SSC JE Mock Test 14 - Online MCQ Exam

A thyristor is basically________?

1 Mark(s)

Your Answer:

PNPN device PNPN device
A combination of diac and triac A combination of diac and triac
A set of SCRs A set of SCRs
A set if SCR,diac and triac A set if SCR,diac and triac

The rate of acceleration on suburban orurban service is in the range_________________?

1 Mark(s)

Your Answer:

0.2 to 0.5 km phps 0.2 to 0.5 km phps
1.6 to 4.0 km phps 1.6 to 4.0 km phps
5 to 10 km phps 5 to 10 km phps
15 to 25 km phps 15 to 25 km phps

If in a pin-jointed plane frame (m + r) > 2j, then the frame is (Where ‘m’ is number of members, ‘r’ is reaction components and ‘j’ is number of joints)

1 Mark(s)

Your Answer:

Stable and statically determinate Stable and statically determinate
Stable and statically indeterminate Stable and statically indeterminate
Unstable Unstable
None of the above None of the above

The switch board instruments

1 Mark(s)

Your Answer:

should be mounted in vertical position should be mounted in vertical position
should be mounted in horizontal position
either (A) or (B) either (A) or (B)
neither (A) nor (B) neither (A) nor (B)

A drop manhole is provided if__________________?

1 Mark(s)

Your Answer:

A sewer drops from a height A sewer drops from a height
A branch sewer joins the main sewer at higher level
A lamp is inserted to check obstruction A lamp is inserted to check obstruction
None of these None of these

Which of the following generators will be preferred if they are required to be run in parallel?

1 Mark(s)

Your Answer:

Shunt generators Shunt generators
Series generators Series generators
Compound generators Compound generators
None of the above None of the above

Sand particles are made of

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Your Answer:

rock minerals rock minerals
kaolinite kaolinite
illite illite
montmorillonite montmorillonite

To avoid formation of grooves in the commutator of a D.C. machine

1 Mark(s)

Your Answer:

The brushes of opposite polarity should track each other
The brushes of same polarity should track each other
Brush position has no effect on the commutator grooving
All of the above All of the above

Delta metal is an alloy of__________________?

1 Mark(s)

Your Answer:

copper, zinc and iron copper, zinc and iron
iron, nickel and copper iron, nickel and copper
iron, lead and tin iron, lead and tin
iron, aluminium and magnesium iron, aluminium and magnesium
copper, zinc and antimony copper, zinc and antimony

In a typical medium speed 4-stroke cycle diesel engine the inlet valve

1 Mark(s)

Your Answer:

Opens at 20° before top dead center and closes at 35° after the bottom dead center
Opens at top dead center and closes at bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
May open or close anywhere May open or close anywhere

Which of the following waves has the highest value of peak factor ?

1 Mark(s)

Your Answer:

Square wave Square wave
Sine wave Sine wave
Half wave rectified sine wave Half wave rectified sine wave
Triangular wave Triangular wave

In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called________________?

1 Mark(s)

Your Answer:

Under-reinforced section Under-reinforced section
Over reinforced section Over reinforced section
Economic section Economic section
Critical section Critical section

Which of the fpllowing inductor will have the least eddy current losses ?

1 Mark(s)

Your Answer:

Air core Air core
Laminated iron core Laminated iron core
Iron core Iron core
Powdered iron core Powdered iron core

When a transistor amplifier is operating, the current in any branch is _______________?

1 Mark(s)

Your Answer:

Sum of a.c. and d.c. Sum of a.c. and d.c.
c. only c. only
c. only c. only
difference of a.c. and d.c. difference of a.c. and d.c.

According to I.B.R., the factor of safety of riveted joint should not be less than

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as

1 Mark(s)

Your Answer:

120 mm 120 mm
160 mm 160 mm
200 mm 200 mm
300 mm 300 mm

Which of the following distribution systems is more reliable?

1 Mark(s)

Your Answer:

Radial system Radial system
Tree system Tree system
Ring main system Ring main system
All are equally reliable All are equally reliable

The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

The square root of the ratio of line impedance and shunt admittance is called the___________?

1 Mark(s)

Your Answer:

surge impedance of the line surge impedance of the line
conductance of the line conductance of the line
regulation of the line regulation of the line
none of the above none of the above

The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at

1 Mark(s)

Your Answer:

1500 rpm 1500 rpm
750 rpm 750 rpm
3000 rpm 3000 rpm
Any value independent of engine speed Any value independent of engine speed

An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 meters and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is

1 Mark(s)

Your Answer:

8.3 kg/cm2 8.3 kg/cm2
7.6 kg/cm2 7.6 kg/cm2
21.5 kg/cm2 21.5 kg/cm2
11.4 kg/cm2 11.4 kg/cm2

Buchholz's relay gives warning and protection against

1 Mark(s)

Your Answer:

electrical fault inside the transformer itself
electrical fault outside the transformer in outgoing feeder
for both outside and inside faults for both outside and inside faults
none of the above none of the above

Excess of alumina in brick earth makes the brick______________?

1 Mark(s)

Your Answer:

impermeable impermeable
brittle and weak brittle and weak
to lose cohesion to lose cohesion
to crack and warp on drying to crack and warp on drying

Which of the following types of motor enclosure is safest ?

1 Mark(s)

Your Answer:

Totally enclosed Totally enclosed
Totally enclosed fan cooled Totally enclosed fan cooled
Open type Open type
Semi closed Semi closed

What is the voltage drop across R1?

1 Mark(s)

Your Answer:

850 mV 850 mV
7.82 V 7.82 V
9.18 V 9.18 V
918 mV 918 mV

A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is

1 Mark(s)

Your Answer:

0.25 0.25
0.50 0.50
0.75 0.75
1.0 1.0

For a D.C. shunt motor if the excitation is changed_______________?

