text{D}}}$$

Castle nut is a locking device in which__________________?

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Your Answer:

one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
a slot is cut partly is middle of nut and then slot reduced by tightening a screw
a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

One circuit is equivalent to another, in the context of Thevenin's theorem, when the circuits produce the same voltage.

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Your Answer:

True True
False False

The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

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Your Answer:

$$\frac{{2\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$
$$\frac{{2\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$
$$\frac{{\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$
$$\frac{{\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$

. . . . . . . . can be extended to systems which are time-varying?

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Your Answer:

Bode-Nyquist stability methods Bode-Nyquist stability methods
Transfer functions Transfer functions
Root locus design Root locus design
State model representatives State model representatives

The value of the reheat factor varies from

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Your Answer:

1.02 to 1.06 1.02 to 1.06
1.08 to 1.10 1.08 to 1.10
1.2 to 1.6 1.2 to 1.6
1.6 to 2 1.6 to 2

R.C.C. was developed and first used by:

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Your Answer:

Joseph Monier Joseph Monier
John Smeaton John Smeaton
Francois Coignet Francois Coignet
Joseph Asphadin Joseph Asphadin

The natural petroleum may be separated into

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Your Answer:

Petrol Petrol
Kerosene Kerosene
Fuel oil Fuel oil
Lubricating oil Lubricating oil

Reluctance motor is a________________?

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Your Answer:

variable torque motor variable torque motor
low torque variable speed motor low torque variable speed motor
self starting type synchronous motor self starting type synchronous motor
low noise, slow speed motor low noise, slow speed motor

The sewer pipe which carries sewage from a building for immediate disposal is______________?

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Your Answer:

House sewer House sewer
Lateral sewer Lateral sewer
Intercepting sewer Intercepting sewer
Main sewer Main sewer

Lead acetate test in sewer manhole is done to test the presence of ____________________?

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Your Answer:

Methane gas Methane gas
Hydrogen sulphide Hydrogen sulphide
Carbondioxide gas Carbondioxide gas
Diesel vapours Diesel vapours

For which types of D.C. motor, dynamic braking is generally used?

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Your Answer:

Shunt motors Shunt motors
Series motors Series motors
Compound motors Compound motors
All of the above All of the above

The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)

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Your Answer:

$$\frac{{\text{H}}}{3}$$ $$\frac{{\text{H}}}{3}$$
$$\frac{{2{\text{H}}}}{3}$$ $$\frac{{2{\text{H}}}}{3}$$
$$\frac{{\text{H}}}{2}$$ $$\frac{{\text{H}}}{2}$$
$$\frac{{2{\text{H}}}}{5}$$ $$\frac{{2{\text{H}}}}{5}$$

The example of lower pair is

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Your Answer:

Shaft revolving in a bearing Shaft revolving in a bearing
Straight line motion mechanisms Straight line motion mechanisms
Automobile steering gear Automobile steering gear
All of the above All of the above

The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?

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Your Answer:

Magnetic flux density Magnetic flux density
Torque Torque
Mutual induction Mutual induction
Motional emf Motional emf

Evaluating Your Answers

SSC JE Mock Test 9 : Question 1 of 74