Which one of the following options is the closest in meaning to the word given below?
Mitigate

**A. ** Diminish

**B. ** Divulge

**C. ** Dedicate

**D. ** Denote

**Answer : ****Option A**

**Explaination / Solution: **

Mitigate’ means to make something less harmful, serious, intense etc. Hence correct answer is ‘Diminish’.

Mitigate’ means to make something less harmful, serious, intense etc. Hence correct answer is ‘Diminish’.

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For a particular project, eight activities are to be carried out. Their relationships with other
activities and expected durations are mentioned in the table below.

**A. ** Critical path remains the same and the total duration to complete project changes to 19 days.

**B. ** Critical path and the total duration to complete the project remain the same.

**C. ** Critical path changes but the total duration to complete the project remains the same.

**D. ** Critical path changes and the total duration to complete the project changes to 17 days.

**Answer : ****Option A**

**Explaination / Solution: **

Critical path remains same and total duration will increase by 1 day and it takes 19 days to complete.

If the duration of activity f alone is changed from 9 to 10 days, then the

Critical path remains same and total duration will increase by 1 day and it takes 19 days to complete.

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An automobile plant contracted to buy shock absorbers from two suppliers X and Y. X supplies
60% and Y supplies 40% of the shock absorbers. All shock absorbers are subjected to a quality
test. The ones that pass the quality test are considered reliable. Of X’s shock absorbers, 96% are
reliable.
The probability that a randomly chosen shock absorber, which is found to be reliable, is made by
Y is

**A. ** 0.288

**B. ** 0.334

**C. ** 0.667

**D. ** 0.720

**Answer : ****Option B**

**Explaination / Solution: **

Let total number of shock absorbers be a. Since 60% shock absorbers are supplied by X and 96% of them are reliable. Number of reliable shock absorbers supplied by X = 96% of 60% of a = 0.576a

Let total number of shock absorbers be a. Since 60% shock absorbers are supplied by X and 96% of them are reliable. Number of reliable shock absorbers supplied by X = 96% of 60% of a = 0.576a

Similarly, number of reliable shock absorbers supplied by Y = 72% of 40% of a = 0.288a

Total number of reliable shock absorbers = 0.576a + 0.288a = 0.864a

Probability that a reliable shock absorber is made by Y = (0.288a / 0.864a)
= 0.334

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A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a
cutter of 10 mm diameter between points (0, 0) and (100, 100) on the XY plane (dimensions in
mm). The feed rate used for milling is 50 mm/min. Milling time for the slot (in seconds) is

**A. ** 120

**B. ** 170

**C. ** 180

**D. ** 240

**Answer : ****Option B**

**Explaination / Solution: **

Given data: width (b) = 10 mm

Given data: width (b) = 10 mm

depth (t) = 2 mm

points (0, 0) & (100, 100)

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In a DC arc welding operation, the voltage-arc length characteristic was obtained as V_{arc }= 20 + 5l where the arc length l was varied between 5 mm and 7 mm. Here Varc denotes the arc voltage
in Volts. The arc current was varied from 400 A to 500 A. Assuming linear power source
characteristic, the open circuit voltage and the short circuit current for the welding operation are

**A. ** 45 V, 450 A

**B. ** 75 V, 750 A

**C. ** 95 V, 950 A

**D. ** 150 V, 1500 A

**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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An ideal gas of mass m and temperature T_{1 }undergoes a reversible isothermal process from an
initial pressure P_{1 }to final pressure P_{2}. The heat loss during the process is Q. The entropy change ∆S of the gas is

**A. ** mR In(P2/P1)
**B. ** mR In(P1/P2)

**C. ** mR In(P2/P1) - (Q/T1)

**D. ** zero

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

No Explaination.

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A solid steel cube constrained on all six faces is heated so that the temperature rises uniformly by
∆T. If the thermal coefficient of the material is α. Young’s modulus is E and the Poissons’s ratio
is υ, the thermal stress developed in the cube due to heating is

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option A**

**Explaination / Solution: **

No Explaination.

No Explaination.

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Air enters an adiabatic nozzle at 300 kPa, 500 K with a velocity of 10 m/s. It leaves the nozzle at
100 kPa with a velocity of 180 m/s. The inlet area is 80 cm^{2}. The specific heat of air C_{p} is 1008
J/kg.K.

**A. ** 516 K

**B. ** 532 K

**C. ** 484 K

**D. ** 468 K

**Answer : ****Option C**

**Explaination / Solution: **

The exit temperature of the air is

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For an opaque surface, the absorptivity (α), transmissivity (τ) and reflectivity (ρ) are related by
the equation:

**A. ** α + ρ = τ

**B. ** α + ρ = 1

**C. ** α + ρ + τ = 0

**D. ** α + ρ = 0

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

No Explaination.

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In the mechanism given below, if the angular velocity of the eccentric circular disc is 1 rad/s, the
angular velocity (rad/s) of the follower link for the instant shown in the figure is

**A. ** 0.05

**B. ** 0.1

**C. ** 5.0

**D. ** 10.0

**Answer : ****Option B**

**Explaination / Solution: **

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