1 Mark(s)

Your Answer:

torque will remain constant torque will remain constant
torque will change but power will remain constant
torque and power both will change torque and power both will change
torque, power and speed, all will change

For rapid curing cutbacks, the oil used is

1 Mark(s)

Your Answer:

gasoline gasoline
kerosene oil kerosene oil
light diesel light diesel
heavy diesel heavy diesel

The stopping sight distance depends upon

1 Mark(s)

Your Answer:

total reaction time of driver total reaction time of driver
speed of vehicle speed of vehicle
efficiency of brakes efficiency of brakes
all of the above all of the above

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

1 Mark(s)

Your Answer:

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

The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will__________________?

1 Mark(s)

Your Answer:

increase increase
decrease decrease
may increase or decrease depending on the type of refrigerant used
remain unaffected remain unaffected

The slope of a.c. load line is ______________ that of d.c. load line?

1 Mark(s)

Your Answer:

The same as The same as
More than More than
Less than Less than
None of the above None of the above

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft___________________?

1 Mark(s)

Your Answer:

1/2 1/2
1 1
2 2
4 4

The amplifier gain varies with frequency. This happens mainly due to

1 Mark(s)

Your Answer:

Miller effect Miller effect
Presence of external and internal capacitance
Logarithmic increase in its output Logarithmic increase in its output
Inter stage transformer Inter stage transformer

Solid fuel for nuclear reactions may be fabricated into various small shapes such as

1 Mark(s)

Your Answer:

Plates Plates
Pallets Pallets
Pins Pins
Any one of the above Any one of the above

As compared to English bond, double Flemish bond is

1 Mark(s)

Your Answer:

Stronger Stronger
More compact More compact
Costly Costly
None of the above None of the above

All good conductors have high

1 Mark(s)

Your Answer:

Conductance Conductance
Resistance Resistance
Reluctance Reluctance
Thermal conductivity Thermal conductivity

If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?

1 Mark(s)

Your Answer:

1 in 60 1 in 60
1 in 100 1 in 100
1 in 120 1 in 120
None of these None of these

SITH is also known as___________?

1 Mark(s)

Your Answer:

Filled controlled diode Filled controlled diode
Filled controlled rectifier Filled controlled rectifier
Silicon controlled rectifier Silicon controlled rectifier
None of these None of these

By over-reinforcing a beam, the moment of resistance can be increased not more than________________?

1 Mark(s)

Your Answer:

10 % 10 %
15 % 15 %
20 % 20 %
25 % 25 %

If the full-scale deflection current of a multimeter is 50 µA, its sensitivity is

1 Mark(s)

Your Answer:

10 kΩ/V 10 kΩ/V
100 kΩ/V 100 kΩ/V
50 kΩ/V 50 kΩ/V
20 kΩ/V 20 kΩ/V

The machinability of steel is increased by___________________?

1 Mark(s)

Your Answer:

silicon and sulphur silicon and sulphur
phosphorous, lead and sulphur phosphorous, lead and sulphur
sulphur, graphite and aluminium sulphur, graphite and aluminium
phosphorous and aluminium phosphorous and aluminium
none of the above none of the above

The valve rod in a steam engine is connected to an eccentric rod by

1 Mark(s)

Your Answer:

Cotter joint Cotter joint
Bolted joint Bolted joint
Knuckle joint Knuckle joint
Universal coupling Universal coupling

The property of a material which allows it to be drawn into a smaller section is called________________?

1 Mark(s)

Your Answer:

plasticity plasticity
ductility ductility
elasticity elasticity
malleability malleability

Which of the following metal is used for nuclear energy?

1 Mark(s)

Your Answer:

Uranium Uranium
Thorium Thorium
Niobium Niobium
All of these All of these

Drop manholes are the manholes___________________?

1 Mark(s)

Your Answer:

Without entry ladders Without entry ladders
Without manhole covers Without manhole covers
With depths more than 3.5 m With depths more than 3.5 m
Having drains at different levels Having drains at different levels

If E, N, K and $$\frac{1}{{\text{m}}}$$ are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good

1 Mark(s)

Your Answer:

$${\text{E}} = 3{\text{K}}\left( {1 - \frac{2}{{\text{m}}}} \right)$$
$${\text{E}} = 2{\text{N}}\left( {1 + \frac{1}{{\text{m}}}} \right)$$
$$\frac{3}{2}{\text{K}}\left( {1 - \frac{2}{{\text{m}}}} \right) = {\text{N}}\left( {1 + \frac{1}{{\text{m}}}} \right)$$
All the above All the above

All heat engines utilize_____________________?

1 Mark(s)

Your Answer:

low heat value of oil low heat value of oil
high heat value of oil high heat value of oil
net claorific value of oil net claorific value of oil
calorific value of fuel calorific value of fuel

_______ was the first city in India to adopt electric traction.

1 Mark(s)

Your Answer:

Delhi Delhi
Madras (Chennai) Madras (Chennai)
Calcutta (kolkata) Calcutta (kolkata)
Bombay (Mumbai) Bombay (Mumbai)

A cylindrical specimen of saturated soil failed under an axial vertical stress of 100 kN/m2 when it was laterally un-confmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

1 Mark(s)

Your Answer:

0.5 N/mm2 and 30° 0.5 N/mm2 and 30°
0.05 N/mm2 and 0° 0.05 N/mm2 and 0°
0.2 N/mm2 and 0° 0.2 N/mm2 and 0°
0.05 N/mm2 and 45° 0.05 N/mm2 and 45°

Evaluating Your Answers

SSC JE Mock Test 14 : Question 1 of 50